Re: [FFmpeg-user] v360 / perspective
Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days old. You can reproduce this with any equirectangular input image. ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective -y out1.png The output of the above command has two problems: -- The center of the input image is not mapped to the center of the output image. For most other projections the image center is preserved. -- The output is mirror reversed (which means you cannot read text). Both problems can be corrected with this workaround: ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective:pitch=90:v_flip=1 -y out2.png Now I want to add a yaw rotation after the pitch rotation: ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective:rorder=pyr:pitch=90:yaw=20:v_flip=1 -y out3.png But in the output you can see that a roll rotation was done. Today I did for the very first time figure out how to compile ffmpeg. The above problem can be solved by changing two lines in vf_v360.c Sorry, I haven't yet figured out how to use git.One thing after the other... Old version: line 3136: vec[1] = sin_theta; line 3137: vec[2] = cos_theta * cos_phi; New version: line 3136: vec[1] = cos_theta * cos_phi; line 3137: vec[2] = sin_theta; I'm not sure if lines 3139 to 3141 must also be changed. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] v360 / perspective
Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days old. You can reproduce this with any equirectangular input image. ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective -y out1.png The output of the above command has two problems: -- The center of the input image is not mapped to the center of the output image. For most other projections the image center is preserved. -- The output is mirror reversed (which means you cannot read text). Both problems can be corrected with this workaround: ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective:pitch=90:v_flip=1 -y out2.png Now I want to add a yaw rotation after the pitch rotation: ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective:rorder=pyr:pitch=90:yaw=20:v_flip=1 -y out3.png But in the output you can see that a roll rotation was done. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 28.11.2020 um 22:09 schrieb Paul B Mahol: Ok, made the wet option do actually apply gain to final output. I think the asubboost block diagram does now look like this (view with fixed width font): IN -o> DRY ---> ADD -> WET -> OUT | ^ | | +-> LP -> ADD -o-> FEEDBACK -+ ^ | | | +- DECAY <- DELAYLINE <-+ The name "feedback" is misleading because this signal isn't going back. It would make sense to rename "feedback" to "wet". What's now "wet" could be renamed "gain", or it could be removed because it's unnecessary. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 28.11.2020 um 19:18 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 5:18 PM Michael Koch wrote: Am 28.11.2020 um 14:48 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 2:46 PM Paul B Mahol wrote: On Sat, Nov 28, 2020 at 2:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 28.11.2020 um 13:44 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 1:35 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. I did try to reverse engineer the asubboost filter from its output signal. Is the attached sketch correct? It seems the "feedback" parameter is unnecessary because it does exactly the same thing as "wet". No, your reasoning is invalid. I do not have time to draw graphs or do consulting for free. When you swap the values of "wet" and "feedback", the output does always remain the same. If you think that I'm wrong, please show an example to prove the opposite. Make sure that you take into account decay parameter, delay buffer is still used. When you swap the values of "wet" and "feedback", the output does always remain the same, regardless which values you use for "dry", "decay" and "delay". As can be shown with this example: set "A=0.4" set "B=0.7" ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%A%:decay=0.4:feedback=%B%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out1.png ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%B%:decay=0.4:feedback=%A%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out2.png ffmpeg -i out1.png -i out2.png -lavfi vstack -y out.png Red is input step signal, green is output step response of the asubboost filter. In the lower half of the output image the "wet" and "feedback" values are swapped. What we said previously about delay buffers and that above command? It was literally less than 24h. The previous example was "showfreqs" which has a frequency domain output. Not suitable for analyzing filters which contain delays. Now I'm using "showwaves" which has time domain output. That's a different thing. Of course delay lines can be analyzed in time domain. That command can not show you the action of delayed input as it is not designed for it. A step signal contains all frequencies and is the best possible source for analyzing unknown black boxes that may contain delays. You can replace the input by any other source, but you will never find any difference in the two outputs. It's a fact, "wet" and "feedback" are interchangeable. Nope, you are very mistaken. Try with real audio. You can use this example with any real audio input you want: set "A=0.4" set "B=0.7" ffmpeg -i dog.mp3 -lavfi asubboost=dry=0.3:wet=%A%:decay=0.4:feedback=%B%:delay=50 -y out1.wav ffmpeg -i dog.mp3 -lavfi asubboost=dry=0.3:wet=%B%:decay=0.4:feedback=%A%:delay=50 -y out2.wav ffmpeg -i out1.wav -i out2.wav -lavfi [0][1]amerge,aeval=val(0)-val(1) -y out.wav out.wav is the difference between out1.wav and out2.wav, and it's perfect silence. Which means the two inputs are equal. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 28.11.2020 um 14:48 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 2:46 PM Paul B Mahol wrote: On Sat, Nov 28, 2020 at 2:24 PM Michael Koch wrote: Am 28.11.2020 um 13:44 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 1:35 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. I did try to reverse engineer the asubboost filter from its output signal. Is the attached sketch correct? It seems the "feedback" parameter is unnecessary because it does exactly the same thing as "wet". No, your reasoning is invalid. I do not have time to draw graphs or do consulting for free. When you swap the values of "wet" and "feedback", the output does always remain the same. If you think that I'm wrong, please show an example to prove the opposite. Make sure that you take into account decay parameter, delay buffer is still used. When you swap the values of "wet" and "feedback", the output does always remain the same, regardless which values you use for "dry", "decay" and "delay". As can be shown with this example: set "A=0.4" set "B=0.7" ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%A%:decay=0.4:feedback=%B%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out1.png ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%B%:decay=0.4:feedback=%A%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out2.png ffmpeg -i out1.png -i out2.png -lavfi vstack -y out.png Red is input step signal, green is output step response of the asubboost filter. In the lower half of the output image the "wet" and "feedback" values are swapped. What we said previously about delay buffers and that above command? It was literally less than 24h. The previous example was "showfreqs" which has a frequency domain output. Not suitable for analyzing filters which contain delays. Now I'm using "showwaves" which has time domain output. That's a different thing. Of course delay lines can be analyzed in time domain. That command can not show you the action of delayed input as it is not designed for it. A step signal contains all frequencies and is the best possible source for analyzing unknown black boxes that may contain delays. You can replace the input by any other source, but you will never find any difference in the two outputs. It's a fact, "wet" and "feedback" are interchangeable. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 28.11.2020 um 13:44 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 1:35 PM Michael Koch wrote: Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. I did try to reverse engineer the asubboost filter from its output signal. Is the attached sketch correct? It seems the "feedback" parameter is unnecessary because it does exactly the same thing as "wet". No, your reasoning is invalid. I do not have time to draw graphs or do consulting for free. When you swap the values of "wet" and "feedback", the output does always remain the same. If you think that I'm wrong, please show an example to prove the opposite. Make sure that you take into account decay parameter, delay buffer is still used. When you swap the values of "wet" and "feedback", the output does always remain the same, regardless which values you use for "dry", "decay" and "delay". As can be shown with this example: set "A=0.4" set "B=0.7" ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%A%:decay=0.4:feedback=%B%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out1.png ffmpeg -f lavfi -i aevalsrc='0.5*gt(t,0.1)':d=1 -lavfi asplit[a][b];[b]asubboost=dry=0.3:wet=%B%:decay=0.4:feedback=%A%:delay=50[c],[a][c]join,showwaves=draw=full:s=800x300:r=1 -frames 1 -y out2.png ffmpeg -i out1.png -i out2.png -lavfi vstack -y out.png Red is input step signal, green is output step response of the asubboost filter. In the lower half of the output image the "wet" and "feedback" values are swapped. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. I did try to reverse engineer the asubboost filter from its output signal. Is the attached sketch correct? It seems the "feedback" parameter is unnecessary because it does exactly the same thing as "wet". No, your reasoning is invalid. I do not have time to draw graphs or do consulting for free. When you swap the values of "wet" and "feedback", the output does always remain the same. If you think that I'm wrong, please show an example to prove the opposite. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 27.11.2020 um 23:27 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 11:20 PM Michael Koch wrote: Am 27.11.2020 um 22:47 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 10:40 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. Sorry, I didn't understand it. I think this filter could be explained much better with a block diagram. -- Is it correct that the "slope" parameter effectively changes the cutoff frequency, but doesn't change the steepness (dB / octave) of the filter? It changes steepness, not cutoff. What's the unit of the "slope" option? 1 / octave, can be set as dB unit, eg. -20dB, 0dB or 1 is max value. Use mentioned mpv command for the reason, as it displays curve. The command does not work on my computer. I did download mpv.exe and run the command line. mpv exits immediately, no output, no error message. When I run mpv without any options, then a mpv window opens. Make sure you run it inside power shell or cmd.exe and make sure you tried mpv.com too. Now with mpv.com it works. But the version doesn't yet have the asubboost filter. With other filters it works. Download the latest release version of mpv. Also note that asubbost is not a simple IIR filter and thus it can not really show its response. That's clear. If the filter has a delay line, then a simple frequency response makes no sense. It would really help if you could draw a block diagram for asubboost. That would be much easier to understand than a description with words. Michael -- ****** ASTRO ELECTRONIC Dipl.-Ing. Michael Koch Raabestr. 43 37412 Herzberg www.astro-electronic.de Tel. +49 5521 854265 Fax +49 5521 854266 ** ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 27.11.2020 um 22:47 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 10:40 PM Michael Koch wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. Sorry, I didn't understand it. I think this filter could be explained much better with a block diagram. -- Is it correct that the "slope" parameter effectively changes the cutoff frequency, but doesn't change the steepness (dB / octave) of the filter? It changes steepness, not cutoff. What's the unit of the "slope" option? 1 / octave, can be set as dB unit, eg. -20dB, 0dB or 1 is max value. Use mentioned mpv command for the reason, as it displays curve. The command does not work on my computer. I did download mpv.exe and run the command line. mpv exits immediately, no output, no error message. When I run mpv without any options, then a mpv window opens. Make sure you run it inside power shell or cmd.exe and make sure you tried mpv.com too. Now with mpv.com it works. But the version doesn't yet have the asubboost filter. With other filters it works. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. Sorry, I didn't understand it. I think this filter could be explained much better with a block diagram. -- Is it correct that the "slope" parameter effectively changes the cutoff frequency, but doesn't change the steepness (dB / octave) of the filter? It changes steepness, not cutoff. What's the unit of the "slope" option? 1 / octave, can be set as dB unit, eg. -20dB, 0dB or 1 is max value. Use mentioned mpv command for the reason, as it displays curve. The command does not work on my computer. I did download mpv.exe and run the command line. mpv exits immediately, no output, no error message. When I run mpv without any options, then a mpv window opens. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] asubboost and asupercut
Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay" and "feedback" options are unclear. What's the input of the the delay line? Before or after the low pass filter? Where does the feedback go to? Before or after the lowpass filter? I have attached a sketch of a possible block diagram, but it's only a wild guess. This filter just adds delayed sub frequencies set by cut off frequency back to output. Decay sets decay of old sub echo in buffer and feedback sets how much new sub frequencies are added to the delay buffer. Sorry, I didn't understand it. I think this filter could be explained much better with a block diagram. -- Is it correct that the "slope" parameter effectively changes the cutoff frequency, but doesn't change the steepness (dB / octave) of the filter? It changes steepness, not cutoff. What's the unit of the "slope" option? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3
Am 23.11.2020 um 16:14 schrieb Karl Messner: Michael, Thank you so much for your help. I made the changes you suggested and now I'm getting this: ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v0];\ [1]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v1];\ [2]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v2];\ [3:a]volume=.015[a0];\ [1:a][a0]amerge[amix];\ [v0][0:a:0] [v1][amix] [v2][2:a:0]concat=n=3:v=1:a=1[v][a]" -map "[v]" -map "[a]" -f mp4 videos/out1606144376.mp4 2>&1 [Parsed_amerge_10 @ 0x21c96c0] No channel layout for input 1 [Parsed_amerge_10 @ 0x21c96c0] No channel layout for input 2 [AVFilterGraph @ 0x1a76460] The following filters could not choose their formats: Parsed_amerge_10 Consider inserting the (a)format filter near their input or output. Error configuring complex filters. Input/output error Are you sure that "amerge" is the correct filter for your purpose? Why not the "amix" filter? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3
Am 23.11.2020 um 13:50 schrieb KarlMessner: Good morning folks, Any idea what I'm doing wrong here: /usr/local/bin/ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v0]; \ [1] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v1]; \ [2] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v2]; \ [3:a]volume=.015[a0]; \ *[1:a][a0]amerge[amix]; \ *[v0][0:a:0] [v1][aMix] [v2][2:a:0] concat=n=3:v=1:a=1[v][a]" -map "[v]" -map "[a]" -f mp4 videos/out1606134367mp4 2>&1 it's another error: amix != aMix Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3
Am 23.11.2020 um 13:50 schrieb KarlMessner: Good morning folks, Any idea what I'm doing wrong here: /usr/local/bin/ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v0]; \ [1] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v1]; \ [2] scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v2]; \ [3:a]volume=.015[a0]; \ *[1:a][a0]amerge[amix]; \ *[v0][0:a:0] [v1][aMix] [v2][2:a:0] concat=n=3:v=1:a=1[v][a]" -map "[v]" -map "[a]" -f mp4 videos/out1606134367mp4 2>&1 Try to remove all space characters from the filter chain. Especially those between the inputs of the concat filter. I'm not sure if this solves the problem, but it's worth a try. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Directly converting DNGs to MP4
Am 08.11.2020 um 18:12 schrieb ZEITFELD: Hello nice girls ans guys! I have a highspeed camera that records raw data to DNG files. Now I try to have the fastest possible preview video of what is recorded. I succeeded using the GPU via FFMPEG, which is absolutely the fastest way I found until now. This is the command line I use: FFMPEG -R 25 -F IMAGE2 -I FRAME_%06D.DNG -VCODEC LIBX264 -CRF 25 -PIX_FMT YUV420P PREVIEW.MP4 This gives me a MP4, but the colors are broken, the image is too dark and green and the quality is very bad, with a lot of banding and artifacts. Does anyone know how to make ffmpeg apply reasonably balanced settings when reading the DNGs? did you (or anybody else) find a solution for this problem? Paul did already give a few hints: -- swscale is old and ignores color_trc metadata that is required for correct display -- use zscale for converting pixel formats -- set output trc -- make sure to set right pixel format prior to calling zscale as it does not support bayer formats Open questions: -- How can zscale be used for converting the pixel format, if it doesn't support the "bayer_rggb16le" format that the input images have? zscale doesn't have any options for pixel formats. -- Is "output trc" a synonym for "transfer characteristic"? Is that the "transfer" option in zscale? To which value must it be set? -- How can the pixel format be set prior to calling zscale? With "-pix_fmt" before the input? Or after the input? Or with "-pixel_format"? Or with "format=" at the beginning of the filter chain? -- The input color space is "sRGB". How can this be set? I did already spend about 20 hours of try-and-error on this problem before I gave up. Part of the problem is the missing documentation for the zscale filter. That's only a list of options and possible values. No explanations what the options mean, and no examples. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] {Spam?} Re: crop and fade
Am 20.11.2020 um 11:59 schrieb RAPPAZ Francois via ffmpeg-user: I think the command line is correct, and the hint from Gyan was of course correct. The problem might be that your video player can't display 25fps at this extremely high resolution. Try a smaller resolution. It makes no sense to use higher resultion than your monitor can display. Michael I did ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1:s=5152x3864,framerate=fps=5:interp_start=0:interp_end=255:scene=100 ^ -pix_fmt yuv420p out.mp4 Which gives a nice result. Thanks ! What I meant was to reduce the size, for example to 2000x1500. Reducing the framerate to 5 might be a problem for some players. Is there a way to say : do the fade effect for all pictures, except the last (which is 14.JPG) ? Duplicate the last picture, so that the last two pictures are the same, and/or limit the total duration of the video with the -t option to a suitable length. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] {Spam?} Re: crop and fade
Am 20.11.2020 um 10:58 schrieb RAPPAZ Francois via ffmpeg-user: Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:sc en e=100 ^ -pix_fmt yuv420p -s 5152x3864 out.mp4 It seems that -s 5152x3864 destroy the fading effect achieved with the second line How can I correct this ? You must bring all pictures to the same size _before_ you read them with FFmpeg. Re-scaling one image with FFmpeg: ffmpeg -i input.jpg -s 5152x3864 output.jpg Re-scaling all images with FFmpeg: I think that's only possible with a loop in a script. Too complicated. Re-scaling one image with IrfanView: Open the image, Image --> Resize/Resample, Save as... Michael But my individual pictures are already at 5152x3864. The problem is that when I do the above command without -s ...x... they are stretched in the horizontal axis What should be the size to use for my pictures to be displayed without distortion ? The zoompan filter automatically rescales its input to 1280x720. Override it by adding `s=5152x3864` as an option to the zoompan filter. Remove the `-s` option from the command. I did this ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1:s=5152x3864,framerate=fps=25:interp_start=0:interp_end=255:scene=100 ^ -pix_fmt yuv420p out.mp4 Which do not give any error but destroys the fading effect Could you give the complete command line ? I think the command line is correct, and the hint from Gyan was of course correct. The problem might be that your video player can't display 25fps at this extremely high resolution. Try a smaller resolution. It makes no sense to use higher resultion than your monitor can display. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] {Spam?} Re: crop and fade
Am 20.11.2020 um 07:27 schrieb RAPPAZ Francois via ffmpeg-user: Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:scen e=100 ^ -pix_fmt yuv420p -s 5152x3864 out.mp4 It seems that -s 5152x3864 destroy the fading effect achieved with the second line How can I correct this ? You must bring all pictures to the same size _before_ you read them with FFmpeg. Re-scaling one image with FFmpeg: ffmpeg -i input.jpg -s 5152x3864 output.jpg Re-scaling all images with FFmpeg: I think that's only possible with a loop in a script. Too complicated. Re-scaling one image with IrfanView: Open the image, Image --> Resize/Resample, Save as... Michael But my individual pictures are already at 5152x3864. The problem is that when I do the above command without -s ...x... they are stretched in the horizontal axis What should be the size to use for my pictures to be displayed without distortion ? And the individual images are not stretched in the horizontal axis? Please show the uncut console output. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 19.11.2020 um 13:19 schrieb Paul B Mahol: Added commands to despill and frei0r filters. thank you! I'll test it in a few days when the Windows build is available. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] crop and fade
Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:scene=100 ^ -pix_fmt yuv420p -s 5152x3864 out.mp4 It seems that -s 5152x3864 destroy the fading effect achieved with the second line How can I correct this ? You must bring all pictures to the same size _before_ you read them with FFmpeg. Re-scaling one image with FFmpeg: ffmpeg -i input.jpg -s 5152x3864 output.jpg Re-scaling all images with FFmpeg: I think that's only possible with a loop in a script. Too complicated. Re-scaling one image with IrfanView: Open the image, Image --> Resize/Resample, Save as... Re-scaling all images with IrfanView: File --> Batch Conversion, then select all images, then click on "advanced", the rest is self-explaining. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Slide show with transition
Am 18.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: The problem is that your images 3 and 4 have different size. As far as I know, FFmpeg can't combine images with different sizes to a slideshow (please correct me if I'm >wrong). By the way, all images must also have the same pixel format. I did't check that in your images. For example, if one image has yuv420 and another has yuv422, that >won't work. Possible workaround: Use batch processing in IrfanView to bring all images to the same size. Michael Size is the size in pixels or in bytes ? width and height Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 18.11.2020 um 14:40 schrieb Moritz Barsnick: On Mon, Nov 16, 2020 at 20:15:54 +0100, Michael Koch wrote: Oh, what a pity. We need more filters with support for commands. Now that I have found out how to send zmq commands from C# code, there are so many nice things that could be done with FFmpeg in real time. Especially when adjusting parameters that need visual feedback, for example brightness, contrast, gamma, color corrections, colorkey parameters, despill parameters and so on... Paul has worked heavily over the last few months to add command support to filters (and to properly document it). I guess it just isn't trivial in many cases, as the filters sometimes have not been designed with runtime reconfiguration in mind. (Any it may not be possible at all in certain cases.) Yes, I know that Paul has added command support to many filters and I really appreciate this work! Paul, is it possible to add command support also for the despill filter? I'm asking because I've written a C# tool for bluescreening in real time. The foreground video comes from a camera via HDMI to USB converter (these cheap chinese converters are great!). The background comes from a file and is played in an endless loop. I have attached a screenshot. The color bars are the built-in test image from the HDMI to USB converter. All parameters can be adjusted with the scrollbars in real time and are sent to the FFmpeg process as zmq messages. It's already running fine. The only problem is that the despill parameters can't be updated in real time. They become effective after stopping and re-starting FFmpeg (which takes about 2 seconds). If you want to see how this was programmed, have a look at chapter 2.56 of my book: www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Slide show with transition
Am 18.11.2020 um 09:50 schrieb RAPPAZ Francois via ffmpeg-user: I have 15 JPEG file to be used for a slide (duration: 135 sec): Each image is display 9 seconds and without transition the mkv file is ok. I tried this for a transition 1 second long ffmpeg -y -framerate 1/9 -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=9:fps=1,framerate=fps=15:interp_start=0:interp_end=255:scene =100 ^ -r 15 -vsync vfr -pix_fmt yuv420p output.mkv The transition is ok for the first 3 image then the slide jump to image at position 10 and that picture remains blocked... What am I doing wrong ? this works for me: rem make 15 test images ffmpeg -f lavfi -i testsrc2=size=vga:duration=15:rate=1 -y test%%2d.jpg rem make slideshow, each image is shown 9 sec + 1 sec crossfade ffmpeg -i test%%02d.jpg -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:scene=100 out.mp4 Michael My images files are 01.JPG, 02.JPG ... 10.JPG upto 15.JPG I wonder if " -i %%02d.JPG " is realy working or is correct. I still have a jump to 10.JPG after 03.JPG You can access my files here if you have the time https://drive.switch.ch/index.php/s/DbAVwtai3mOT43j The problem is that your images 3 and 4 have different size. As far as I know, FFmpeg can't combine images with different sizes to a slideshow (please correct me if I'm wrong). By the way, all images must also have the same pixel format. I did't check that in your images. For example, if one image has yuv420 and another has yuv422, that won't work. Possible workaround: Use batch processing in IrfanView to bring all images to the same size. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Slide show with transition
Am 17.11.2020 um 16:05 schrieb RAPPAZ Francois via ffmpeg-user: I have 15 JPEG file to be used for a slide (duration: 135 sec): Each image is display 9 seconds and without transition the mkv file is ok. I tried this for a transition 1 second long ffmpeg -y -framerate 1/9 -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=9:fps=1,framerate=fps=15:interp_start=0:interp_end=255:scene=100 ^ -r 15 -vsync vfr -pix_fmt yuv420p output.mkv The transition is ok for the first 3 image then the slide jump to image at position 10 and that picture remains blocked... What am I doing wrong ? this works for me: rem make 15 test images ffmpeg -f lavfi -i testsrc2=size=vga:duration=15:rate=1 -y test%%2d.jpg rem make slideshow, each image is shown 9 sec + 1 sec crossfade ffmpeg -i test%%02d.jpg -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:scene=100 out.mp4 Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg: slide show on Windows
Am 17.11.2020 um 14:09 schrieb RAPPAZ Francois via ffmpeg-user: Thanks that was it And if I Would like to have each image shown during 15 seconds (I have 15 pictures and whants the total time being 225 sec), How should I specified the -framerate and -r ? I tried ffmpeg -y -f image2 -framerate 1/5 -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 -vsync vfr -r 15 -pix_fmt yuv420p output.mkv But that it's too short a time for each picture "-framerate 1/5" specifies the framerate at which you read the pictures, 1/5 means 5 seconds. "-r" is the output framerate. If you omit this option, then the default 25fps is used. Some players have problems with small framerates. If you want crossfadings between the pictures, have a look at chapter 2.3 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg: slide show on Windows
Am 17.11.2020 um 11:50 schrieb RAPPAZ Francois via ffmpeg-user: I'm on Windows 10 with ffmpeg ... Then I tried with ffmpeg -y -f image2 -framerate 8 -i "%02d.JPG" -i SligoAir_WhiteBlanket.mp3 -vsync vfr -pix_fmt yuv420p output.mkv If you are starting this command line from a batch file, you must escape the % character: -i %%02d.jpg The "" quotation marks can be omitted. "-f image2" can also be omitted. I think "-vsync vfr" can also be omittred (but here I'm not sure). Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 16.11.2020 um 20:01 schrieb Paul B Mahol: Is it possible to send zmq messages to the despill filter? I want to adjust the mix, expand and brightness parameters in real time. I'm sending the zmq messages from my own C# program. Messages to colorkey (color, similarity) and overlay (x, y) are already working. When I send messages to the despill filter, there is no error message but nothing changes in the output video. Either I have something wrong in my code, or the despill filter doesn't use the new values. Nowhere is documented that despill have support for commands and thus it does not have support for commands. Oh, what a pity. We need more filters with support for commands. Now that I have found out how to send zmq commands from C# code, there are so many nice things that could be done with FFmpeg in real time. Especially when adjusting parameters that need visual feedback, for example brightness, contrast, gamma, color corrections, colorkey parameters, despill parameters and so on... Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 16.11.2020 um 16:12 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:41 PM Michael Koch wrote: Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch < astroelectro...@t-online.de> wrote: When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground](a),colorkey,(b)[fg];[background][fg]overlay,(c) I found here an example for (c) but I doubt that this makes sense: https://gist.github.com/kerbeh/fbe0cd0d89c424708c119e0a0d00ca88 Why do you doubt that it does make sense? I doubt that (c) is the right place because at position (c) the despill filter also affects the background video, which surely doesn't have any contamination from the bluescreen. Then use it after colorkey. Is it possible to send zmq messages to the despill filter? I want to adjust the mix, expand and brightness parameters in real time. I'm sending the zmq messages from my own C# program. Messages to colorkey (color, similarity) and overlay (x, y) are already working. When I send messages to the despill filter, there is no error message but nothing changes in the output video. Either I have something wrong in my code, or the despill filter doesn't use the new values. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 16.11.2020 um 16:12 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:41 PM Michael Koch wrote: Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch < astroelectro...@t-online.de> wrote: When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground](a),colorkey,(b)[fg];[background][fg]overlay,(c) I found here an example for (c) but I doubt that this makes sense: https://gist.github.com/kerbeh/fbe0cd0d89c424708c119e0a0d00ca88 Why do you doubt that it does make sense? I doubt that (c) is the right place because at position (c) the despill filter also affects the background video, which surely doesn't have any contamination from the bluescreen. Then use it after colorkey. Thank you, you confirmed what I also thought is the best place for the despill filter. But I wasn't sure. Might be a good idea to add a short note to the documentation of the despill filter. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Best place for despill filter?
Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch wrote: When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground](a),colorkey,(b)[fg];[background][fg]overlay,(c) I found here an example for (c) but I doubt that this makes sense: https://gist.github.com/kerbeh/fbe0cd0d89c424708c119e0a0d00ca88 Why do you doubt that it does make sense? I doubt that (c) is the right place because at position (c) the despill filter also affects the background video, which surely doesn't have any contamination from the bluescreen. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Best place for despill filter?
When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground](a),colorkey,(b)[fg];[background][fg]overlay,(c) I found here an example for (c) but I doubt that this makes sense: https://gist.github.com/kerbeh/fbe0cd0d89c424708c119e0a0d00ca88 Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Add a silent audio stream if no audio stream exists
Am 11.11.2020 um 21:59 schrieb Jim DeLaHunt: 2. Generate a more elaborate FFmpeg invocation which will generate silent audio streams for input files which have none. The details of this should be in a separate thread with a separate Subject: line. That's an interesting question. Can this be done in one command line? If the input video has an audio stream, then leave it as it is. If no audio stream exists, then add silent audio. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Stream specifier ':a' in filtergraph Error
Am 10.11.2020 um 22:27 schrieb Randy Johnson via ffmpeg-user: Hello, When running the following command: ``` ffmpeg \ -loop 1 -framerate 30 -t 1.4 -i /assets/img/filler640480.jpg -i 0d.mp4 - y \ -loop 1 -framerate 30 -t 891.113 -i /assets/img/filler640480.jpg -i 9f.mp4 -y \ -f lavfi -t 0.1 -i anullsrc=channel_layout=mono:sample_rate=48000 \ -filter_complex " [0:v]setsar=1[v0];[2:v]setsar=1[v1];[v0][4:a][1:v][1:a][v1][4:a][3:v][3:a]concat=n=4:v=1:a=1" -vsync 2 -vcodec libx264 -pix_fmt yuv420p 0245-grid.mp4 ``` I am getting the following error: ``` Stream specifier ':a' in filtergraph description [0:v]setsar=1[v0];[2:v]setsar=1[v1];[v0][4:a][1:v][1:a][v1][4:a][3:v][3:a]concat=n=4:v=1:a=1 matches no streams. ``` This only happens on some video processing not all, cannot seem to figure out why. You could check those videos with FFprobe. May be they have no audio stream, or something else is different. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] dshow video source in FFplay
Am 01.11.2020 um 19:07 schrieb Carl Eugen Hoyos: Am So., 1. Nov. 2020 um 11:03 Uhr schrieb Michael Koch : I'm using a cheap HDMI to USB converter for video input. The converter supports different sizes and framerates and two different video codecs. This command line works as expected: ffplay -f dshow -video_size 1920x1080 -framerate 30 -vcodec mjpeg video="USB Video" (Complete, uncut console output missing.) However for my application I need two input streams, and because FFplay doesn't allow filter_complex Use ffmpeg instead of ffplay, there is an sdl output device. That's a good idea, it's already working. Thank you! Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] dshow video source in FFplay
Hello, I'm using a cheap HDMI to USB converter for video input. The converter supports different sizes and framerates and two different video codecs. This command line works as expected: ffplay -f dshow -video_size 1920x1080 -framerate 30 -vcodec mjpeg video="USB Video" However for my application I need two input streams, and because FFplay doesn't allow filter_complex, I have to use the workaround with a "movie" source inside "-lavfi". The second input will be added later. This command line does also work as expected: ffplay -f lavfi movie=filename="USB Video":f=dshow:s=dv When I use the "movie" source, how can I specify size, framerate and codec? The movie source doesn't have these options. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] start FFplay without console window?
Am 30.10.2020 um 13:53 schrieb Moritz Barsnick: Hallo Michael, On Fri, Oct 30, 2020 at 01:29:04 +0100, Michael Koch wrote: Is it possible to start FFplay (from a C# application) so that only the video window is visible, while the console window is hidden or minimized? That's more of a C#/Windows question than an ffmpeg question. (Assuming you're not using C# on a different platform here. ;-)) Windows seems to require opening a console for launching such an external GUI. I think this SO answer, with its amendments and comments, should cover it (untested): https://stackoverflow.com/a/19756925 In the meantime I found another solution. This starts FFplay with two windows (console and video): ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.FileName = "ffplay"; startInfo.Arguments = "-f lavfi testsrc2=s=vga"; Process p = Process.Start(startInfo); This starts FFplay without the console window: ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.UseShellExecute = false; startInfo.CreateNoWindow = true; startInfo.FileName = "ffplay"; startInfo.Arguments = "-f lavfi testsrc2=s=vga"; Process p = Process.Start(startInfo); Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] start FFplay without console window?
Is it possible to start FFplay (from a C# application) so that only the video window is visible, while the console window is hidden or minimized? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] zmq example
Am 28.10.2020 um 21:07 schrieb Gyan Doshi: On 28-10-2020 12:21 am, Michael Koch wrote: Hello, I'm testing this command line which is copied from the documentation: https://www.ffmpeg.org/ffmpeg-all.html#zmq_002c-azmq ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay@my=x=100" The problem is that ffplay exits after 1-2 seconds without any error message. I don't understand why. Shouldn't this command run forever? I'm not sending any commands to the zmq filter. The console output is below. Crashes here. Open a ticket at trac. have already done that, ticket #8955. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby, but not in the center. Tested with latest Windows build, 2 days old. ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=-90:pitch=45 -y out.png Input image: http://www.astro-electronic.de/equirectangular_test.png I've just tested the latest build and now it's working fine again. Thanks for fixing this! Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] zmq example
Hello, I'm testing this command line which is copied from the documentation: https://www.ffmpeg.org/ffmpeg-all.html#zmq_002c-azmq ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay@my=x=100" The problem is that ffplay exits after 1-2 seconds without any error message. I don't understand why. Shouldn't this command run forever? I'm not sending any commands to the zmq filter. The console output is below. Michael P.S. It works when I change the sizes to 200x200 and 400x200 ! C:\Users\astro\Desktop>c:\ffmpeg\ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay@my=x=100" ffplay version 2020-10-21-git-289e964873-essentials_build-www.gyan.dev Copyright (c) 2003-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband libavutil 56. 60.100 / 56. 60.100 libavcodec 58.111.101 / 58.111.101 libavformat 58. 62.100 / 58. 62.100 libavdevice 58. 11.102 / 58. 11.102 libavfilter 7. 88.100 / 7. 88.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 ++0 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0 | Parsed_color_0 |default--[100x100 1:1 yuva420p]--Parsed_overlay_4:overlay | (color) | ++ ++ | Parsed_color_1 |default--[100x100 1:1 yuva420p]--overlay@my:overlay | (color) | ++ +--+ | Parsed_nullsrc_2 |default--[200x100 1:1 yuva420p]--Parsed_zmq_3:default | (nullsrc) | +--+ +--+ Parsed_nullsrc_2:default--[200x100 1:1 yuva420p]--default| Parsed_zmq_3 |default--[200x100 1:1 yuva420p]--Parsed_overlay_4:main | (zmq) | +--+ +--+ Parsed_zmq_3:default[200x100 1:1 yuva420p]-main| Parsed_overlay_4 |default--[200x100 1:1 yuva420p]--overlay@my:main Parsed_color_0:default--[100x100 1:1 yuva420p]--overlay| (overlay) | +--+ ++ Parsed_overlay_4:default--[200x100 1:1 yuva420p]-main| overlay@my |default--[200x100 1:1 yuva420p]--out:default Parsed_color_1:default[100x100 1:1 yuva420p]--overlay| (overlay) | ++ +--+ overlay@my:default--[200x100 1:1 yuva420p]--default| out | | (buffersink) | +--+ Input #0, lavfi, from 'color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay@my=x=100': Duration: N/A, start: 0.00, bitrate: N/A Stream #0:0: Video: rawvideo (Y4[11][8] / 0x80B3459), yuva420p, 200x100 [SAR 1:1 DAR 2:1], 25 tbr, 25 tbn, 25 tbc ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] repair black frames?
Am 25.10.2020 um 16:23 schrieb Simon Roberts: Greetings all, I have just noticed that some of my video recordings have a few random black frames in them. These will be spaced out a few minutes, don't seem to have any obvious cause (though my recording system is a little Heath Robinson / Rube Goldberg, so I have some ideas) Anyway, the thought occurred to me that rather than watching, never blinking, all the material, and looking for this "manually", ffmpeg might be able to help. The solution I have in mind would probably be something that recognizes a black frame (I *think* it's "pure" black, but I don't have numbers) and replaces it with the immediately preceding or following frame). Does such a filter exist, or could such behavior be tied together out of the features that ffmpeg has? search for "blackdetect" in the documentation Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 25.10.2020 um 09:05 schrieb Michael Koch: Am 25.10.2020 um 03:02 schrieb Edward Park: Hi, After a deeper look into the quaternion multiplication, it seems to be correct. The terms are only written in a different order in the Wikipedia article. But it's a fact that the v360 rotations are broken, as can be shown by this simple test: You can use any equirectangular input image. First make a combined rotation yaw=90 and pitch=45 in the default rotation order (ypr), then rotate back pitch = -45, then rotate back yaw = -90. The output image should be the same as the input image. But it isn't. It seems to me it assumes a 45° vertical fov and 90° horizontal fov on both input and output, does that affect the behavior at all? (Or am I not understanding right) If the input and output images are specified as "equirectangular" (V360=e:e:...) then the field of view is always 360° x 180°. There are options for for input and output field of view, but these aren't used in the case of equirectangular images. Something seems to be wrong with the quaternions that were added October 7th. This is difficult stuff. A wild guess that might be worth testing: Swap the order of quaternion multiplication, 2nd and 3rd argument of multiply_quaternion() In this FFmpeg version from October 1th the v360 rotations are working correctly: C:\Users\astro\Desktop>c:\ffmpeg\ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=90:pitch=45,v360=e:e:pitch=-45,v360=e:e:yaw=-90 -y out.png ffmpeg version 4.3.1-2020-10-01-essentials_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, png_pipe, from 'equirectangular_test.png': Duration: N/A, bitrate: N/A Stream #0:0: Video: png, rgb24(pc), 2400x1200, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (png (native) -> png (native)) Press [q] to stop, [?] for help Output #0, image2, to 'out.png': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: png, rgb24, 2400x1200, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 png frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.0459x video:1851kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 25.10.2020 um 03:02 schrieb Edward Park: Hi, After a deeper look into the quaternion multiplication, it seems to be correct. The terms are only written in a different order in the Wikipedia article. But it's a fact that the v360 rotations are broken, as can be shown by this simple test: You can use any equirectangular input image. First make a combined rotation yaw=90 and pitch=45 in the default rotation order (ypr), then rotate back pitch = -45, then rotate back yaw = -90. The output image should be the same as the input image. But it isn't. It seems to me it assumes a 45° vertical fov and 90° horizontal fov on both input and output, does that affect the behavior at all? (Or am I not understanding right) If the input and output images are specified as "equirectangular" (V360=e:e:...) then the field of view is always 360° x 180°. There are options for for input and output field of view, but these aren't used in the case of equirectangular images. Something seems to be wrong with the quaternions that were added October 7th. This is difficult stuff. A wild guess that might be worth testing: Swap the order of quaternion multiplication, 2nd and 3rd argument of multiply_quaternion() Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 24.10.2020 um 11:03 schrieb Michael Koch: Am 23.10.2020 um 18:46 schrieb Michael Koch: Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby, but not in the center. Tested with latest Windows build, 2 days old. ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=-90:pitch=45 -y out.png If the rotation is only yaw or only pitch or only roll, then it's working fine. But all rotations around two or more axes fail. I'm not sure, but the problem might be in the function multiply_quaternion() in vf_v360.c Please compare the signs with this Wikipedia article: https://en.wikipedia.org/wiki/Quaternion#Hamilton_product After a deeper look into the quaternion multiplication, it seems to be correct. The terms are only written in a different order in the Wikipedia article. But it's a fact that the v360 rotations are broken, as can be shown by this simple test: You can use any equirectangular input image. First make a combined rotation yaw=90 and pitch=45 in the default rotation order (ypr), then rotate back pitch = -45, then rotate back yaw = -90. The output image should be the same as the input image. But it isn't. ffmpeg -i input.png -vf v360=e:e:yaw=90:pitch=45,v360=e:e:pitch=-45,v360=e:e:yaw=-90 -y out.png Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 23.10.2020 um 18:46 schrieb Michael Koch: Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby, but not in the center. Tested with latest Windows build, 2 days old. ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=-90:pitch=45 -y out.png If the rotation is only yaw or only pitch or only roll, then it's working fine. But all rotations around two or more axes fail. I'm not sure, but the problem might be in the function multiply_quaternion() in vf_v360.c Please compare the signs with this Wikipedia article: https://en.wikipedia.org/wiki/Quaternion#Hamilton_product Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem in v360?
Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby, but not in the center. Tested with latest Windows build, 2 days old. ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=-90:pitch=45 -y out.png If the rotation is only yaw or only pitch or only roll, then it's working fine. But all rotations around two or more axes fail. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Problem in v360?
Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby, but not in the center. Tested with latest Windows build, 2 days old. ffmpeg -i equirectangular_test.png -vf v360=e:e:yaw=-90:pitch=45 -y out.png Input image: http://www.astro-electronic.de/equirectangular_test.png Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] afreqshift
Am 21.10.2020 um 21:02 schrieb Michael Koch: Am 21.10.2020 um 20:36 schrieb Paul B Mahol: On Wed, Oct 21, 2020 at 08:14:50PM +0200, Michael Koch wrote: Hi, I'm just testing the new afreqshift filter. In my first test I did use only *.wav audio files. This test was successful. In my next test I'm using MP4 files. First I make a test video with a 5kHz tone: ffmpeg -f lavfi -i sine=f=5000:r=48000:d=5 -f lavfi -i color=black -lavfi showspectrum=legend=1 -y test.mp4 Now I try to shift the frequency down by 4kHz: ffmpeg -i test.mp4 -lavfi afreqshift=-4000,showspectrum=legend=1 -y out.mp4 The spectrum display is showing the expected 1kHz, but what I hear is 5kHz. What's wrong with my command line? Why is the output of the afreqshift filter not mapped to the output file? Something like this: ffmpeg -i test.mp4 -lavfi "asplit=2[a][b],[b]afreqshift=-4000,showspectrum=legend=1[b]" -map "[a]" -map "[b]" -y out.mp4 You ignored fact that showspectrum is just A->V filter. That did also not work, the audio output is 5kHz. But thanks for pointing me in the right direction. The asplit filter must be after the afreqshift filter. This works: ffmpeg -i test.mp4 -lavfi afreqshift=-4000,asplit[a][b];[b]showspectrum=legend=1 -map "[a]" -y out.mp4 Would it be possible to add an option for deleting all frequencies which are smaller than the shift frequency, before shifting down? Because otherwise these freqencies are shifted into the negative frequency range and can still be heard. Example: An audio signal contains normal audio frequencies in the [0...12kHz] range and ultrasonic frequencies in the [12kHz...20kHz] range. If we want to hear these ultrasonic frequencies, we must shift by -12kHz. But then the [0...12kHz] range is shifted to the [-12kHz...0] range which means we can still hear it. That could be solved by an additional steep highpass filter before the afreqshift filter. Maybe it's easier to do that in the frequency domain in the afreqshift filter? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Converting text to video for dictation
Am 20.10.2020 um 06:46 schrieb John B Morris: Hello all, typography effects based video So that one is basically what I'm looking to do with ffmpeg - turn a subtitle file (of any type) into a transparent backgrounded (?) video for use in my video editor to combine the necessary contents together - or some other file/method that has/involves time stamps/tags or "keyframes". Since I don't intend to use my voice in my videos, I "voice" them via text elements either in the center of the screen or some other places where it makes sense to do so. (I do this with my current video editor already, but it isn't very efficient, time and complexity wise, especially for videos that heavily rely on this... so hopefully ffmpeg can help with that?) Also if possible (not needed), font and color changing, and maybe some movement. Maybe subtitles in the future, but I sort of already know how to do those, however the first point would be good to know. I don't yet understand why you want to create a video with transparent background. I think that can be done, but I don't have an example ready. It seems easier to write the texts/subtitles directly into the final video. You find a few examples in chapters 2.118 and 2.119 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] find_rect, suggestion for improvement
Hello, I'd like to propose an improvement for the find_rect filter. In my application the object is quite small (10x10 pixels) and slowly moving over half of the image size. I did already narrow down the search area with the xmin, xmax, ymin, ymax options, and I did optimize the threshold value. But sometimes the algorithm is still finding false positives, because other parts of the image look similar to the object. I know that my object can't move faster than about 10 pixels from one frame to the next. My suggestion: -- Add a new option "radius" which is 0 by default. -- If radius = 0, then the behavior is the same as before. -- If radius > 0, then use the xmin, xmax, ymin, ymax values only for the first frame. -- For all subsequent frames, the search area is defined by the x,y result from the previous frame, plus and minus the radius value. -- If the algorithm doesn't find the object, it shall stay in this "object lost" state for all subsequent frames. In this case it would be nice to see a warning in the log file. That means for all frames (except the first one) the search area can be made quite small, so that the algorithm becomes much faster and the probability of finding false positives is reduced. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] DNG images
Am 11.10.2020 um 21:07 schrieb Michael Koch: Am 11.10.2020 um 20:56 schrieb Paul B Mahol: On Sun, Oct 11, 2020 at 07:37:25PM +0200, Michael Koch wrote: I tested all 4 DNG images again with the latest FFmpeg version (Gyan's build from today). I tested with and without zscale filter. All tests failed. When testing with IrfanView, all DNG input images seem to be ok. Your issues is that you do not know how to use zscale properly. DNG decoding is just fine, what is missing is colorspace stuff in swscale, for proper display. Can you please give an example for the correct zscale options? Finally I found a command line that converts DNG (from Adobe DNG converter) to JPG with a more or less acceptable result: ffmpeg -i IMG_3459.dng -vf zscale=t=linear,tonemap=gamma:param=1.85,tonemap=linear:param=64,colorlevels=rimin=0.0:gimin=0.0:bimin=0.0:rimax=0.53:gimax=1:bimax=0.57 -y out.jpg But I think everything after "zscale" is only a dirty workaround to correct errors that were made somewhere else. Especially the strong amplification by factor 64 and strong color correction doesn't look right. Please also note that the size of the output image is wrong. It's bigger than the input image and has black borders at the left and top. The console output is below. Michael C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i IMG_3459.dng -vf zscale=t=linear,tonemap=gamma:param=1.85,tonemap=linear:param=64,colorlevels=rimin=0.0:gimin=0.0:bimin=0.0:rimax=0.53:gimax=1:bimax=0.57 -y out.jpg ffmpeg version 2020-10-11-git-7ea4bcff7b-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint libavutil 56. 60.100 / 56. 60.100 libavcodec 58.111.100 / 58.111.100 libavformat 58. 62.100 / 58. 62.100 libavdevice 58. 11.102 / 58. 11.102 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [tiff @ 01d36e8cf800] Assuming black level pattern values are identical [tiff @ 01d36e8cf800] Tiled TIFF is not allowed to strip [tiff_pipe @ 01d36e8cd800] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #0, tiff_pipe, from 'IMG_3459.dng': Duration: N/A, bitrate: N/A Stream #0:0: Video: tiff, bayer_rggb16le, 5568x3708, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native)) Press [q] to stop, [?] for help [tiff @ 01d36e8d4900] Assuming black level pattern values are identical [tiff @ 01d36e8d4900] Tiled TIFF is not allowed to strip [swscaler @ 01d3706eed40] deprecated pixel format used, make sure you did set range correctly [tonemap @ 01d36e901040] Missing color space information, desaturation is disabled [tonemap @ 01d36e900240] Missing color space information, desaturation is disabled Output #0, image2, to 'out.jpg': Metadata: encoder : Lavf58.62.100 Stream #0:0: Video: mjpeg, yuvj444p(pc), 5568x3708, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.111.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/20 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.5 q=12.1 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.0185x video:853kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmp
Re: [FFmpeg-user] DNG images
Am 11.10.2020 um 20:56 schrieb Paul B Mahol: On Sun, Oct 11, 2020 at 07:37:25PM +0200, Michael Koch wrote: I tested all 4 DNG images again with the latest FFmpeg version (Gyan's build from today). I tested with and without zscale filter. All tests failed. When testing with IrfanView, all DNG input images seem to be ok. Your issues is that you do not know how to use zscale properly. DNG decoding is just fine, what is missing is colorspace stuff in swscale, for proper display. Can you please give an example for the correct zscale options? [tiff @ 019996d6fe40] non increasing IFD offset [tiff @ 019996d6fe40] is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. [tiff @ 019996d6fe40] If you want to help, upload a sample of this file to https://streams.videolan.org/upload/ and contact the ffmpeg-devel mailing list. (ffmpeg-de...@ffmpeg.org) Error while decoding stream #0:0: Invalid data found when processing input Cannot determine format of input stream 0:0 after EOF Error marking filters as finisheda As message simple says, if you want to help upload that image that fails to decode somewhere and post link to upload here. The link was already in my last message. www.astro-electronic.de/Pentax_K5.DNG Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Am 29.09.2020 um 22:54 schrieb Michael Koch: Hello all, I've programmed a C# workaround for stabilization of 360° videos. The procedure is as follows: 1. FFmpeg: From each frame of the equirectangular input video, extract two small images which are 90° apart in the input video. I call them A and B images. 2. C# code: Analyze the x and y image shift from subsequent A and B images. Calculate how the equirectangular frames must be rotated (yaw, pitch, roll) to compensate the image shifts. This part wasn't easy. Two rotation matrices and one matrix multiplication are required. Write the results to a *.cmd file. 3. FFmpeg: Read the *.cmd file and apply the rotations with the v360 filter. The output video is stabilized. For details and source code please have a look at chapter 2.78 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf If anyone wants to implement this in FFmpeg, please feel free to do it. I've written and tested an improved version for 360° stabilization, it's in chapter 2.79. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] DNG images
I tested all 4 DNG images again with the latest FFmpeg version (Gyan's build from today). I tested with and without zscale filter. All tests failed. When testing with IrfanView, all DNG input images seem to be ok. Test 1: Images from https://drive.google.com/drive/folders/1u5m7aVAFPpEsL4YtDVsfSpfcve9PFG4m c:\ffmpeg\ffmpeg -i sample_r0.dng -y out.jpg The image is converted without error message, but the result is much too dark. c:\ffmpeg\ffmpeg -i sample_r0.dng -vf zscale -y out.jpg Error message: "code 3074: no path between colorspaces" The full console output is copied below. Test 2: This is a RAW image from a Canon 6D which was converted to DNG with Adobe DNG Converter V12.4: www.astro-electronic.de/IMG_3459.dng c:\ffmpeg\ffmpeg -i IMG_3459.dng -y out.jpg The image is converted without error message, but the result is much too dark. c:\ffmpeg\ffmpeg -i IMG_3459.dng -vf zscale -y out.jpg Error message: "code 3074: no path between colorspaces" The full console output is copied below. Test 3: This is a RAW image from a Canon 5D-MK4 which was converted to DNG with Adobe DNG Converter V12.4. The problem is exactly the same as in test 2. Test 4: This is a DNG image that was directly written by a Pentax K5 camera. www.astro-electronic.de/Pentax_K5.DNG c:\ffmpeg\ffmpeg -i Pentax_K5.DNG -y out.jpg Error message: "Error while decoding stream #0:0: Invalid data found when processing input" The full console output is copied below. c:\ffmpeg\ffmpeg -i Pentax_K5.DNG -vf zscale -y out.jpg Same error message as above. Michael C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i sample_r0.dng -vf zscale -y out.jpg ffmpeg version 2020-10-11-git-7ea4bcff7b-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint libavutil 56. 60.100 / 56. 60.100 libavcodec 58.111.100 / 58.111.100 libavformat 58. 62.100 / 58. 62.100 libavdevice 58. 11.102 / 58. 11.102 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [tiff @ 0234bf57f780] Assuming black level pattern values are identical [tiff_pipe @ 0234bf57d700] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #0, tiff_pipe, from 'sample_r0.dng': Duration: N/A, bitrate: N/A Stream #0:0: Video: tiff, bayer_rggb16le, 6016x3200, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native)) Press [q] to stop, [?] for help [tiff @ 0234bf5900c0] Assuming black level pattern values are identical code 3074: no path between colorspaces Error while filtering: Generic error in an external library Failed to inject frame into filter network: Generic error in an external library Error while processing the decoded data for stream #0:0 Conversion failed! C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i IMG_3459.dng -vf zscale -y out.jpg ffmpeg version 2020-10-11-git-7ea4bcff7b-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
Re: [FFmpeg-user] Glossary: Nyquist
Am 03.10.2020 um 22:43 schrieb Mark Filipak (ffmpeg): On 10/03/2020 02:05 PM, Anatoly wrote: On Sat, 3 Oct 2020 11:05:03 -0400 -snip- You should learn than what spectrum is. Oh, please. Be easy with me. I'm just a simple electrical engineer. And how any complex waveform (with it's "information density") may be represented as a sum of many simple sinewaves. Ah, now that would be a Taylor series, no? Joseph Fourier just turned around in his grave... Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Am 03.10.2020 um 13:25 schrieb Paul B Mahol: On Sat, Oct 03, 2020 at 08:27:20AM +0200, Michael Koch wrote: Use correct player like mpv, which does not ignore color_trc. A player? The output is a jpg image and it's too dark. Yes, player, ffmpeg is not correct in conversion. Because swscale is old and ignores color_trc metadata that is required for correct display. Use zscale instead for converting pixel formats. Can you please give an example how to convert a DNG image to a JPG image with FFmpeg? I did try ffmpeg -i sample_r0.dng -vf zscale -y out.jpg but it gives an error message. The input image is from https://drive.google.com/drive/folders/1u5m7aVAFPpEsL4YtDVsfSpfcve9PFG4m and IrfanView has no problem to open this image. Then join IrfanView mailing list. Why should I? IrfanView has no problem. Every single DNG file you posted is invalid in some part. Adobe is the creator of the DNG format and it sounds quite unlikely that their own DNG Converter produces invalid DNG files. I tested that the files can be opened with IrfanView, Windows Media Player, Fitswork, 3D LUT Creator and GIMP with Darktable plugin. I saw that you fixed it (thanks for that!) and will test it soon. The images from the above link are a different thing, as I don't know how they were created. I agree that they might be invalid. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Use correct player like mpv, which does not ignore color_trc. A player? The output is a jpg image and it's too dark. Yes, player, ffmpeg is not correct in conversion. Because swscale is old and ignores color_trc metadata that is required for correct display. Use zscale instead for converting pixel formats. Can you please give an example how to convert a DNG image to a JPG image with FFmpeg? I did try ffmpeg -i sample_r0.dng -vf zscale -y out.jpg but it gives an error message. The input image is from https://drive.google.com/drive/folders/1u5m7aVAFPpEsL4YtDVsfSpfcve9PFG4m and IrfanView has no problem to open this image. Michael C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i sample_r0.dng -vf zscale -y out.jpg ffmpeg version 2020-09-20-git-ef29e5bf42-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libwavpack --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint libavutil 56. 59.100 / 56. 59.100 libavcodec 58.106.100 / 58.106.100 libavformat 58. 58.100 / 58. 58.100 libavdevice 58. 11.102 / 58. 11.102 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [tiff @ 025f5dbdf680] Assuming black level pattern values are identical [mjpeg @ 025f5dbe4ec0] mjpeg_decode_dc: bad vlc: 0:0 (025f5dbe5588) Last message repeated 1 times [tiff_pipe @ 025f5dbdd640] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #0, tiff_pipe, from 'sample_r0.dng': Duration: N/A, bitrate: N/A Stream #0:0: Video: tiff, bayer_rggb16le, 6016x3200, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native)) Press [q] to stop, [?] for help [tiff @ 025f5dbefe40] Assuming black level pattern values are identical [mjpeg @ 025f5dc15180] mjpeg_decode_dc: bad vlc: 0:0 (025f5dc38248) Last message repeated 1 times code 3074: no path between colorspaces Error while filtering: Generic error in an external library Failed to inject frame into filter network: Generic error in an external library Error while processing the decoded data for stream #0:0 Conversion failed! ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Am 02.10.2020 um 22:01 schrieb Paul B Mahol: Use correct player like mpv, which does not ignore color_trc. A player? The output is a jpg image and it's too dark. Yes, player, ffmpeg is not correct in conversion. Because swscale is old and ignores color_trc metadata that is required for correct display. Use zscale instead for converting pixel formats. Can you please give an example how to convert a DNG image to a JPG image with FFmpeg? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Am 02.10.2020 um 10:10 schrieb Paul B Mahol: On Thu, Oct 01, 2020 at 11:40:57PM +0200, Michael Koch wrote: Am 01.10.2020 um 22:11 schrieb Paul B Mahol: On Tue, Sep 29, 2020 at 10:54:54PM +0200, Michael Koch wrote: Hello all, I've programmed a C# workaround for stabilization of 360° videos. The procedure is as follows: 1. FFmpeg: From each frame of the equirectangular input video, extract two small images which are 90° apart in the input video. I call them A and B images. 2. C# code: Analyze the x and y image shift from subsequent A and B images. Calculate how the equirectangular frames must be rotated (yaw, pitch, roll) to compensate the image shifts. This part wasn't easy. Two rotation matrices and one matrix multiplication are required. Write the results to a *.cmd file. 3. FFmpeg: Read the *.cmd file and apply the rotations with the v360 filter. The output video is stabilized. For details and source code please have a look at chapter 2.78 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf If anyone wants to implement this in FFmpeg, please feel free to do it. Better upload DNG files that do not decode with FFmpeg. In this message http://ffmpeg.org/pipermail/ffmpeg-user/2020-August/049681.html you find a link to many DNG images which FFmpeg can't decode correctly. There is no error message, but the result is much too dark with low saturation. Use correct player like mpv, which does not ignore color_trc. A player? The output is a jpg image and it's too dark. ffmpeg -i input.dng output.jpg I did convert a RAW image from a Canon 6D to DNG with Adobe DNG Converter V12.4. FFmpeg is unable to decode this DNG image. See this message for details: http://ffmpeg.org/pipermail/ffmpeg-user/2020-August/049738.html You can download the DNG image here (I will delete it from my webspace in a few days): www.astro-electronic.de/IMG_3459.dng I did also try a RAW image from a Canon 5D-MK4 with the same negative result. A friend gave me a DNG image that was written by his Pentax K5 camera. Same negative result. Summary: I did try DNG images from 4 different sources and in 4 of 4 cases In my testcases, 30 out of 30 DNGs decoded just fine. Did any of your 30 DNGs come from Adobe DNG converter V12.4, or from a Pentax K5 camera? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] V360 stabilization
Am 01.10.2020 um 22:11 schrieb Paul B Mahol: On Tue, Sep 29, 2020 at 10:54:54PM +0200, Michael Koch wrote: Hello all, I've programmed a C# workaround for stabilization of 360° videos. The procedure is as follows: 1. FFmpeg: From each frame of the equirectangular input video, extract two small images which are 90° apart in the input video. I call them A and B images. 2. C# code: Analyze the x and y image shift from subsequent A and B images. Calculate how the equirectangular frames must be rotated (yaw, pitch, roll) to compensate the image shifts. This part wasn't easy. Two rotation matrices and one matrix multiplication are required. Write the results to a *.cmd file. 3. FFmpeg: Read the *.cmd file and apply the rotations with the v360 filter. The output video is stabilized. For details and source code please have a look at chapter 2.78 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf If anyone wants to implement this in FFmpeg, please feel free to do it. Better upload DNG files that do not decode with FFmpeg. In this message http://ffmpeg.org/pipermail/ffmpeg-user/2020-August/049681.html you find a link to many DNG images which FFmpeg can't decode correctly. There is no error message, but the result is much too dark with low saturation. I did convert a RAW image from a Canon 6D to DNG with Adobe DNG Converter V12.4. FFmpeg is unable to decode this DNG image. See this message for details: http://ffmpeg.org/pipermail/ffmpeg-user/2020-August/049738.html You can download the DNG image here (I will delete it from my webspace in a few days): www.astro-electronic.de/IMG_3459.dng I did also try a RAW image from a Canon 5D-MK4 with the same negative result. A friend gave me a DNG image that was written by his Pentax K5 camera. Same negative result. Summary: I did try DNG images from 4 different sources and in 4 of 4 cases FFmpeg failed. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] slow motion by changing frame rate from 60 to 30
Am 01.10.2020 um 16:57 schrieb Cristian Secară: I want to make a short .mp4 clip filmed in 1080p/60 format, then change somehow the playing fame rate to 30Hz so that the playing speed becomes twice slower. Audio is not important (may be dropped completely). As far as I know (?), a "simple" frame rate change will try to preserve the playing speed, so when changing from 60Hz to 30Hz, it will drop half of the movie. At the same time, a "simple" slow motion processing will try to keep the original frame rate, so in this case it will interpolate the transitions or something, while keeping the frame rate still at 60Hz. What options are available for preserving all frames "as is" and just slowing down the playing speed ? It's described here: https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] HIGHPASS FILTER AND ID£ METADATA
Am 01.10.2020 um 14:06 schrieb Michael Koch:
Am 01.10.2020 um 13:25 schrieb Marco Mircoli:
Hello',
I'm a newbie.
Just bought a php script that use ffmpeg.
it converts to mp3/96Kbps all media uploaded in a unique format.
this is the line, and now it normalizes to R128 (thanks Moritz)
$shell = shell_exec("$ffmpeg_b -i $audio_file_full_path -map
0:a:0 -af
loudnorm -b:a 96k $audio_output_mp3 2>&1");
I'm wondering if it is possible to include a simple hi-pass filter
(highest
db per octave @ 70Hz)
add highpass=70, before loudnorm
This filter attenuated 6dB per octave. If you need higher attenuation,
you can use several highpass filters, for example
highpass=70,highpass=70,highpass=70,loudnorm
Correction: The filter has 12dB per octave.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] HIGHPASS FILTER AND ID£ METADATA
Am 01.10.2020 um 13:25 schrieb Marco Mircoli:
Hello',
I'm a newbie.
Just bought a php script that use ffmpeg.
it converts to mp3/96Kbps all media uploaded in a unique format.
this is the line, and now it normalizes to R128 (thanks Moritz)
$shell = shell_exec("$ffmpeg_b -i $audio_file_full_path -map 0:a:0 -af
loudnorm -b:a 96k $audio_output_mp3 2>&1");
I'm wondering if it is possible to include a simple hi-pass filter (highest
db per octave @ 70Hz)
add highpass=70, before loudnorm
This filter attenuated 6dB per octave. If you need higher attenuation,
you can use several highpass filters, for example
highpass=70,highpass=70,highpass=70,loudnorm
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] V360 stabilization
Hello all, I've programmed a C# workaround for stabilization of 360° videos. The procedure is as follows: 1. FFmpeg: From each frame of the equirectangular input video, extract two small images which are 90° apart in the input video. I call them A and B images. 2. C# code: Analyze the x and y image shift from subsequent A and B images. Calculate how the equirectangular frames must be rotated (yaw, pitch, roll) to compensate the image shifts. This part wasn't easy. Two rotation matrices and one matrix multiplication are required. Write the results to a *.cmd file. 3. FFmpeg: Read the *.cmd file and apply the rotations with the v360 filter. The output video is stabilized. For details and source code please have a look at chapter 2.78 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf If anyone wants to implement this in FFmpeg, please feel free to do it. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] should I shoot the dog?
Am 29.09.2020 um 16:26 schrieb Mark Filipak (ffmpeg): On 09/29/2020 09:37 AM, Michael Koch wrote: Am 29.09.2020 um 14:58 schrieb Mark Filipak (ffmpeg): On 09/29/2020 04:06 AM, Michael Koch wrote: Am 29.09.2020 um 04:28 schrieb Mark Filipak (ffmpeg): I just want to understand the frame structures that ffmpeg creates, and that ffmpeg uses in processing and filtering. Are Y, Cb, Cr separate buffers? That would be logical. Or are the Y, Cb, Cr values combined and organized similarly to macroblocks? I've found some code that supports that. Or are the Y, Cb, Cr values thrown together, pixel-by-pixel. That would be logical, too. As far as I understood it, that depends on the pixel format. For example there are "packed" pixel formats rgb24, bgr24, argb, rgba, abgr, bgra,rgb48be, rgb48le, bgr48be, bgr48le. And there are "planar" pixel formats gbrp, bgrp16be, bgrp16le. Hi Michael, "Packed" and "planar", eh? What evidence do you have? ...Share the candy! As far as I know, this is not described in the official documentation. You can find it for example here: https://video.stackexchange.com/questions/16374/ffmpeg-pixel-format-definitions Thanks for that. It saved me some time. ...So, what does "planar" mean? What does "packed" mean? Here is an example for a very small image with 3 x 2 pixels. In (packed) RGB24 format: RGBRGBRGBRGBRGBRGB In (planar) GBRP format: GGBBRR Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] should I shoot the dog?
Am 29.09.2020 um 14:58 schrieb Mark Filipak (ffmpeg): On 09/29/2020 04:06 AM, Michael Koch wrote: Am 29.09.2020 um 04:28 schrieb Mark Filipak (ffmpeg): I just want to understand the frame structures that ffmpeg creates, and that ffmpeg uses in processing and filtering. Are Y, Cb, Cr separate buffers? That would be logical. Or are the Y, Cb, Cr values combined and organized similarly to macroblocks? I've found some code that supports that. Or are the Y, Cb, Cr values thrown together, pixel-by-pixel. That would be logical, too. As far as I understood it, that depends on the pixel format. For example there are "packed" pixel formats rgb24, bgr24, argb, rgba, abgr, bgra,rgb48be, rgb48le, bgr48be, bgr48le. And there are "planar" pixel formats gbrp, bgrp16be, bgrp16le. Hi Michael, "Packed" and "planar", eh? What evidence do you have? ...Share the candy! As far as I know, this is not described in the official documentation. You can find it for example here: https://video.stackexchange.com/questions/16374/ffmpeg-pixel-format-definitions Now, I'm not talking about streams. I'm talking about after decoding. I'm talking about the buffers. I would think that a single, consistent format would be used. There is no single consistent format used internally. See Gyan's answer here: http://ffmpeg.org/pipermail/ffmpeg-user/2020-September/050031.html Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] should I shoot the dog?
Am 29.09.2020 um 04:28 schrieb Mark Filipak (ffmpeg): I just want to understand the frame structures that ffmpeg creates, and that ffmpeg uses in processing and filtering. Are Y, Cb, Cr separate buffers? That would be logical. Or are the Y, Cb, Cr values combined and organized similarly to macroblocks? I've found some code that supports that. Or are the Y, Cb, Cr values thrown together, pixel-by-pixel. That would be logical, too. As far as I understood it, that depends on the pixel format. For example there are "packed" pixel formats rgb24, bgr24, argb, rgba, abgr, bgra,rgb48be, rgb48le, bgr48be, bgr48le. And there are "planar" pixel formats gbrp, bgrp16be, bgrp16le. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] cover_rect without find_rect?
Am 26.09.2020 um 13:02 schrieb Michael Koch: Hello, is it possible to use the cover_rect filter without using the find_rect filter? I don't want to use find_rect because I already know the coordinates and size of the object to be covered. Or is there another filter for covering an object with "blur" mode, using interpolation from the surrounding pixels? Found the solution myself: delogo filter Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] cover_rect without find_rect?
Hello, is it possible to use the cover_rect filter without using the find_rect filter? I don't want to use find_rect because I already know the coordinates and size of the object to be covered. Or is there another filter for covering an object with "blur" mode, using interpolation from the surrounding pixels? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] chroma colour
Am 24.09.2020 um 14:52 schrieb Paul Bourke: Also, I really dunno why people keep using remap filter with its only available neighbour pixel interpolator. Yeah, not ideal. I don't use it for images, I have my own solution for that with supersampling antialising. But for movie conversion, what is the alternative? If it can be done with the v360 filter, then this is the recommended alternative. For other transformations, I don't know. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] chroma colour
Am 24.09.2020 um 14:30 schrieb Paul Bourke: Hmmm ffmpeg -i Ajanta_cave26b.jpg -i x.pgm -i y.pgm -lavfi remap=fill=green a.png I get [Parsed_remap_0 @ 0x7fd6cac05200] Option 'fill' not found [AVFilterGraph @ 0x7fd6cae1c5c0] Error initializing filter 'remap' with args 'fill=green' Error initializing complex filters. Option not found ffmpeg 4.2.2 too old, get a newer version Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] chroma colour
Am 24.09.2020 um 13:50 schrieb Paul Bourke: How do I change the colour actually used as the chromakey colour? I am creating remap filters to do various image mappings and would like undefined pixels to be black rather than green. Apologies in advance if I simply didn't search the documentation sufficiently well. Use the "fill" option of the remap filter. There is an example in chapter 2.66 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Create a 10-bit VLog test video
Am 20.09.2020 um 15:19 schrieb Michael Koch: Am 19.09.2020 um 17:01 schrieb Paul B Mahol: On Sat, Sep 19, 2020 at 12:10 PM Michael Koch wrote: Hello all, I want to create a 10-bit VLog test video which contains 18 levels of gray, according to Panasonic's VLog curve. The curve is documented here: https://pro-av.panasonic.net/en/cinema_camera_varicam_eva/support/pdf/VARICAM_V-Log_V-Gamut.pdf I want the leftmost bar to be black (128) and the other 17 bars are for -8 to +8 stops, so that the rightmost bar is at level 1023. I'm using this command line and the console output is copied below: ffmpeg -f lavfi -i nullsrc=s=svga,format=gray16 -lavfi geq=lum='st(0,trunc(18*X/W));64*(128*eq(ld(0),0)+132*eq(ld(0),1)+136*eq(ld(0),2)+144*eq(ld(0),3)+160*eq(ld(0),4)+192*eq(ld(0),5)+240*eq(ld(0),6)+298*eq(ld(0),7)+363*eq(ld(0),8)+433*eq(ld(0),9)+505*eq(ld(0),10)+578*eq(ld(0),11)+652*eq(ld(0),12)+726*eq(ld(0),13)+800*eq(ld(0),14)+874*eq(ld(0),15)+949*eq(ld(0),16)+1023*eq(ld(0),17))' -pix_fmt yuv444p10le -crf 10 -c:v h264 -t 5 -y VLog_10bit.mov The video looks perfect when played with FFplay. The leftmost bars are indistinguishable on a 8-bit monitor because the levels are too close together, but the rightmost bars look as expected. However when I play the same video with VLC, the two brightest bars at the right side have the same shade of gray. I don't understand why. Is this a problem in my video, or is it a problem in VLC? When I extraxt a 16-bit PNG image from the video, this looks as expected with 18 levels of gray. ffmpeg -i VLog_10bit.mov -frames 1 -y out.png Unrelated: I did try to add the oscilloscope filter at the end of the filter chain, but it seems it doesn't work with 16-bit data. There should be a warning or an error message. oscilloscope=tw=1:s=1 That happened only with gray>8 formats and have been fixed already. Thanks, oscilloscope works fine now. Do you have any idea why the brightest bar looks correct in FFplay and wrong in VLC? Is the problem reproducible on other computers? I've solved the problem. If "-color_range pc" is added to the command line, the video plays fine in FFplay and also in VLC. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Create a 10-bit VLog test video
Am 19.09.2020 um 15:06 schrieb Mick Finn: Does vlc even support 10 bit playback on supported monitors? I have 10 bit calibrated monitor and don’t notice the same difference with vlc as with say resolve I don't have a 10-bit monitor. I'm assuming that FFplay or VLC do automatically convert 10-bit videos to 8-bit. The question is: Why do the two brightest bars look correct when played with FFplay, but wrong when played with VLC? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Create a 10-bit VLog test video
Am 19.09.2020 um 17:01 schrieb Paul B Mahol: On Sat, Sep 19, 2020 at 12:10 PM Michael Koch wrote: Hello all, I want to create a 10-bit VLog test video which contains 18 levels of gray, according to Panasonic's VLog curve. The curve is documented here: https://pro-av.panasonic.net/en/cinema_camera_varicam_eva/support/pdf/VARICAM_V-Log_V-Gamut.pdf I want the leftmost bar to be black (128) and the other 17 bars are for -8 to +8 stops, so that the rightmost bar is at level 1023. I'm using this command line and the console output is copied below: ffmpeg -f lavfi -i nullsrc=s=svga,format=gray16 -lavfi geq=lum='st(0,trunc(18*X/W));64*(128*eq(ld(0),0)+132*eq(ld(0),1)+136*eq(ld(0),2)+144*eq(ld(0),3)+160*eq(ld(0),4)+192*eq(ld(0),5)+240*eq(ld(0),6)+298*eq(ld(0),7)+363*eq(ld(0),8)+433*eq(ld(0),9)+505*eq(ld(0),10)+578*eq(ld(0),11)+652*eq(ld(0),12)+726*eq(ld(0),13)+800*eq(ld(0),14)+874*eq(ld(0),15)+949*eq(ld(0),16)+1023*eq(ld(0),17))' -pix_fmt yuv444p10le -crf 10 -c:v h264 -t 5 -y VLog_10bit.mov The video looks perfect when played with FFplay. The leftmost bars are indistinguishable on a 8-bit monitor because the levels are too close together, but the rightmost bars look as expected. However when I play the same video with VLC, the two brightest bars at the right side have the same shade of gray. I don't understand why. Is this a problem in my video, or is it a problem in VLC? When I extraxt a 16-bit PNG image from the video, this looks as expected with 18 levels of gray. ffmpeg -i VLog_10bit.mov -frames 1 -y out.png Unrelated: I did try to add the oscilloscope filter at the end of the filter chain, but it seems it doesn't work with 16-bit data. There should be a warning or an error message. oscilloscope=tw=1:s=1 That happened only with gray>8 formats and have been fixed already. Thanks, oscilloscope works fine now. Do you have any idea why the brightest bar looks correct in FFplay and wrong in VLC? Is the problem reproducible on other computers? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Create a 10-bit VLog test video
Hello all, I want to create a 10-bit VLog test video which contains 18 levels of gray, according to Panasonic's VLog curve. The curve is documented here: https://pro-av.panasonic.net/en/cinema_camera_varicam_eva/support/pdf/VARICAM_V-Log_V-Gamut.pdf I want the leftmost bar to be black (128) and the other 17 bars are for -8 to +8 stops, so that the rightmost bar is at level 1023. I'm using this command line and the console output is copied below: ffmpeg -f lavfi -i nullsrc=s=svga,format=gray16 -lavfi geq=lum='st(0,trunc(18*X/W));64*(128*eq(ld(0),0)+132*eq(ld(0),1)+136*eq(ld(0),2)+144*eq(ld(0),3)+160*eq(ld(0),4)+192*eq(ld(0),5)+240*eq(ld(0),6)+298*eq(ld(0),7)+363*eq(ld(0),8)+433*eq(ld(0),9)+505*eq(ld(0),10)+578*eq(ld(0),11)+652*eq(ld(0),12)+726*eq(ld(0),13)+800*eq(ld(0),14)+874*eq(ld(0),15)+949*eq(ld(0),16)+1023*eq(ld(0),17))' -pix_fmt yuv444p10le -crf 10 -c:v h264 -t 5 -y VLog_10bit.mov The video looks perfect when played with FFplay. The leftmost bars are indistinguishable on a 8-bit monitor because the levels are too close together, but the rightmost bars look as expected. However when I play the same video with VLC, the two brightest bars at the right side have the same shade of gray. I don't understand why. Is this a problem in my video, or is it a problem in VLC? When I extraxt a 16-bit PNG image from the video, this looks as expected with 18 levels of gray. ffmpeg -i VLog_10bit.mov -frames 1 -y out.png Unrelated: I did try to add the oscilloscope filter at the end of the filter chain, but it seems it doesn't work with 16-bit data. There should be a warning or an error message. oscilloscope=tw=1:s=1 Michael C:\Users\astro\Desktop\Test_10-bit>c:\ffmpeg\ffmpeg -f lavfi -i nullsrc=s=svga,format=gray16 -lavfi geq=lum='st(0,trunc(18*X/W));64*(128*eq(ld(0),0)+132*eq(ld(0),1)+136*eq(ld(0),2)+144*eq(ld(0),3)+160*eq(ld(0),4)+192*eq(ld(0),5)+240*eq(ld(0),6)+298*eq(ld(0),7)+363*eq(ld(0),8)+433*eq(ld(0),9)+505*eq(ld(0),10)+578*eq(ld(0),11)+652*eq(ld(0),12)+726*eq(ld(0),13)+800*eq(ld(0),14)+874*eq(ld(0),15)+949*eq(ld(0),16)+1023*eq(ld(0),17))' -pix_fmt yuv444p10le -crf 10 -c:v h264 -t 10 -y VLog_10bit.mov ffmpeg version N-99135-gaa8935b395-2020-09-13-gyan-beta2 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev1, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e --enable-libsvtav1 --enable-avisynth --enable-libopenmpt --enable-chromaprint --enable-frei0r --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfribidi --enable-libgme --enable-libilbc --enable-libmodplug --enable-librubberband --enable-libssh --enable-libzmq --enable-libzvbi --enable-ladspa --enable-libglslang --enable-vulkan --disable-w32threads --disable-autodetect --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-amf --enable-static libavutil 56. 58.100 / 56. 58.100 libavcodec 58.106.100 / 58.106.100 libavformat 58. 54.100 / 58. 54.100 libavdevice 58. 11.101 / 58. 11.101 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 Input #0, lavfi, from 'nullsrc=s=svga,format=gray16': Duration: N/A, start: 0.00, bitrate: N/A Stream #0:0: Video: rawvideo (Y1[0][16] / 0x10003159), gray16le, 800x600 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 (rawvideo) -> geq geq -> Stream #0:0 (libx264) Press [q] to stop, [?] for help [libx264 @ 018100489740] using SAR=1/1 [libx264 @ 018100489740] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 018100489740] profile High 4:4:4 Predictive, level 3.1, 4:4:4, 10-bit [libx264 @ 018100489740] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
Re: [FFmpeg-user] Question about -noauto_conversion_filters
Am 14.09.2020 um 13:24 schrieb Gyan Doshi: On 14-09-2020 03:41 pm, Michael Koch wrote: Am 14.09.2020 um 11:26 schrieb Gyan Doshi: On 14-09-2020 02:47 pm, Michael Koch wrote: ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf format=rgb48le,lut3d="VLog_to_V709.cube",format=yuv422p10le -noauto_conversion_filters -pix_fmt yuv422p10le -c:v h264 -y out.mov Format conversion is carried out by libswscale and auto conversion inserts the scale filter. So, ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf scale,format=rgb48le,lut3d="VLog_to_V709.cube",scale -noauto_conversion_filters -pix_fmt yuv422p10le -c:v h264 -y out.mov The final format filter is redundant with -pix_fmt, so I removed one of them. Thank you, with "scale" it works fine. Although it's hard to understand what "scale" (without any options) is actually doing. I have another question. Is this the correct and easiest way to make a 10-bit test video? -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le In the documentation is written "The |testsrc2|source is similar to testsrc, but supports more pixel formats instead of just |rgb24|. This allows using it as an input for other tests without requiring a format conversion." ^ But in my above command, I think "format=yuv422p10le" is a format conversion. Each filter presents a list of input formats they can work with and a list of output formats they can directly generate. The framework inspects adjacent filters and sets a compatible common format for the outputs and inputs when possible. If not, it sets one of the available output formats for the preceding filter and one from input formats for the following filter and inserts a scale filter to convert between those. This process is format negotiation. The format filter doesn't carry out the conversion itself - it inserts scale which in turn invokes libswscale. scale without any args defaults to the source W and H. But for pixel formats, its output format is constrained by the following format filter. That triggers a format conversion by libswscale. Thanks for good explanation! Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Question about -noauto_conversion_filters
Am 14.09.2020 um 11:26 schrieb Gyan Doshi: On 14-09-2020 02:47 pm, Michael Koch wrote: ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf format=rgb48le,lut3d="VLog_to_V709.cube",format=yuv422p10le -noauto_conversion_filters -pix_fmt yuv422p10le -c:v h264 -y out.mov Format conversion is carried out by libswscale and auto conversion inserts the scale filter. So, ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf scale,format=rgb48le,lut3d="VLog_to_V709.cube",scale -noauto_conversion_filters -pix_fmt yuv422p10le -c:v h264 -y out.mov The final format filter is redundant with -pix_fmt, so I removed one of them. Thank you, with "scale" it works fine. Although it's hard to understand what "scale" (without any options) is actually doing. I have another question. Is this the correct and easiest way to make a 10-bit test video? -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le In the documentation is written "The |testsrc2|source is similar to testsrc, but supports more pixel formats instead of just |rgb24|. This allows using it as an input for other tests without requiring a format conversion." ^ But in my above command, I think "format=yuv422p10le" is a format conversion. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Question about -noauto_conversion_filters
Am 13.09.2020 um 20:18 schrieb Michael Koch: Hello all, I'm just testing the new -noauto_conversion_filters option. As the first step, I'm running this command line (without the new option): ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf lut3d="VLog_to_V709.cube" -pix_fmt yuv422p10le -c:v h264 -y out.mov This is running fine and here is the console output: C:\Users\astro\Desktop\Format_Test>c:\ffmpeg2\ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf lut3d="VLog_to_V709.cube" -pix_fmt yuv422p10le -c:v h264 -y out.mov ffmpeg version N-99135-gaa8935b395-2020-09-13-gyan-beta2 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev1, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e --enable-libsvtav1 --enable-avisynth --enable-libopenmpt --enable-chromaprint --enable-frei0r --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfribidi --enable-libgme --enable-libilbc --enable-libmodplug --enable-librubberband --enable-libssh --enable-libzmq --enable-libzvbi --enable-ladspa --enable-libglslang --enable-vulkan --disable-w32threads --disable-autodetect --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-amf --enable-static libavutil 56. 58.100 / 56. 58.100 libavcodec 58.106.100 / 58.106.100 libavformat 58. 54.100 / 58. 54.100 libavdevice 58. 11.101 / 58. 11.101 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [Parsed_testsrc2_0 @ 017dee1d1e80] size:800x600 rate:25/1 duration:5.00 sar:1/1 Input #0, lavfi, from 'testsrc2=s=svga:d=5,format=yuv422p10le': Duration: N/A, start: 0.00, bitrate: N/A Stream #0:0: Video: rawvideo, 1 reference frame (Y3[10][10] / 0xA0A3359), yuv422p10le, 800x600 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc Matched encoder 'libx264' for codec 'h264'. Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Press [q] to stop, [?] for help [graph 0 input from stream 0:0 @ 017df0369580] w:800 h:600 pixfmt:yuv422p10le tb:1/25 fr:25/1 sar:1/1 [auto_scaler_0 @ 017dee220180] w:iw h:ih flags:'bicubic' interl:0 [Parsed_lut3d_0 @ 017dee2a7540] auto-inserting filter 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0' and the filter 'Parsed_lut3d_0' [auto_scaler_1 @ 017dee220280] w:iw h:ih flags:'bicubic' interl:0 [format @ 017dee21f880] auto-inserting filter 'auto_scaler_1' between the filter 'Parsed_lut3d_0' and the filter 'format' [auto_scaler_0 @ 017dee220180] w:800 h:600 fmt:yuv422p10le sar:1/1 -> w:800 h:600 fmt:rgb48le sar:1/1 flags:0x4 [auto_scaler_1 @ 017dee220280] w:800 h:600 fmt:rgb48le sar:1/1 -> w:800 h:600 fmt:yuv422p10le sar:1/1 flags:0x4 [libx264 @ 017dee1d8300] using SAR=1/1 [libx264 @ 017dee1d8300] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 017dee1d8300] profile High 4:2:2, level 3.1, 4:2:2, 10-bit [libx264 @ 017dee1d8300] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=81 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mov, to 'out.mov': Metadata: encoder : Lavf58.54.100 Stream #0:0: Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv422p10le, 800x600 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc58.106.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer si
[FFmpeg-user] Question about -noauto_conversion_filters
Hello all, I'm just testing the new -noauto_conversion_filters option. As the first step, I'm running this command line (without the new option): ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf lut3d="VLog_to_V709.cube" -pix_fmt yuv422p10le -c:v h264 -y out.mov This is running fine and here is the console output: C:\Users\astro\Desktop\Format_Test>c:\ffmpeg2\ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le -vf lut3d="VLog_to_V709.cube" -pix_fmt yuv422p10le -c:v h264 -y out.mov ffmpeg version N-99135-gaa8935b395-2020-09-13-gyan-beta2 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (Rev1, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e --enable-libsvtav1 --enable-avisynth --enable-libopenmpt --enable-chromaprint --enable-frei0r --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfribidi --enable-libgme --enable-libilbc --enable-libmodplug --enable-librubberband --enable-libssh --enable-libzmq --enable-libzvbi --enable-ladspa --enable-libglslang --enable-vulkan --disable-w32threads --disable-autodetect --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-amf --enable-static libavutil 56. 58.100 / 56. 58.100 libavcodec 58.106.100 / 58.106.100 libavformat 58. 54.100 / 58. 54.100 libavdevice 58. 11.101 / 58. 11.101 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [Parsed_testsrc2_0 @ 017dee1d1e80] size:800x600 rate:25/1 duration:5.00 sar:1/1 Input #0, lavfi, from 'testsrc2=s=svga:d=5,format=yuv422p10le': Duration: N/A, start: 0.00, bitrate: N/A Stream #0:0: Video: rawvideo, 1 reference frame (Y3[10][10] / 0xA0A3359), yuv422p10le, 800x600 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc Matched encoder 'libx264' for codec 'h264'. Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Press [q] to stop, [?] for help [graph 0 input from stream 0:0 @ 017df0369580] w:800 h:600 pixfmt:yuv422p10le tb:1/25 fr:25/1 sar:1/1 [auto_scaler_0 @ 017dee220180] w:iw h:ih flags:'bicubic' interl:0 [Parsed_lut3d_0 @ 017dee2a7540] auto-inserting filter 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0' and the filter 'Parsed_lut3d_0' [auto_scaler_1 @ 017dee220280] w:iw h:ih flags:'bicubic' interl:0 [format @ 017dee21f880] auto-inserting filter 'auto_scaler_1' between the filter 'Parsed_lut3d_0' and the filter 'format' [auto_scaler_0 @ 017dee220180] w:800 h:600 fmt:yuv422p10le sar:1/1 -> w:800 h:600 fmt:rgb48le sar:1/1 flags:0x4 [auto_scaler_1 @ 017dee220280] w:800 h:600 fmt:rgb48le sar:1/1 -> w:800 h:600 fmt:yuv422p10le sar:1/1 flags:0x4 [libx264 @ 017dee1d8300] using SAR=1/1 [libx264 @ 017dee1d8300] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 017dee1d8300] profile High 4:2:2, level 3.1, 4:2:2, 10-bit [libx264 @ 017dee1d8300] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=81 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mov, to 'out.mov': Metadata: encoder : Lavf58.54.100 Stream #0:0: Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv422p10le, 800x600 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc58.106.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A No more output streams to write to, finishing.e=00:00:01.72
Re: [FFmpeg-user] Pixel format: default and filter?
Am 13.09.2020 um 17:27 schrieb amin...@mailbox.org: On Sun, Sep 13, 2020 at 07:06:56AM -0400, Edward Park wrote: Hi, ffprobe now reports out.mov being yuv420p. Is this an implicit conversion to a lower bit depth? It's just the default output format for overlay. It's commonly used for stuff across colorspaces (like yuv420p video and argb png logos overlaid) especially with alpha. You can set format option in the filter itself to force output format. I assume it doesn't do any conversions when you overlay two sources with same format with no alpha internally. Thanks both, that's helpful. How can I determine the pixel formats that ffmpeg has chosen for the filters' input and output pads? Add -v verbose to the command line, then you get a longer console listing, look for the green lines. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem with time-lapse
Am 10.09.2020 um 19:10 schrieb Jippo12: Hi! Yes, I was confused and didn't realize that ffmpeg can do all this :) because I first made a python script that creates star trails videos and they are copied when processing the next step. But for normal video, i use ffmpeg -i /mnt/ramdisk3g/workdir/%d.jpg -r 16 -vcodec mpeg4 -qsale 1 -y -filter:v "framestep=1,setpts=1.0*PTS" /mnt/ramdisk/mp4/ So I left the image multiplying step (from the python side) and Now there is now only 1 of each image in the workdir. Dropped out tblend because it makes image blur or something. https://drive.google.com/file/d/1HfG9WsUtE70DZT62SsqIUeIiZ9ZMwvbR/view?usp=sharing I'm going to use the above to finish star trails videos later too. You can also use the zoompan filter for duplicating the frames and then the framerate filter for crossfading between successive frames. I've described that in chapter 2.3 in my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Convert DNG
Am 07.09.2020 um 10:41 schrieb Paul B Mahol: On Mon, Sep 07, 2020 at 09:12:47AM +0200, Michael Koch wrote: Am 07.09.2020 um 08:46 schrieb Frei Sibylle Nora: Hello, I'm working in an Archive where we digitize analog movies. Our master-files are usually DPX but now we get a new scanner which save the movies in DNG files. Is there a possibility to convert de DNG files with FFMPEG to DPX files Do you mean CinemaDNG? That's not the same as DNG. DNG is a file format for RAW still images, while CinemaDNG is for videos. FFmpeg has an undocumented decoder for DNG images, but it's in an early experimental state and doesn't work with most images (in fact, I didn't find any DNG image that could be decoded correctly). Again spreading misinformation, this needs to stop. I kindly ask people who do not want good to this project, to just unsubsribe from the list. What's wrong in my answer? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Convert DNG
Am 07.09.2020 um 08:46 schrieb Frei Sibylle Nora: Hello, I'm working in an Archive where we digitize analog movies. Our master-files are usually DPX but now we get a new scanner which save the movies in DNG files. Is there a possibility to convert de DNG files with FFMPEG to DPX files Do you mean CinemaDNG? That's not the same as DNG. DNG is a file format for RAW still images, while CinemaDNG is for videos. FFmpeg has an undocumented decoder for DNG images, but it's in an early experimental state and doesn't work with most images (in fact, I didn't find any DNG image that could be decoded correctly). I don't know if FFmpeg has a decoder for CinemaDNG. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] builds for Windows
Am 03.09.2020 um 07:42 schrieb Gyan Doshi: On 02-09-2020 11:53 pm, Michael Koch wrote: "ffmpeg.zeranoe.com will close on Sep 18, 2020, and all builds will be removed." Any idea where we can get builds for Windows after this date? I plan to provide 64-bit static builds starting the 18th. Will update doc with link once I make arrangements. That's very good! Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] builds for Windows
"ffmpeg.zeranoe.com will close on Sep 18, 2020, and all builds will be removed." Any idea where we can get builds for Windows after this date? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem while converting DNG sequnece to video file
Am 21.08.2020 um 21:34 schrieb Michael Koch: Am 20.08.2020 um 09:57 schrieb Masala Kentaro: hello! I have problems using FFmpeg, while trying to convert DNG-sequence into mp4/mov/avi video file. While converting, I also need to downgrade the resolution of the video from original 6016x3200 to 2030x1080. First problem: I got almost black screen in the resulting video. Had to play with gamma and brightness options, but there were still obvious problems with saturation and contrast after that. (I tried simple DNG to PNG conversion of a single file, and it also results in almost black screen, command: ffmpeg -v 9 -loglevel 99 -i e:\12345\sample_r1.dng e:\output.tga) Let's not forget that the original poster of this thread had a question. I can't answer it, but I did try to reproduce it. I took a RAW CR2 image from my Canon 6D, converted it to DNG with Adobe DNG Converter 12.4, and then tried to convert it to JPG with FFmpeg: ffmpeg -i IMG_3459.dng out_6D.jpg This didn't work, see the console output below. I also tested with a RAW image from a Canon 5D-MK4, with the same negative result. I made another test with a DNG image which came directly out of a Pentax K5 camera. Same negative result. I also tested a few of the images from the original poster. With these images ffmpeg doesn't throw an error message, but the output image is either black, or has very low contrast and saturation. Just as he described. It seems FFmpeg's DNG decoder has many problems. Workaround: Convert the DNG images to PNG or (if 8-bit is sufficient) to high quality JPG. Then it should be no problem for FFmpeg to read them. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Some questions about PTS
Am 28.08.2020 um 13:38 schrieb Edward Park: Hi, Let's assume the framerate is constant. For example, I want to delay a video by 5 frames and then hstack the original video and the delayed version: ffmpeg -i test.mp4 -vf "split[a][b];[b]setpts=PTS+5/(FR*TB)[c];[a][c]hstack" -y out.mp4 I would try tpad=start=5, but I'm not sure what happens for the first 5 frames... If your example works I'm pretty sure it would work. ffmpeg -i test.mp4 -vf "split[a],tpad=start=5[b];[a][b]hstack" -y out.mp4 yes, that does also work fine. For the first 5 frames it's black, or the first frame can be cloned if "start_mode=clone" is added. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Some questions about PTS
Am 28.08.2020 um 11:25 schrieb Edward Park: Hello, I am not confident about this info but I've always thought the timebase is usually the reciprocal of the framerate *or smaller*. As in, the duration of a frame can be represented accurately enough as the difference between the timestamps, which aren't counted using seconds, but "ticks" in whatever timebase. So smaller fractions could be used as the timebase as long as the system is capable, and on the other hand, when you create low-fps video like 4fps, obviously the timebase isn't going to be 1/4, it'll probably have the same timebase as any other export. (I think of it as an analog wall clock, except it doesn't go tick-tock every second, it goes tick-tock every 1/9 seconds.) Actually, I think for the codec timebase, it is more common for it to be 1/2 the reciprocal of the frame rate; if that's codec-specific, I don't know why that is. Maybe you've also seen some setpts examples where you divide/multiply something by 2 for some arcane reason? Hopefully someone can explain further.. When you delay some frames by whatever amount, it necessarily effects a change in the frame rate (but not the timebase). I'm not sure where the FR value for setpts comes from, maybe it wouldn't matter if it stays the same as the nominal framerate if indicated by the media, but if it is something that can change, maybe the effective rate at the end of the chain, obviously it wouldn't work as expected. Just for the sake of curiosity, what has you looking to delay frames using setpts? I feel there are easier methods. Let's assume the framerate is constant. For example, I want to delay a video by 5 frames and then hstack the original video and the delayed version: ffmpeg -i test.mp4 -vf "split[a][b];[b]setpts=PTS+5/(FR*TB)[c];[a][c]hstack" -y out.mp4 Are there other / better / easier methods to do the same thing? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Some questions about PTS
Hello all, please comment if the following is right or wrong: -- The timebase of a video (TB in setpts filter) is expressed in the unit [s] (seconds). -- The framerate of a video (FR in setpts filter) is expressed in the unit [s^-1] (1/seconds). -- In many cases the timebase is the reciprocal of the framerate, but this isn't always the case. -- If the timebase is the reciprocal of the framerate, a stream can be delayed by x frames using setpts=PTS+x -- In the more general case for arbitrary timebase and framerate, a stream can be delayed by x frames using setpts=PTS+x/(FR*TB) Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 22.08.2020 um 11:03 schrieb Nicolas George: Carl Zwanzig (12020-08-21): IMHO, it would make more sense to remove the -all file as it's unweildly and doesn't seem to contain to contain everything anyway. It does contain everything, or there is a bug somewhere. And it is useful precisely because it contains everything: it stays. I agree that it's useful to have one file which contains _all_ documentation. Searching in one file is easier than searching at multiple places. But the content of general.html is missing in ffmpeg-all.html (and also in ffplay-all.html and ffprobe-all.html). Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 21:38 schrieb Gyan Doshi: Git mystifies me, too. I also did a lot of reading but it was written my Martians. For the purposes of only generating doc patches, you only need to know and apply a handful of git commands. Most of the supposed difficulties of working with git revolves around nonlinear histories. I see very little potential for that with pure docs work. You aren't tied to linux either. ffmpeg is perfectly compile-able and testable on Windows. I do it regularly, but even that's not needed here. It's nice to know help is available, and that's appreciated. But let me first look around at my old notes and see what all needs to be done. What can be done in the meantime is for someone to start a wiki or blog or forum and solicit, collect & curate requests for documentation changes. What do users most want answered or documented first? I have collected some things in chapter 2.115 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf An important first step would be to re-write git-howto.html and explain the git commands more detailed, the whole workflow step by step with many examples. Only the handfull of commands that we really need. Also the new introduced terms should be explained (cloning, push back, remote repository, checkout, tracked branch, rebasing, local branches, commit, master tree, merge commits, patchset). Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Problem while converting DNG sequnece to video file
Am 20.08.2020 um 09:57 schrieb Masala Kentaro: hello! I have problems using FFmpeg, while trying to convert DNG-sequence into mp4/mov/avi video file. While converting, I also need to downgrade the resolution of the video from original 6016x3200 to 2030x1080. First problem: I got almost black screen in the resulting video. Had to play with gamma and brightness options, but there were still obvious problems with saturation and contrast after that. (I tried simple DNG to PNG conversion of a single file, and it also results in almost black screen, command: ffmpeg -v 9 -loglevel 99 -i e:\12345\sample_r1.dng e:\output.tga) Let's not forget that the original poster of this thread had a question. I can't answer it, but I did try to reproduce it. I took a RAW CR2 image from my Canon 6D, converted it to DNG with Adobe DNG Converter 12.4, and then tried to convert it to JPG with FFmpeg: ffmpeg -i IMG_3459.dng out_6D.jpg This didn't work, see the console output below. I also tested with a RAW image from a Canon 5D-MK4, with the same negative result. Michael C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i IMG_3459.dng out_6D.jpg ffmpeg version git-2020-08-21-412d63f Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.1 (GCC) 20200805 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e --enable-libsvtav1 --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 58.100 / 56. 58.100 libavcodec 58.100.100 / 58.100.100 libavformat 58. 51.100 / 58. 51.100 libavdevice 58. 11.101 / 58. 11.101 libavfilter 7. 87.100 / 7. 87.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [tiff @ 01f73e39f440] Assuming black level pattern values are identical [tiff @ 01f73e39f440] Tiled TIFF is not allowed to strip [tiff_pipe @ 01f73e39d400] Stream #0: not enough frames to estimate rate; consider increasing probesize [tiff_pipe @ 01f73e39d400] decoding for stream 0 failed [tiff_pipe @ 01f73e39d400] Could not find codec parameters for stream 0 (Video: tiff, none): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (500) options Input #0, tiff_pipe, from 'IMG_3459.dng': Duration: N/A, bitrate: N/A Stream #0:0: Video: tiff, none, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native)) Press [q] to stop, [?] for help [tiff @ 01f73e3a5f80] Assuming black level pattern values are identical [tiff @ 01f73e3a5f80] Tiled TIFF is not allowed to strip Error while decoding stream #0:0: Invalid data found when processing input Cannot determine format of input stream 0:0 after EOF Error marking filters as finished Conversion failed! ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 18:41 schrieb Nicolas George: Michael Koch (12020-08-21): The page https://www.ffmpeg.org/git-howto.html was obviously not written for beginners. Many terms are introduced without explaining them, and examples are missing. I think it was written for people who were familiar with subversion. Have you considered following a general-purpose Git tutorial? yes, I did read that some time ago, without success. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 17:06 schrieb Gyan Doshi: On 21-08-2020 07:30 pm, Michael Koch wrote: Am 21.08.2020 um 15:42 schrieb Mark Filipak: On 08/21/2020 06:44 AM, Gyan Doshi wrote: On 21-08-2020 04:03 pm, Michael Koch wrote: Am 21.08.2020 um 12:09 schrieb Gyan Doshi: On 21-08-2020 02:36 pm, Michael Koch wrote: Am 21.08.2020 um 10:50 schrieb Paul B Mahol: On 8/21/20, Michael Koch wrote: Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Sorry but that list is incomplete. Then please add what's missing. FFmpeg's documentation is very incomplete. I had a rough roadmap at the start of the year for plugging the gaps, but other events transpired. I hope to start a systematic effort in September. May I assist you? I'm also ready to help, if it can be done without git. It would be cumbersome, having someone else merge the changes in a git repo. What concerns do you have about using git? I don't understand how git works. Have tried it some time ago, but didn't work, so I gave up. No good instructions available. A second computer with Linux seems to be required. Too complicated. I have no experience with Linux. I know C and C# programming, but I'm not a professional programmer. The page https://www.ffmpeg.org/git-howto.html was obviously not written for beginners. Many terms are introduced without explaining them, and examples are missing. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 15:42 schrieb Mark Filipak: On 08/21/2020 06:44 AM, Gyan Doshi wrote: On 21-08-2020 04:03 pm, Michael Koch wrote: Am 21.08.2020 um 12:09 schrieb Gyan Doshi: On 21-08-2020 02:36 pm, Michael Koch wrote: Am 21.08.2020 um 10:50 schrieb Paul B Mahol: On 8/21/20, Michael Koch wrote: Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Sorry but that list is incomplete. Then please add what's missing. FFmpeg's documentation is very incomplete. I had a rough roadmap at the start of the year for plugging the gaps, but other events transpired. I hope to start a systematic effort in September. May I assist you? I'm also ready to help, if it can be done without git. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 12:44 schrieb Gyan Doshi: On 21-08-2020 04:03 pm, Michael Koch wrote: Am 21.08.2020 um 12:09 schrieb Gyan Doshi: On 21-08-2020 02:36 pm, Michael Koch wrote: Am 21.08.2020 um 10:50 schrieb Paul B Mahol: On 8/21/20, Michael Koch wrote: Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Sorry but that list is incomplete. Then please add what's missing. FFmpeg's documentation is very incomplete. I had a rough roadmap at the start of the year for plugging the gaps, but other events transpired. I hope to start a systematic effort in September. Gyan P.S. ffmpeg supports roughly a few dozen image formats. I'll add the missing ones to https://ffmpeg.org/general.html#Image-Formats That's very interesting. I never found that "General Documentation" file because I thought "ffmpeg-all" contains what the filename implies: All. This is obviously not the case. The filename is misleading, if the file doesn't contain all documentation. Wouldn't it be better to combine these two files into one file, which contains really all? ffmpeg-all consolidates the documentation for all component options and the options of the ffmpeg core binary. tool. Start exploring at https://ffmpeg.org/documentation.html It would be helpful if you add a link in ffmpeg-all.html, chapter 20.9 (image2) which points to general.html, chapter 2.2 where the supported image formats are listed. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 12:09 schrieb Gyan Doshi: On 21-08-2020 02:36 pm, Michael Koch wrote: Am 21.08.2020 um 10:50 schrieb Paul B Mahol: On 8/21/20, Michael Koch wrote: Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Sorry but that list is incomplete. Then please add what's missing. FFmpeg's documentation is very incomplete. I had a rough roadmap at the start of the year for plugging the gaps, but other events transpired. I hope to start a systematic effort in September. Gyan P.S. ffmpeg supports roughly a few dozen image formats. I'll add the missing ones to https://ffmpeg.org/general.html#Image-Formats That's very interesting. I never found that "General Documentation" file because I thought "ffmpeg-all" contains what the filename implies: All. This is obviously not the case. The filename is misleading, if the file doesn't contain all documentation. Wouldn't it be better to combine these two files into one file, which contains really all? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Am 21.08.2020 um 10:50 schrieb Paul B Mahol: On 8/21/20, Michael Koch wrote: Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Sorry but that list is incomplete. Then please add what's missing. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?
Please add this to the documentation (for example in chapter 20.9 image2) FFmpeg supports the following image formats: BMP, DNG, GIF, JPG, PAM, PGM (binary P5 files are read/write, ascii P2 files are read-only), PGMYUV, PNG, PPM, TGA, TIFF. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
