Re: [FFmpeg-user] Question about "normalize" filter
Am 30.01.2023 um 08:47 schrieb Paul B Mahol: On Mon, Jan 30, 2023 at 12:23 AM Michael Koch wrote: Am 29.01.2023 um 23:36 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 23:07 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 22:05 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 19:32 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. Try attached patch. How must I set the options for the desired behaviour? Set first strength to reverse of second strength. So 1.0 and 0.0 or 0.0 and 1.0 I did try with strength=0:strength2=1 but the output isn't as expected. I'm using this input image: http://www.astro-electronic.de/flat.png The pixel values are about 171 in the center and 107 in the top right corner. The center to corner ratio is 171 / 107 = 1.6 In the output image I measure 248 in the center (which is almost as expected, probably correct because I'm measuring the average of a 7x7 neighborhood), but I measure 122 in the top right corner. The center to corner ratio is 248 / 122 = 2.03 The corner is too dark. I checked with oscilloscope filter (s=1:tw=1:t=1:x=0), far left pixels (as they are darkest) and they are not changing (min values are same with and without filter run) With default parameters and just strength(2) set to your values, so the darkest pixels are left untouched. Did not checked brightest pixels output, but they should be correct too. But that's not the behaviour I need. All pixels shall be multiplied by the same suitable constant, so that the brightest pixel becomes white. Input center: 171 Input corner: 107 constant c = 255 / 171 =1.49 Output center: 171 * c = 255 Output corner: 107 * c = 160 Normalization does not do that and that functionality does not belong to such filter, it stretches ranges of all pixel values so they reach maximal possible range. Can't you just add an option that disables the minimum finding algorithm, and set the minimum to zero (=black)? That would do the job. I just did, but for whatever reason you think its incorrect. You wrote: "With default parameters and just strength(2) set to your values, so the darkest pixels are left untouched." However I want that black remains untouched. That's not the same, because the darkest pixels in the image aren't black. The workaround is to insert a black pixel before normalizing: -vf drawbox=w=1:h=1:color=black,normalize 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 "normalize" filter
Am 29.01.2023 um 23:36 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 23:07 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 22:05 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 19:32 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. Try attached patch. How must I set the options for the desired behaviour? Set first strength to reverse of second strength. So 1.0 and 0.0 or 0.0 and 1.0 I did try with strength=0:strength2=1 but the output isn't as expected. I'm using this input image: http://www.astro-electronic.de/flat.png The pixel values are about 171 in the center and 107 in the top right corner. The center to corner ratio is 171 / 107 = 1.6 In the output image I measure 248 in the center (which is almost as expected, probably correct because I'm measuring the average of a 7x7 neighborhood), but I measure 122 in the top right corner. The center to corner ratio is 248 / 122 = 2.03 The corner is too dark. I checked with oscilloscope filter (s=1:tw=1:t=1:x=0), far left pixels (as they are darkest) and they are not changing (min values are same with and without filter run) With default parameters and just strength(2) set to your values, so the darkest pixels are left untouched. Did not checked brightest pixels output, but they should be correct too. But that's not the behaviour I need. All pixels shall be multiplied by the same suitable constant, so that the brightest pixel becomes white. Input center: 171 Input corner: 107 constant c = 255 / 171 =1.49 Output center: 171 * c = 255 Output corner: 107 * c = 160 Normalization does not do that and that functionality does not belong to such filter, it stretches ranges of all pixel values so they reach maximal possible range. Can't you just add an option that disables the minimum finding algorithm, and set the minimum to zero (=black)? That would do the job. Let me explain why I need this kind of normalization. Most lenses have vignetting. Especially in astronomical images, vignetting must be corrected before any other image processing can be done. For this purpose a flatfield image is taken with the same lens at the same aperture, but with a uniform white screen in front of the lens. Normally the flatfield image is exposed at roughly 50% gray level, to avoid problems with nonlinearity near white level. The linked image is the flatfield. Vignetting in an astronomical image is corrected by dividing the image by the flatfield. That can be done with the blend filter. If I use the flatfied as-is (with roughly 50% gray level), then the image is effectively multiplied by a factor 2. That's a problem because bright pixels might get clipped. To minimize this problem, I want to normalize the flatfield as close to white level as possible, before using 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] Question about "normalize" filter
Am 29.01.2023 um 23:07 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 22:05 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 19:32 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. Try attached patch. How must I set the options for the desired behaviour? Set first strength to reverse of second strength. So 1.0 and 0.0 or 0.0 and 1.0 I did try with strength=0:strength2=1 but the output isn't as expected. I'm using this input image: http://www.astro-electronic.de/flat.png The pixel values are about 171 in the center and 107 in the top right corner. The center to corner ratio is 171 / 107 = 1.6 In the output image I measure 248 in the center (which is almost as expected, probably correct because I'm measuring the average of a 7x7 neighborhood), but I measure 122 in the top right corner. The center to corner ratio is 248 / 122 = 2.03 The corner is too dark. I checked with oscilloscope filter (s=1:tw=1:t=1:x=0), far left pixels (as they are darkest) and they are not changing (min values are same with and without filter run) With default parameters and just strength(2) set to your values, so the darkest pixels are left untouched. Did not checked brightest pixels output, but they should be correct too. But that's not the behaviour I need. All pixels shall be multiplied by the same suitable constant, so that the brightest pixel becomes white. Input center: 171 Input corner: 107 constant c = 255 / 171 =1.49 Output center: 171 * c = 255 Output corner: 107 * c = 160 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 "normalize" filter
Am 29.01.2023 um 22:05 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Am 29.01.2023 um 19:32 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. Try attached patch. How must I set the options for the desired behaviour? Set first strength to reverse of second strength. So 1.0 and 0.0 or 0.0 and 1.0 I did try with strength=0:strength2=1 but the output isn't as expected. I'm using this input image: http://www.astro-electronic.de/flat.png The pixel values are about 171 in the center and 107 in the top right corner. The center to corner ratio is 171 / 107 = 1.6 In the output image I measure 248 in the center (which is almost as expected, probably correct because I'm measuring the average of a 7x7 neighborhood), but I measure 122 in the top right corner. The center to corner ratio is 248 / 122 = 2.03 The corner is too dark. 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 "normalize" filter
Am 29.01.2023 um 19:32 schrieb Paul B Mahol: On 1/29/23, Michael Koch wrote: Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. Try attached patch. How must I set the options for the desired behaviour? Micheal ___ 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] Question about "normalize" filter
Hello, if I understood the documentation correctly, the normalize filter maps the darkest input pixel to blackpt and the brightest input pixel to whitept: darkest pixel --> blackpt brightest pixel --> whitept However I need a slightly different mapping: A black input pixel shall remain black, and the brightest input pixel shall become white. black --> blackpt brightest pixel --> whitept With other words: Just multiply all pixels by a suitable constant. Don't add or subtract anything. Is this possible? Known workaround: Make sure that the input frame contains a black pixel, by inserting one in a corner. 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] Mathematical Art
Hello all, this is not a question. This cool equation was designed by Hamid Naderi Yeganeh. I did only translate it into a FFmpeg command. Let it run and see what comes out. ffmpeg -f lavfi -i color=black:s=hd1080,format=gray -vf geq=lum='st(0,(X-W/3)/450);st(1,(H/2-Y)/450);255*gt(-7/20-1/PI*atan(175*pow((ld(0)-63/100),2)+3500*pow(abs(ld(1)-1/10),(26/10-6/10*ld(0)))+160*pow(sin(ld(0)+2/5),8)-50*pow(sin(ld(0)+4/5),100)-500)-exp(-2000*(pow((ld(0)-7/4),2)+pow((ld(1)-33/200),2)-1/1000))-exp(1000*(ld(0)-2/5*ld(1)-43/20))+10*(exp(-exp(1000*(-1/4+pow(ld(1)+1/2,2)))-300*(1/10+pow(ld(1),2))*pow((ld(0)-1/2+13/10+(9/100+23*-1/100)*(ld(1)+2/5)+1/10*pow(cos(ld(1)+7/10),20)),2))+exp(-exp(1000*(-1/4+pow(ld(1)+1/2,2)))-300*(1/10+pow(ld(1),2))*pow((ld(0)-2/2+13/10+(9/100+23*1/100)*(ld(1)+2/5)+1/10*pow(cos(ld(1)+7/10),20)),2))+exp(-exp(1000*(-1/4+pow(ld(1)+1/2,2)))-300*(1/10+pow(ld(1),2))*pow((ld(0)-3/2+13/10+(9/100+23*-1/100)*(ld(1)+2/5)+1/10*pow(cos(ld(1)+7/10),20)),2))+exp(-exp(1000*(-1/4+pow(ld(1)+1/2,2)))-300*(1/10+pow(ld(1),2))*pow((ld(0)-4/2+13/10+(9/100+23*1/100)*(ld(1)+2/5)+1/10*pow(cos(ld(1)+7/10),20)),2))),0)' -frames 1 -y out.png You find more mathematical art on his Facebook page: https://www.facebook.com/HamidNaderiYeganeh 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] Replace part of the audio
Am 22.01.2023 um 23:52 schrieb Reino Wijnsma: Hello Michael, On 2023-01-22T18:50:20+0100, Michael Koch wrote: This command line works with asendcmd and astreamselect: ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 astreamselect map 1",asendcmd="6 astreamselect map 0",astreamselect=map=0 -y out.wav However with amix filter I have no idea what's the syntax for the string inside the string. It doesn't work. ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 amix weights '0 1'",amix=weights='1 0' -y out.wav You've got your quotes all wrong. Always surround the complete filter-chain with double quotes and use single quotes for the individual filters. ffmpeg -i audio1.wav -i audio2.wav -lavfi "asendcmd='4 astreamselect map 1',asendcmd='6 astreamselect map 0',astreamselect=map=0" -y out.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi "asendcmd='4 amix weights '\\\'0 1\\\',amix=weights='1 0'" -y out.wav 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".
Re: [FFmpeg-user] Replace part of the audio
Am 22.01.2023 um 19:21 schrieb Paul B Mahol: On 1/22/23, Michael Koch wrote: Am 22.01.2023 um 16:56 schrieb Michael Koch: Am 22.01.2023 um 16:25 schrieb Paul B Mahol: On 1/22/23, Michael Koch wrote: Am 21.01.2023 um 17:05 schrieb Paul B Mahol: On 1/19/23, Michael Koch wrote: Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: How can I replace a part of the audio from and to a specific time with some other audio/sound (I want to replace it with beep in this case)? Here is an example: ffmpeg -lavfi sine=500:d=10 -y audio1.wav ffmpeg -lavfi sine=2000:d=10 -y audio2.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix -y out.wav That is never going to give smooth transitions. Also overly complicated as can be simplified with commands to to amix filter. If my example is too complicated, then please show a simpler example. asendcmd=10.0 amix weights 'X Y', X/Y being wanted volume of first/second input to amix filter. That doesn't work because the argument of asendcmd must be encapsulated in quotes (because it contains spaces), and X Y must also be encapsulated in quotes. Please show the whole command line. This command line works with asendcmd and astreamselect: ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 astreamselect map 1",asendcmd="6 astreamselect map 0",astreamselect=map=0 -y out.wav However with amix filter I have no idea what's the syntax for the string inside the string. It doesn't work. ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 amix weights '0 1'",amix=weights='1 0' -y out.wav there is way to escape stuff Above you wrote that the command line can be simplified, and now escaping is required? That's too complicated. I'm out. 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] Replace part of the audio
Am 22.01.2023 um 16:56 schrieb Michael Koch: Am 22.01.2023 um 16:25 schrieb Paul B Mahol: On 1/22/23, Michael Koch wrote: Am 21.01.2023 um 17:05 schrieb Paul B Mahol: On 1/19/23, Michael Koch wrote: Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: How can I replace a part of the audio from and to a specific time with some other audio/sound (I want to replace it with beep in this case)? Here is an example: ffmpeg -lavfi sine=500:d=10 -y audio1.wav ffmpeg -lavfi sine=2000:d=10 -y audio2.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix -y out.wav That is never going to give smooth transitions. Also overly complicated as can be simplified with commands to to amix filter. If my example is too complicated, then please show a simpler example. asendcmd=10.0 amix weights 'X Y', X/Y being wanted volume of first/second input to amix filter. That doesn't work because the argument of asendcmd must be encapsulated in quotes (because it contains spaces), and X Y must also be encapsulated in quotes. Please show the whole command line. This command line works with asendcmd and astreamselect: ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 astreamselect map 1",asendcmd="6 astreamselect map 0",astreamselect=map=0 -y out.wav However with amix filter I have no idea what's the syntax for the string inside the string. It doesn't work. ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 amix weights '0 1'",amix=weights='1 0' -y out.wav 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] Replace part of the audio
Am 22.01.2023 um 16:25 schrieb Paul B Mahol: On 1/22/23, Michael Koch wrote: Am 21.01.2023 um 17:05 schrieb Paul B Mahol: On 1/19/23, Michael Koch wrote: Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: How can I replace a part of the audio from and to a specific time with some other audio/sound (I want to replace it with beep in this case)? Here is an example: ffmpeg -lavfi sine=500:d=10 -y audio1.wav ffmpeg -lavfi sine=2000:d=10 -y audio2.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix -y out.wav That is never going to give smooth transitions. Also overly complicated as can be simplified with commands to to amix filter. If my example is too complicated, then please show a simpler example. asendcmd=10.0 amix weights 'X Y', X/Y being wanted volume of first/second input to amix filter. That doesn't work because the argument of asendcmd must be encapsulated in quotes (because it contains spaces), and X Y must also be encapsulated in quotes. Please show the whole command line. 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] Replace part of the audio
Am 21.01.2023 um 17:05 schrieb Paul B Mahol: On 1/19/23, Michael Koch wrote: Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: How can I replace a part of the audio from and to a specific time with some other audio/sound (I want to replace it with beep in this case)? Here is an example: ffmpeg -lavfi sine=500:d=10 -y audio1.wav ffmpeg -lavfi sine=2000:d=10 -y audio2.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix -y out.wav That is never going to give smooth transitions. Also overly complicated as can be simplified with commands to to amix filter. If my example is too complicated, then please show a simpler example. 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] Issue with "%04d" when creating image sequence from a video
Am 20.01.2023 um 00:37 schrieb JJ jo: Hi, I'm new and I don't know if it's the right way to ask for a problem. I have a problem when attempting to create an image sequence from an mkv file. This is the code i put in a *.bat file: ffmpeg -i input.mkv %04d.jpg If used in a (Windows) batch file, you must replace % by %% 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] Replace part of the audio
Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: How can I replace a part of the audio from and to a specific time with some other audio/sound (I want to replace it with beep in this case)? Here is an example: ffmpeg -lavfi sine=500:d=10 -y audio1.wav ffmpeg -lavfi sine=2000:d=10 -y audio2.wav ffmpeg -i audio1.wav -i audio2.wav -lavfi [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix -y out.wav 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 black box over top of the video for a set duration at a set time.
Am 31.12.2022 um 10:31 schrieb Bouke / Videotoolshed: On 31 Dec 2022, at 04:53, Gyan Doshi wrote: On 2022-12-31 08:15 am, David Niklas wrote: Sorry for taking so long to reply. It is not working. Terminal output below. % ffmpeg -i Ducksinarow.mp4 -filter_complex "[0:0]drawbox=color=black:t=fill=enable='between(t,1.0,2.0)'" -c:a copy -c:v libvpx ducks.mp4 There should be a colon after fill, not = drawbox=color=black:t=fill:enable='between(t,1.0,2.0)' And for your next question that might come up (since you want to do multiple filters, I do too and just got bitten): There is a limitation on Windows that won’t accept long arguments. Do you have an example? I have used command lines _much_ longer than the above example, and never found a limitation. 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] Extract chapter names to a text file?
Am 06.12.2022 um 01:10 schrieb Carl Zwanzig: On 12/5/2022 1:36 PM, Laine wrote: If you are able to generate “chapters.txt” but observe an overabundance of information in that file, you might try the options that I used to get just the video title and a list of the chapters. 'grep' does wonders for pulling info out of files grep '^title=' chapters.txt (return all lines that start with "title=") all *nix and the mac should have grep, windoze doesn't unless you installed it yourself In Windows you can pipe the console output to "findstr". In my book is an example in chapter 8: 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] Sending 2 camera outputs side by side to loopback device
Am 25.11.2022 um 08:02 schrieb Jim Ruxton: I am on Ubuntu 22.04 and trying to combine 2 cameras into one stream that is being sent to a loopback device. The command appears to work but I can't see the stream in any way. I've tried VLC Cheese ffplay guvcview and none of them work. The command I am using is : *ffmpeg -f v4l2 -vcodec rawvideo -i /dev/video0 -f v4l2 -vcodec rawvideo -i /dev/video2 -filter_complex hstack,"scale=iw*.5:ih*1" -f v4l2 -vcodec mjpeg /dev/video4 * It seems you forgot to specify an output file or pipe at the end of the command line. 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] datascope 16-bit
Am 22.11.2022 um 02:15 schrieb Jim DeLaHunt: On 2022-11-20 00:15, Michael Koch wrote: Am 20.11.2022 um 02:39 schrieb list+ffmpeg-u...@jdlh.com: On 2022-11-19 07:34, Michael Koch wrote: Am 03.11.2022 um 10:10 schrieb Paul B Mahol: Some things in sea of myriad others: [...] Why you claim that datascope does not support >8 bit formats where in fact it does support it? In some cases datascope works with 16-bit data, but not in all cases. Here is an example where it doesn't work: ffmpeg -f lavfi -i color=black:s=32x32,format=gray10le -lavfi geq=lum='X+32*Y',format=gray10le -frames 1 -y test.png ffmpeg -i test.png -vf format=rgb48,showinfo,datascope=s=1280x1152:mode=color2:format=hex -y out.png Perhaps clarify what you observe as "doesn't work", and what behaviour you expect? Both those commands run for me without error, and I can view both test.png and out.png without problem. out.png has a cascade of 32 2-digit hex numbers on the left half, and solid black on the right half. The hex numbers run from 00 to 7F, in white on a black to grey gradient background, and from 80 to FF, in black on a grey to white background. I would expect 4-digit hex numbers, because the rgb48 pixel format is 16-bit per channel. For example, it works fine if "rgb48" is replaced by "gray16". The phrase "works fine" appeals to some notion of what is "correct" behaviour. It seems that you have your own idea of "correct" behaviour for this filter. But it seems more helpful for communication on this list to use FFmpeg's idea of "correct" behaviour. And the best source we have for FFmpeg's idea of "correct" is the filter documentation <https://ffmpeg.org/ffmpeg-all.html#datascope>: "Video data analysis filter. This filter shows hexadecimal pixel values of part of video." I think the description in the documentation is incomplete and unclear. I wish FFmpeg had a better description. But the actual behaviour does not conflict with this incomplete description. The description does not promise that the datascope filter shows the full-precision, untruncated pixel values. It might be (I did not check) that the 8-bit values which datascope displays for an rgb48 input image are the correct upper 8 bits of 16-bit pixel values. So, you said, "In some cases datascope works with 16-bit data, but not in all cases." If you had instead said, "In some cases datascope gives useful results with 16-bit data, but not in all cases", then I would be completely with you. It is clear that truncated 8 bit values for an rbg48 input are not as helpful as full-precision, untruncated 16-bit pixel values. But the sad reality is the FFmpeg only does not always document its intended behaviour clearly, and does not seem to have a goal of always providing the most helpful behaviour. The culture here understands "doesn't support" or "doesn't work" to mean, "ffmpeg terminates prematurely with an error" or "ffmpeg fails to generate output". If you use those phrases when your objection is actually, "runs to completion and generates output, but output is not as helpful as it could be", then your message gets diluted by misunderstanding. Sorry for describing the issue not clear enough. In ticket #10057 it should be clear. 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] datascope 16-bit
Am 20.11.2022 um 02:39 schrieb list+ffmpeg-u...@jdlh.com: On 2022-11-19 07:34, Michael Koch wrote: Am 03.11.2022 um 10:10 schrieb Paul B Mahol: Some things in sea of myriad others: [...] Why you claim that datascope does not support >8 bit formats where in fact it does support it? In some cases datascope works with 16-bit data, but not in all cases. Here is an example where it doesn't work: ffmpeg -f lavfi -i color=black:s=32x32,format=gray10le -lavfi geq=lum='X+32*Y',format=gray10le -frames 1 -y test.png ffmpeg -i test.png -vf format=rgb48,showinfo,datascope=s=1280x1152:mode=color2:format=hex -y out.png Perhaps clarify what you observe as "doesn't work", and what behaviour you expect? Both those commands run for me without error, and I can view both test.png and out.png without problem. out.png has a cascade of 32 2-digit hex numbers on the left half, and solid black on the right half. The hex numbers run from 00 to 7F, in white on a black to grey gradient background, and from 80 to FF, in black on a grey to white background. I would expect 4-digit hex numbers, because the rgb48 pixel format is 16-bit per channel. For example, it works fine if "rgb48" is replaced by "gray16". 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] datascope 16-bit
Am 03.11.2022 um 10:10 schrieb Paul B Mahol: Some things in sea of myriad others: [...] Why you claim that datascope does not support >8 bit formats where in fact it does support it? In some cases datascope works with 16-bit data, but not in all cases. Here is an example where it doesn't work: ffmpeg -f lavfi -i color=black:s=32x32,format=gray10le -lavfi geq=lum='X+32*Y',format=gray10le -frames 1 -y test.png ffmpeg -i test.png -vf format=rgb48,showinfo,datascope=s=1280x1152:mode=color2:format=hex -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] Piping from FFmpeg to FFplay
Am 13.11.2022 um 22:52 schrieb Reino Wijnsma: On 2022-11-13T20:45:42+0100, Michael Koch wrote: ffmpeg -f lavfi -i testsrc2 -f nut | ffplay - Btw, I hope you know that ffplay can do this too: ffplay -f lavfi testsrc2 yes, that's known. 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] Piping from FFmpeg to FFplay
Am 13.11.2022 um 22:47 schrieb Reino Wijnsma: On 2022-11-13T22:18:15+0100, Michael Koch wrote: Is the "-" at the end an (undocumented) option of FFplay, or is it a batch file operator? The first, I guess. I've found 'opusenc' (Opus command-line encoder) to print: Usage: opusenc [options] input_file output_file.opus [...] input_file can be: filename.wav file - stdin output_file can be: filename.opus compressed file - stdout [...] But I also have lots of other binaries where the help-section doesn't mention the dash or stdin. So I guess the developers assume it's common knowledge. 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".
Re: [FFmpeg-user] Piping from FFmpeg to FFplay
Am 13.11.2022 um 21:57 schrieb Reino Wijnsma: Hello Michael, On 2022-11-13T20:45:42+0100, Michael Koch wrote: ffmpeg -f lavfi -i testsrc2 -f nut | ffplay - This command line works fine and I have used it many times. It shouldn't, because you forgot a "-" after "-f nut". oops, sorry I forgot to type that "-" in the email. You are right that it doesn't work without it. But I don't know what's the meaning of the - character after ffplay. Input or output. An url or a file-path. And in this case; stdout and stdin. FFmpeg's stdout is piped to FFplay's stdin. I'm surprised you didn't know. Is the "-" at the end an (undocumented) option of FFplay, or is it a batch file operator? 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] Piping from FFmpeg to FFplay
I have a question about piping from FFmpeg to FFplay (in a Windows batch file): ffmpeg -f lavfi -i testsrc2 -f nut | ffplay - This command line works fine and I have used it many times. But I don't know what's the meaning of the - character after ffplay. Does this - character belong to the ffplay command? What does it mean? Or is it a batch file operator, like the | character? I can't find - without any following characters in the FFmpeg or FFplay 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] Change fps from 50 to 25
Am 12.11.2022 um 12:39 schrieb Cecil Westerhof via ffmpeg-user: I have a few videos that have a 50 fps. But the computer I am playing them on cannot handle that properly. Can I use ffmpeg to change the fps to 25? While still having the same length. sure, that's easy: ffmpeg -i in.mp4 -r 25 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] 16:9 to 2.35:1 and true HD 7.1 to DTS
Am 03.11.2022 um 20:17 schrieb Bartosz Trzebuchowski: Hi, I’m completely new to ffmpeg and have 2 questions: 1. How can I convert 16:9 movies to 2.35:1? My projector can’t scale down and 16:9 movies run outside my 2.35:1 canvas at the top and the bottom. I need to black out top and bottom so only 2.35:1 is visible. Have a look at the documentation for the "pad" filter. The following example might work, but I haven't tested it: ffmpeg -i input.mp4 -vf pad=x=-1:y=-1:aspect=2.35 output.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] V360 stabilization
Am 03.11.2022 um 10:10 schrieb Paul B Mahol: Your book is full or factual errors, Notice to anyone: do not use this thing for anything serious. Thank you for so much promotion for my book. Sure, it's likely that in more than 900 pages there are a few errors. We all make errors. If anyone finds an error, please let me know. You find my e-mail address on the first page. http://www.astro-loltronic.de/FFmpeg_Book.pdf I did not write what you quoted above. You did edit the link. It's very bad behaviour to edit what someone else has written, and make it look as if I wrote 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] V360 stabilization
Am 03.11.2022 um 10:10 schrieb Paul B Mahol: On 11/3/22, Michael Koch wrote: Am 03.11.2022 um 09:35 schrieb Paul B Mahol: On 10/11/20, Michael Koch wrote: 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. Your book is full or factual errors, Notice to anyone: do not use this thing for anything serious. Thank you for so much promotion for my book. Sure, it's likely that in more than 900 pages there are a few errors. We all make errors. If anyone finds an error, please let me know. You find my e-mail address on the first page. http://www.astro-loltronic.de/FFmpeg_Book.pdf Some things in sea of myriad others: Why you claim that FFmpeg does not have SER format support while in fact it have support for it? You are right, it is supported now. But my first test to convert a 16-bit grayscale SER file to MP4 failed. I will provide a short sample file later. At the moment I only have SER files that are too big for uploading. Why you claim that datascope does not support >8 bit formats where in fact it does support it? Why you claim that drawbox does not support RGB formats while in fact it does support them? Perhaps these features weren't supported at the time when I wrote that, but they are supported now. All three issues are already corrected in the book and an updated version is online. 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 03.11.2022 um 09:35 schrieb Paul B Mahol: On 10/11/20, Michael Koch wrote: 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. Your book is full or factual errors, Notice to anyone: do not use this thing for anything serious. Thank you for so much promotion for my book. Sure, it's likely that in more than 900 pages there are a few errors. We all make errors. If anyone finds an error, please let me know. You find my e-mail address on the first page. 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] Error in aeval?
Am 29.10.2022 um 12:02 schrieb Paul B Mahol: On 10/29/22, Michael Koch wrote: This command line works as expected: ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5 -y out.wav Why does it no longer work when I replace sin(2)*sin(2) by pow(sin(2),2) ? ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5 -y out.wav Is this a bug? The console output is below. PEBKAC Escape ',' now it works, 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] Error in aeval?
This command line works as expected: ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5 -y out.wav Why does it no longer work when I replace sin(2)*sin(2) by pow(sin(2),2) ? ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5 -y out.wav Is this a bug? The console output is below. Michael C:\Users\astro\Desktop\Mosquito>ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5 -y out.wav ffmpeg version 2022-10-24-git-d79c240196-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 12.1.0 (Rev2, 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-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --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 57. 39.101 / 57. 39.101 libavcodec 59. 51.100 / 59. 51.100 libavformat 59. 34.101 / 59. 34.101 libavdevice 59. 8.101 / 59. 8.101 libavfilter 8. 49.101 / 8. 49.101 libswscale 6. 8.112 / 6. 8.112 libswresample 4. 9.100 / 4. 9.100 libpostproc 56. 7.100 / 56. 7.100 [Parsed_aeval_1 @ 02d8c2939000] [Eval @ 00f7499fe440] Missing ')' or too many args in 'pow(sin(2)' [lavfi @ 02d8c29261c0] Error initializing filter 'aeval' with args 'val(0)|val(0)*pow(sin(2)' sine,aeval=val(0)|val(0)*pow(sin(2),2): Invalid argument ___ 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] What is a "pad" in the context of an "input pad", an "output pad" and a "filter pad"
Am 27.10.2022 um 21:57 schrieb Clay via ffmpeg-user: Dumb ffmpeg question alert: What is a "pad" in the context of an "input pad", an "output pad" and a "filter pad"? "input pad" and "output pad" are described in chapter 32: https://www.ffmpeg.org/ffmpeg-all.html#Filtergraph-description "filter pad"? 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] encode to RAW video
Am 25.10.2022 um 09:29 schrieb Naveen.B: What do you want to do with the RAW video? You know that you can't play it with most players? Yes, I know it cannot be played with most of th players, I need to see the size of the RAW video and make some compression on it for our further analysis. Could you please help me on the missing parameters to generate the RAW video? I did some tests and came to the conclusion that it's impossible to import a group of numbered raw images. It's possible to import a single raw image. It's possible to import a group of numbered images (JPG, PNG, TIF...) But it's not possible to import a numbered group of raw images. (To the experts: Please correct me if I'm wrong). Anyway it's a bad idea to save the images in raw format. You should use PNG images, which have a lossless compression, and 16-bit depth is possible. I recommend that you convert your images to PNG, and then things become much easier. Here is a (Windows) batch file with a few examples: rem Make 30 PNG images (48-bit per pixel): ffmpeg -f lavfi -i testsrc2=s=320x200,format=rgb48 -frames 30 -f image2 -y image-%%03d.png rem Convert these 30 images to a raw video (this conversion is lossless): ffmpeg -i image-%%03d.png -s 320x200 -pixel_format rgb48 -f rawvideo -c:v rawvideo -y video.raw rem The size of the raw video is exactly 320 * 200 * 2 * 3 * 30 = 1152 Bytes rem Convert the first frame from the raw video to a PNG image (48-bit per pixel): ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -i video.raw -frames 1 -y image.png rem Convert the raw video to a (almost lossless) MP4 video: ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -framerate 30 -i video.raw -crf 0 -y video.mp4 pause I have a question to the experts. The above example works fine with pixel format rgb48, but with pixel formats gray16 or gray10le the MP4 output looks wrong. I don't yet understand why. 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] encode to RAW video
Am 24.10.2022 um 18:36 schrieb Naveen.B: Are you sure that there is a file CapturedImage-000.raw ? You forgot to specify the input pixel format. Many parameters are missing for the raw output. But the error message is from the input. Do you really want raw video? That's not the easiest format for a beginner. Everything must be specified for the input (file format, pixel format, size, framerate, and whatever I may have forgotten...) and the same things must be specified for the output again. [image: image.png] this error pops up when I add the flag -f rawvideo (I have a raw files, should this be used for raw video?) I tried by giving the input with -pix_fmt, it's the same error. Yes, I want raw video. I have converted RAW files to .mp4 successfully with uncompressed, the size of the .mp4 format video was less comparatively. I have 30 RAW files with each file is around 4Mbps (so, 30 RAW filesx4Mbps=180Mbps for one second), the output of the video file size (.mp4) is coming around 18 Mbps, so I am assuming .mp4 video format is doing some compression and hence I need to try this with RAW video. What do you want to do with the RAW video? You know that you can't play it with most players? 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] encode to RAW video
Am 24.10.2022 um 17:50 schrieb Naveen.B: Hello Team, I have managed to convert raw Images files to .mp4 video, I need to encode to a RAW video instead, could you please let me know the command for this? RAW Image file is, resolution - 1600x1300 fps-30 bit depth-16bit Do not specify a video codec, or set -c:v rawhide, set your frame rate / resolution / bit depth params and use .raw as extension. I tried as you suggested, I get the below error, You must specify all relevant parameters for the output file at the correct place in the command line. After the input file name, and before the output file name. I think you must also add -f rawvideo Remove -crf 1, as it makes no sense for a raw file. C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin>ffmpeg -f rawvideo -s 1600x1300 -r 30 -i CapturedImage-%03d.raw raw_video.raw ffmpeg version 2022-06-20-git-56419428a8-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 11.3.0 (Rev1, 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-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --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 57. 27.100 / 57. 27.100 libavcodec 59. 33.100 / 59. 33.100 libavformat59. 25.100 / 59. 25.100 libavdevice59. 6.100 / 59. 6.100 libavfilter 8. 41.100 / 8. 41.100 libswscale 6. 6.100 / 6. 6.100 libswresample 4. 6.100 / 4. 6.100 libpostproc56. 5.100 / 56. 5.100 CapturedImage-%03d.raw: No such file or directory These files are present in the directory, but still its throwing this error, No such file or directory. Are you sure that there is a file CapturedImage-000.raw ? You forgot to specify the input pixel format. Many parameters are missing for the raw output. But the error message is from the input. Do you really want raw video? That's not the easiest format for a beginner. Everything must be specified for the input (file format, pixel format, size, framerate, and whatever I may have forgotten...) and the same things must be specified for the output again. 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] Convert from TIF to DNG
On a website (1) I found the idea that a TIF file can be converted to a DNG file just by adding some tags and renaming it. Let's test it. Make a 16-bit TIF file: ffmpeg -f lavfi -i nullsrc=s=320x320,format=yuv444p10le -vf geq=lum='X/W*32+32*floor(Y/H*32)':cr=512:cb=512,format=rgb48be -frames 1 -y test16.tif Add some tags: exiftool -DNGVersion="1.4.0.0" -PhotometricInterpretation="Linear Raw" test16.tif Rename the file to DNG: copy test16.tif test16.dng The DNG file can be opened with FFmpeg without any problems. But all other programs complain that the file is corrupt. I tested with IrfanView, FastStone, Gimp and Fitswork. What else might be required to make it a valid DNG file? Michael (1) https://rawpedia.rawtherapee.com/Film_Simulation#Advanced_-_Identity_DNG ___ 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] encode to RAW video
Am 24.10.2022 um 14:29 schrieb Naveen.B: On 24 Oct 2022, at 12:52, Naveen.B wrote: Hello Team, I have managed to convert raw Images files to .mp4 video, I need to encode to a RAW video instead, could you please let me know the command for this? RAW Image file is, resolution - 1600x1300 fps-30 bit depth-16bit Do not specify a video codec, or set -c:v rawhide, set your frame rate / resolution / bit depth params and use .raw as extension. I tried as you suggested, I get the below error, You must specify all relevant parameters for the output file at the correct place in the command line. After the input file name, and before the output file name. I think you must also add -f rawvideo Remove -crf 1, as it makes no sense for a raw file. 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".
mail 17.09
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
mail 17.06
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
mail 17.04
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
mail 16.57
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mailtest 16.51
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
mailtest 16.41
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
Mailman test please ignore 16.29
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Mailtest please ignore 15.57
Dies ist der Inhalt Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
Re: [FFmpeg-user] ScaleUp the Raw file
The -s option in your command line is for the output size because it's written after -i. You must also set the input size before -i. Your RAW image contains only pixel data and no header for size and pixel format. I din't understand the header for size and pixel format, width error is resolved but the error Invalid argument is still coming. This example works for me: rem Make a RAW image: ffmpeg -f lavfi -i testsrc2=s=320x200 -pixel_format gray10be -frames 1 -f rawvideo -y raw.raw rem The file raw.raw contains exactly 320 x 200 x 2 = 128000 bytes rem It doesn't contain any information about width, height and pixel format. rem Convert the RAW image to JPG: ffmpeg -s 320x200 -pixel_format gray10be -f rawvideo -i raw.raw -y out.jpg 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] ScaleUp the Raw file
Am 19.10.2022 um 21:50 schrieb Naveen.B: I got an error by trying this command. Could you kindly let me know if this is feasible? Always always always include the complete output of ffmpeg when asking for help. For one, we don't know what error you got. C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin>ffmpeg -i CapturedImage-001.raw -vf scale=1920:1080 CapturedImageScale-001.raw ffmpeg version 2022-06-20-git-56419428a8-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 11.3.0 (Rev1, 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-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --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 57. 27.100 / 57. 27.100 libavcodec 59. 33.100 / 59. 33.100 libavformat59. 25.100 / 59. 25.100 libavdevice59. 6.100 / 59. 6.100 libavfilter 8. 41.100 / 8. 41.100 libswscale 6. 6.100 / 6. 6.100 libswresample 4. 6.100 / 4. 6.100 libpostproc56. 5.100 / 56. 5.100 [image2 @ 023a84c00880] Format image2 detected only with low score of 5, misdetection possible! [rawvideo @ 023a84c14b40] Invalid pixel format. [image2 @ 023a84c00880] Failed to open codec in avformat_find_stream_info [rawvideo @ 023a84c14b40] Invalid pixel format. Last message repeated 1 times [image2 @ 023a84c00880] Failed to open codec in avformat_find_stream_info [image2 @ 023a84c00880] Could not find codec parameters for stream 0 (Video: rawvideo, none): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (500) options Input #0, image2, from 'CapturedImage-001.raw': Duration: 00:00:00.04, start: 0.00, bitrate: 832000 kb/s Stream #0:0: Video: rawvideo, none, 25 fps, 25 tbr, 25 tbn [NULL @ 023a84c15b80] Unable to find a suitable output format for 'CapturedImageScale-001.raw' CapturedImageScale-001.raw: Invalid argument C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin> I think you must tell FFmpeg the pixel format and the size of the input image. If you would use JPG or PNG as input format, then FFmpeg would detect these details automatically. But for RAW format FFmpeg can't know the details. I gave the pixel_format and input size is 1920x1080, but I get error width is not set and one more error which I dont understand. C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin>ffmpeg -pixel_format gray10le -i CapturedImage-001.raw -r 30 -s 1920x1080 CapturedImageScale-001.raw The -s option in your command line is for the output size because it's written after -i. You must also set the input size before -i. Your RAW image contains only pixel data and no header for size and pixel format. 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] ScaleUp the Raw file
Am 19.10.2022 um 21:26 schrieb Naveen.B: I got an error by trying this command. Could you kindly let me know if this is feasible? Always always always include the complete output of ffmpeg when asking for help. For one, we don't know what error you got. C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin>ffmpeg -i CapturedImage-001.raw -vf scale=1920:1080 CapturedImageScale-001.raw ffmpeg version 2022-06-20-git-56419428a8-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 11.3.0 (Rev1, 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-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --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 57. 27.100 / 57. 27.100 libavcodec 59. 33.100 / 59. 33.100 libavformat59. 25.100 / 59. 25.100 libavdevice59. 6.100 / 59. 6.100 libavfilter 8. 41.100 / 8. 41.100 libswscale 6. 6.100 / 6. 6.100 libswresample 4. 6.100 / 4. 6.100 libpostproc56. 5.100 / 56. 5.100 [image2 @ 023a84c00880] Format image2 detected only with low score of 5, misdetection possible! [rawvideo @ 023a84c14b40] Invalid pixel format. [image2 @ 023a84c00880] Failed to open codec in avformat_find_stream_info [rawvideo @ 023a84c14b40] Invalid pixel format. Last message repeated 1 times [image2 @ 023a84c00880] Failed to open codec in avformat_find_stream_info [image2 @ 023a84c00880] Could not find codec parameters for stream 0 (Video: rawvideo, none): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (500) options Input #0, image2, from 'CapturedImage-001.raw': Duration: 00:00:00.04, start: 0.00, bitrate: 832000 kb/s Stream #0:0: Video: rawvideo, none, 25 fps, 25 tbr, 25 tbn [NULL @ 023a84c15b80] Unable to find a suitable output format for 'CapturedImageScale-001.raw' CapturedImageScale-001.raw: Invalid argument C:\Naveen\projects\DMS\software\ffmpeg_full\ffmpeg\bin> I think you must tell FFmpeg the pixel format and the size of the input image. If you would use JPG or PNG as input format, then FFmpeg would detect these details automatically. But for RAW format FFmpeg can't know the details. 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".
Mailtest 2 extern- please ignore EOM
Hallo du da, Dies ist der Inhalt Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
Mailtest please ignore EOM
Mit freundlichen Grüßen / Best regards Michael Koch -- Michael Koch Senior Network Administrator Mitutoyo CTL Germany GmbH Von-Gunzert-Straße 17 D-78727 Oberndorf am Neckar Tel.: +49-7423-8776-54 <http://www.mitutoyo-ctl.de/> www.mitutoyo-ctl.de HRB 734157, Stuttgart UST-Id: DE272400711 Geschäftsführer: Hans-Peter Klein, Swen Haubold Informationen zum Umgang mit Ihren Daten finden Sie <https://www.mitutoyo-ctl.de/datenschutzerklaerung/datenschutzerklaerung-fue r-geschaeftspartner/> hier. smime.p7s Description: S/MIME cryptographic signature
Re: [FFmpeg-user] Help: is it possibile to join an image and a live stream?
Am 07.10.2022 um 20:28 schrieb Michael Koch: Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? it can also be done with "streamselect" filter, have a look at the documentation for an example. I haven't yet found a working example for sendcmd / streamselect. What's the problem in this command line? ffmpeg -re -f lavfi -i color=red:s=1280x720 -f lavfi -i testsrc2=s=1280x720 -lavfi sendcmd='5.0 streamselect map 1';[0][1]streamselect=map=0 -f sdl2 - The error message is "Unable to find a suitable output format for 'streamselect' " I'm not sure what's the meaning of this message. Does it mean a) The previous filter has no suitable output format for the input of the streamselect filter or b) The streamselect filter has no suitable output format for the next filter? The console output is below. Michael C:\Users\astro\Desktop\test>ffmpeg -re -f lavfi -i color=red:s=1280x720 -f lavfi -i testsrc2=s=1280x720 -lavfi sendcmd='5.0 streamselect map 1';[0][1]streamselect=map=0 -f sdl2 - ffmpeg version 2022-10-02-git-5f02a261a2-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 12.1.0 (Rev2, 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-bzlib --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-mediafoundation --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 57. 38.100 / 57. 38.100 libavcodec 59. 49.100 / 59. 49.100 libavformat 59. 33.100 / 59. 33.100 libavdevice 59. 8.101 / 59. 8.101 libavfilter 8. 49.100 / 8. 49.100 libswscale 6. 8.112 / 6. 8.112 libswresample 4. 9.100 / 4. 9.100 libpostproc 56. 7.100 / 56. 7.100 Input #0, lavfi, from 'color=red:s=1280x720': Duration: N/A, start: 0.00, bitrate: N/A Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn Input #1, lavfi, from 'testsrc2=s=1280x720': Duration: N/A, start: 0.00, bitrate: N/A Stream #1:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn [NULL @ 023291ccd4c0] Unable to find a suitable output format for 'streamselect' streamselect: Invalid argument ___ 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] R: Help: is it possibile to join an image and a live stream?
Am 07.10.2022 um 21:32 schrieb i...@mbsoft.biz: I have tried ffmpeg.exe" -loglevel quiet -analyzeduration 0 -probesize 32 -report -i "e:\\logo.png" -f dshow -video_size 1280x720 -framerate 30 -video_device_number 0 -i "video=Full HD 1080P PC Camera" "sendcmd='5.0" streamselect map "1',streamselect=inputs=2:map=0" out.mp4 buti t do not work I think there are several errors in your command line. But even after I corrected them, I didn't find a working example with streamselect. But I found a working example with "overlay" filter. You must change your camera name. Make sure that the image has the same size as the camera. ffmpeg -loop 1 -framerate 10 -i img.jpg -f dshow -video_size 1280x720 -framerate 10 -i video="BisonCam,NB Pro" -lavfi [0]format=rgb24[a];[1]format=rgb24[b];[b][a]overlay=enable='lt(t,5)':format=rgb -f sdl2 - 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] Help: is it possibile to join an image and a live stream?
Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? it can also be done with "streamselect" filter, have a look at the documentation for an example. 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] Help: is it possibile to join an image and a live stream?
Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? Here is an example for switching between two inputs after 5 seconds: ffmpeg -f lavfi -i color=red -f lavfi -i color=yellow -lavfi blend=all_expr='if(lt(T,5),A,B)' -y -t 10 test.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] datascope
Am 18.09.2022 um 18:50 schrieb Carl Zwanzig: On 9/18/2022 5:28 AM, Michael Koch wrote: It seems the crop filter did change the pixel format to GBR. Which brings the follow-up question- why did crop...? geq or crop, one of them. IIRC, some/many/most/all filters operate on a limited number of pix formats and ffmpeg automatically inserts conversion steps as needed. If this is true, it would be helpful for the user docs to show the native in/out pix formats of each filter. I agree. That should be 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] datascope
Am 18.09.2022 um 13:36 schrieb Michael Koch: Why does datascope show the color components in the unusual order GBR (from top to bottom)? It's confusing. Can the order be changed to RGB? ffmpeg -f lavfi -i color=black:s=26x6 -lavfi format=rgb24,geq=r='clip(64*mod(X,5),0,255)':g='clip(64*Y,0,255)':b='clip(64*trunc(X/5),0,255)',crop=25:5:0:0,datascope=s=750x180:mode=color2:format=dec -frames 1 -y test.png I found a solution. It seems the crop filter did change the pixel format to GBR. It works if format=rgb24 is inserted before datascope. ___ 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] datascope
Why does datascope show the color components in the unusual order GBR (from top to bottom)? It's confusing. Can the order be changed to RGB? ffmpeg -f lavfi -i color=black:s=26x6 -lavfi format=rgb24,geq=r='clip(64*mod(X,5),0,255)':g='clip(64*Y,0,255)':b='clip(64*trunc(X/5),0,255)',crop=25:5:0:0,datascope=s=750x180:mode=color2:format=dec -frames 1 -y test.png ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 16.09.2022 um 16:51 schrieb Erik Dobberkau: Apart from width, height, PAR, DAR and SAR, bit depth and subsampling method, the color encoding parameters are responsible for the visual representation of an image: color space, primaries, white point, transfer function, color range, and color matrix (if something other than RGB encoding is used). Is colorspace and color matrix not the same? If not, how can color matrix be specified in the command line? How can white point be specified in the command line? I did specify -pix_fmt, -colorspace, -color_trc, -color_primaries and -color_range. But that seems to be not sufficient. The color in VLC player is different for height=576 and height=720. ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -pix_fmt yuv420p -colorspace rgb -color_trc bt709 -color_primaries bt709 -color_range pc -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x720 -pix_fmt yuv420p -colorspace rgb -color_trc bt709 -color_primaries bt709 -color_range pc -crf 0 -vcodec libx264 -t 5 -y out2.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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 16.09.2022 um 16:34 schrieb Dan: On Fri, 16 Sep 2022 14:55:20 +0100, Michael Koch wrote: Am 16.09.2022 um 15:20 schrieb Dan: showinfo filter shows video frame color metadata to output of console, nothing less - nothing more. showinfo cant produce incorrect video, if you ever bothered to read documentation you would know. By the way, just to clarify, I wasn't talking about the console output, but the window it opened up alongside (on the right), which showed the green was darker. Nobody is wrong. Everybody is correct. Your file is encoded so badly that it should be immediately removed from existence. In the end, I used "-colorspace fcc" which seems to have fixed the issue. Please show your complete command line. Because for me it doesn't work. Different colors for height 576 and 720. Sure: ffmpeg.exe -f lavfi -i color=0x19be0f:s=400x720 -crf 0 -vcodec libx264 -t 5 -y -colorspace fcc 720fcc.mp4 For me that doesn't work in Windows. The color in VLC player is 18,190,18 for height=576 and 13,163,11 for height=720. It doesn't help if I specify -color_trc, -color_primaries and -color_range. In VLC player are functions Tools / Media Information and Tools / Codec information. What's shown here is exactly the same for height=576 and height=720. But the colors are 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] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)
Am 16.09.2022 um 15:20 schrieb Dan: showinfo filter shows video frame color metadata to output of console, nothing less - nothing more. showinfo cant produce incorrect video, if you ever bothered to read documentation you would know. By the way, just to clarify, I wasn't talking about the console output, but the window it opened up alongside (on the right), which showed the green was darker. Nobody is wrong. Everybody is correct. Your file is encoded so badly that it should be immediately removed from existence. In the end, I used "-colorspace fcc" which seems to have fixed the issue. Please show your complete command line. Because for me it doesn't work. Different colors for height 576 and 720. 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 13:43 schrieb Dan: On Thu, 15 Sep 2022 12:07:08 +0100, Michael Koch wrote: Am 15.09.2022 um 11:53 schrieb Dan: This seems to work with VLC player: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 Unfortunately, doesn't work for me in MPC or Chrome. Can you try a height of 720 instead of 578 to see if that fails for you? Please try this, for me it works with VLC player, the color is exactly the same: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -color_primaries bt709 -color_trc bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x720 -colorspace bt709 -color_primaries bt709 -color_trc bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 Sure. The colour is both the same now (for both Chrome and MPC), except it's the darker, wrong colour (green=164 instead of 190). Try some other values instead of "bt709". ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 11:53 schrieb Dan: This seems to work with VLC player: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 Unfortunately, doesn't work for me in MPC or Chrome. Can you try a height of 720 instead of 578 to see if that fails for you? Please try this, for me it works with VLC player, the color is exactly the same: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -color_primaries bt709 -color_trc bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x720 -colorspace bt709 -color_primaries bt709 -color_trc bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 11:53 schrieb Dan: This seems to work with VLC player: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 Unfortunately, doesn't work for me in MPC or Chrome. Can you try a height of 720 instead of 578 to see if that fails for you? Not the same color, but the difference is small. Not visible without measuring. It becomes even smaller when you add -color_primaries bt709 ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 11:41 schrieb Paul B Mahol: On 9/15/22, Michael Koch wrote: Am 15.09.2022 um 11:26 schrieb Dan: You are right that datascope shows no difference. But the issue is also reproducible with VLC player. As well as VLC Player and FFplay, I've tried MediaPlayerClassic, Google Chrome, Microsoft Edge and Vegas Pro, and the problem occurs with each of those. Could there be a "takes two to tango" thing going on, where both the players and ffmpeg are at fault due to miscommunication? It's somewhat hard to conceive they'd all interpret the file incorrectly otherwise. Only one player I tried - Irfanview - interpreted it correctly. I can't get to test it with Firefox or Waterfox unfortunately. They think the file is corrupt (output mp4 produced using the "-f lavfi -i color=0x19be0f:s=400x720" technique). Maybe there's a way around that. Also, showinfo produced an incorrect colour too. See: https://i.imgur.com/LF43udT.png (I use: "ffplay.exe -vf showinfo 576.mp4" ). In summary, I've love a workaround at least, or at least some reassurance that Chrome et al. will come round to fix this, or that ffmpeg will communicate the file better to them. This seems to work with VLC player: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 mostly because of extra -colorspace flag supplied. Wouldn't it be a good idea to show in FFprobe a message "colorspace=unknown" if colorspace isn't set? ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 11:26 schrieb Dan: You are right that datascope shows no difference. But the issue is also reproducible with VLC player. As well as VLC Player and FFplay, I've tried MediaPlayerClassic, Google Chrome, Microsoft Edge and Vegas Pro, and the problem occurs with each of those. Could there be a "takes two to tango" thing going on, where both the players and ffmpeg are at fault due to miscommunication? It's somewhat hard to conceive they'd all interpret the file incorrectly otherwise. Only one player I tried - Irfanview - interpreted it correctly. I can't get to test it with Firefox or Waterfox unfortunately. They think the file is corrupt (output mp4 produced using the "-f lavfi -i color=0x19be0f:s=400x720" technique). Maybe there's a way around that. Also, showinfo produced an incorrect colour too. See: https://i.imgur.com/LF43udT.png (I use: "ffplay.exe -vf showinfo 576.mp4" ). In summary, I've love a workaround at least, or at least some reassurance that Chrome et al. will come round to fix this, or that ffmpeg will communicate the file better to them. This seems to work with VLC player: ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -colorspace bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 11:01 schrieb Paul B Mahol: On 9/15/22, Michael Koch wrote: Am 15.09.2022 um 00:30 schrieb Paul B Mahol: On 9/15/22, Dan wrote: zscale=...,format=yuv420p O okay. I tried that before (except using two -vf commands), because I suspected you might've meant that. Just tried it again, still no luck. Let me know if I need to tweak anything: ffmpeg.exe -f lavfi -i color=0x19be0f:s=400x578 -crf 0 -vcodec libx264 -vf zscale=w=-1:h=-1,format=yuv420p -t 5 -y "578.mp4" I'm using Media Player Classic to test the colours, which breaks the pic using the 578 pixel height. Chrome actually works with both the 576 and 578 pixel height, but as soon as I change the height to 984, then both Media Player Classic AND Chrome show it broken. Datascope shows the strange and seemingly unrelated 78,4C,44 values for all three sizes, but it does that even without using zscale at all. Good, we move forward, that are real values encoded in bitstream. Anything RGB values you complain about have nothing directly related about ffmpeg. Also make sure that all software are reinterpreting your files correctly. The files need to signal correct encoded colorspace/primaries/range/etc so it can be correctly displayed on screen. Below is a Windows batch file for reproducing with FFplay. I did use the latest version from Gyan. The color difference is clearly visible. Looks like you had hard time understanding text you quoted above. ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -vf zscale,setrange=full,format=yuv420p -colorspace bt709 -color_primaries bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -vf zscale,setrange=full,format=yuv420p -colorspace bt709 -color_primaries bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 start ffplay -left 0 -top 0 out1.mp4 start ffplay -left 400 -top 0 out2.mp4 When inspecting the files with FFprobe or ExifTool, I see no differences except height and small differences in bitrate and filesize. ffplay is broken/buggy and should not be used here, it will display differently stuff all the time, and uses SDL library by default for video output. Using datascope filter it clearly shows pixels are exactly same. You are right that datascope shows no difference. But the issue is also reproducible with VLC player. ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 15.09.2022 um 00:30 schrieb Paul B Mahol: On 9/15/22, Dan wrote: zscale=...,format=yuv420p O okay. I tried that before (except using two -vf commands), because I suspected you might've meant that. Just tried it again, still no luck. Let me know if I need to tweak anything: ffmpeg.exe -f lavfi -i color=0x19be0f:s=400x578 -crf 0 -vcodec libx264 -vf zscale=w=-1:h=-1,format=yuv420p -t 5 -y "578.mp4" I'm using Media Player Classic to test the colours, which breaks the pic using the 578 pixel height. Chrome actually works with both the 576 and 578 pixel height, but as soon as I change the height to 984, then both Media Player Classic AND Chrome show it broken. Datascope shows the strange and seemingly unrelated 78,4C,44 values for all three sizes, but it does that even without using zscale at all. Good, we move forward, that are real values encoded in bitstream. Anything RGB values you complain about have nothing directly related about ffmpeg. Also make sure that all software are reinterpreting your files correctly. The files need to signal correct encoded colorspace/primaries/range/etc so it can be correctly displayed on screen. Below is a Windows batch file for reproducing with FFplay. I did use the latest version from Gyan. The color difference is clearly visible. ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -vf zscale,setrange=full,format=yuv420p -colorspace bt709 -color_primaries bt709 -crf 0 -vcodec libx264 -t 5 -y out1.mp4 ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -vf zscale,setrange=full,format=yuv420p -colorspace bt709 -color_primaries bt709 -crf 0 -vcodec libx264 -t 5 -y out2.mp4 start ffplay -left 0 -top 0 out1.mp4 start ffplay -left 400 -top 0 out2.mp4 When inspecting the files with FFprobe or ExifTool, I see no differences except height and small differences in bitrate and filesize. ___ 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 14.09.2022 um 19:00 schrieb Dan: That's a great idea to use specified colours directly supported by ffmpeg and helps narrow down the issue a lot! Would you count this as a bug? It seems to be a bug. If this is a known legacy quirk, it seems one of the ugliest and most misleading quirks I have seen in a while, and I could imagine being responsible for wasting thousands of hours of thought based upon mis-diagnosed colour-profiling assumptions. I've spoken with two separate long-time video professionals so far, and they were both convinced this was a colour profile thing and that my source images were the problem, and not ffmpeg's behaviour, despite saying I checked both BMPs in a hex editor, and they were byte-identical (other than resolution/filesize). Are you using Windows per chance? yes, I did also test on Windows. To make things even more confusing, one of the aforementioned pros says he can't spot a difference on his non-Windows system (presuming Mac, could be Linux) between the two output mp4s' colours. The crazy thing is when you vertically stack the two videos together, then the colors become again identical in the output: ffmpeg -i out1.mp4 -i out2.mp4 -lavfi vstack -y out.mp4 Sorry, I have no idea for a solution or workaround. 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 MP4/x264 output colours change when input source is different resolution (bug?)
Am 14.09.2022 um 11:21 schrieb Dan:
Using the latest 5.1.1 "essentials build" by www.gyan.dev.
Hi all, I'm a beginner to ffmpeg so I'm having a hard time believing
that a utility so old and so widely used has such a fundamental bug,
but the evidence is staring me in the face and leads me to no other
conclusion.
It's incredibly easy to replicate thankfully. I want to convert
numerous frames to make an animation, but thankfully, I've simplified
the problem to even using a single image to make a '1 frame video' for
the purposes of debugging.
Simply perform this command line:
ffmpeg.exe -i original.png -crf 0 -vcodec libx264 output.mp4
...With this "original.png" ("fC2Tj") image:
https://i.stack.imgur.com/5jkct.png
And this command line:
ffmpeg.exe -i doubleHeight.png -crf 0 -vcodec libx264 output.mp4
...On this "doubleHeight" ("RGIvA") image:
https://i.stack.imgur.com/PLdsb.png
The double height version is darker than it should be. I've checked
the resulting video in both Media Player Classic and Chrome.
The issue can be reproduced without input images as follows:
ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -crf 0 -vcodec libx264 -t 5
-y out1.mp4
ffmpeg -f lavfi -i color=0x19be0f:s=400x578 -crf 0 -vcodec libx264 -t 5
-y out2.mp4
The color seems to be brighter if the height is 576 or smaller, and
darker if the height is 578 or larger.
It's clearly visible if you play both videos side by side. I did test
with VLC Player and FFplay. I don't see how zscale could fix this issue.
Michael
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Re: [FFmpeg-devel] [PATCH]lavfi/rotate: Fix undefined behaviour
/Also, shouldn't the same change be done also to interpolate_bilinear8? / I was unable to reproduce with 8-bit input. When I tested it, the issue was reproducible only with 14-bit and 16-bit input. 12-bit did work. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] multiple flat videos in a equirectangular projection - v360 filter
Am 17.07.2022 um 12:09 schrieb Denis Połeć: Am 16.07.2022 um 22:12 schrieb Michael Koch : Am 16.07.2022 um 20:57 schrieb Denis Połeć: Am 16.07.2022 um 11:46 schrieb Paul B Mahol : On Sat, Jul 16, 2022 at 11:22 AM Denis Połeć wrote: Hello, I wouldn't call myself a beginner, but I still need a little bit to become a pro. :) I have a question that might be easy to answer. I am working on a script to bring multiple flat videos into a equirectangular projection by using v360 filter. I have the problem that the edges of the input are very jagged. This did not lead to a good result when I play the equirectangular projection in a 360 player. I have also already tried different interpolation modes, which does not lead to a better result. Does anyone have an idea how I can avoid that? Is there a better way to do this task? Here is an example code with the result. The video in the example has a resolution of 1080p: ffmpeg -i BRAIN.mp4 -lavfi "\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw='0':alpha_mask=1[fg1];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:alpha_mask=1[fg2];[fg2][fg1]overlay[a];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:alpha_mask=1[fg3];[fg3][a]overlay[b];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:alpha_mask=1[fg4];[fg4][b]overlay[c];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=45:alpha_mask=1[fg5];[fg5][c]overlay[d];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=45:alpha_mask=1[fg6];[fg6][d]overlay[e];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=-45:alpha_mask=1[fg7];[fg7][e]overlay[f];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=-45:alpha_mask=1[fg8];[fg8][f]overlay[g];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-45:alpha_mask=1[fg9];[fg9][g]overlay[h];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=-45:alpha_mask=1[fg10];[fg10][h]overlay[i];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=45:alpha_mask=1[fg11];[fg11][i]overlay[j];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=45:alpha_mask=1[fg12];[fg12][j]overlay[k];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=90:alpha_mask=1[fg13];[fg13][k]overlay[l];\ [0]drawbox=w=1:h=1:color=black,v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-90:alpha_mask=1[fg14];[fg14][l]overlay" -q:v 4 -vframes 1 -y test11.jpg Your filtergraph is extremely inefficient with that many cascaded overlays and gives poor results. For proper stitching borders need to have small transition from full opacity to no opacity. To add small transitions with opacity on borders could use blurring filters for example on alpha plane only. How could I achieve that? How can I blurry just the borders? You could apply some preprocessing to your input video, before you feed it to your script. The trick is to multiply all pixels at the edges by 0.5. This can be done with a white mask which has gray pixels at the edge. Thank you for your reply. ffmpeg -f lavfi -i color=color=white:size=1920x1080 -lavfi drawbox=color=gray:t=1 -frames 1 -y mask.png This works. ffmpeg -f lavfi -i testsrc2=size=1920x1080 -i mask.png -lavfi multiply=offset=0 -frames 1 -y test.png But ffmpeg says multiply filter doesn’t exist. I tried that: ffmpeg -f lavfi -i testsrc2=size=1920x1080 -i mask.png -lavfi blend=all_mode=multiply -frames 1 -y test.png output gets green. Convert the pixel format of both inputs to RGB24 before using the blend filter. Multiply makes no sense in YUV format. 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] multiple flat videos in a equirectangular projection - v360 filter
Am 17.07.2022 um 12:09 schrieb Denis Połeć: Am 16.07.2022 um 22:12 schrieb Michael Koch : Am 16.07.2022 um 20:57 schrieb Denis Połeć: Am 16.07.2022 um 11:46 schrieb Paul B Mahol : On Sat, Jul 16, 2022 at 11:22 AM Denis Połeć wrote: Hello, I wouldn't call myself a beginner, but I still need a little bit to become a pro. :) I have a question that might be easy to answer. I am working on a script to bring multiple flat videos into a equirectangular projection by using v360 filter. I have the problem that the edges of the input are very jagged. This did not lead to a good result when I play the equirectangular projection in a 360 player. I have also already tried different interpolation modes, which does not lead to a better result. Does anyone have an idea how I can avoid that? Is there a better way to do this task? Here is an example code with the result. The video in the example has a resolution of 1080p: ffmpeg -i BRAIN.mp4 -lavfi "\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw='0':alpha_mask=1[fg1];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:alpha_mask=1[fg2];[fg2][fg1]overlay[a];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:alpha_mask=1[fg3];[fg3][a]overlay[b];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:alpha_mask=1[fg4];[fg4][b]overlay[c];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=45:alpha_mask=1[fg5];[fg5][c]overlay[d];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=45:alpha_mask=1[fg6];[fg6][d]overlay[e];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=-45:alpha_mask=1[fg7];[fg7][e]overlay[f];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=-45:alpha_mask=1[fg8];[fg8][f]overlay[g];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-45:alpha_mask=1[fg9];[fg9][g]overlay[h];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=-45:alpha_mask=1[fg10];[fg10][h]overlay[i];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=45:alpha_mask=1[fg11];[fg11][i]overlay[j];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=45:alpha_mask=1[fg12];[fg12][j]overlay[k];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=90:alpha_mask=1[fg13];[fg13][k]overlay[l];\ [0]drawbox=w=1:h=1:color=black,v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-90:alpha_mask=1[fg14];[fg14][l]overlay" -q:v 4 -vframes 1 -y test11.jpg Your filtergraph is extremely inefficient with that many cascaded overlays and gives poor results. For proper stitching borders need to have small transition from full opacity to no opacity. To add small transitions with opacity on borders could use blurring filters for example on alpha plane only. How could I achieve that? How can I blurry just the borders? You could apply some preprocessing to your input video, before you feed it to your script. The trick is to multiply all pixels at the edges by 0.5. This can be done with a white mask which has gray pixels at the edge. Thank you for your reply. ffmpeg -f lavfi -i color=color=white:size=1920x1080 -lavfi drawbox=color=gray:t=1 -frames 1 -y mask.png This works. ffmpeg -f lavfi -i testsrc2=size=1920x1080 -i mask.png -lavfi multiply=offset=0 -frames 1 -y test.png But ffmpeg says multiply filter doesn’t exist. Get a newer version. The multiply filter was added not so long ago. 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] multiple flat videos in a equirectangular projection - v360 filter
Am 16.07.2022 um 20:57 schrieb Denis Połeć: Am 16.07.2022 um 11:46 schrieb Paul B Mahol : On Sat, Jul 16, 2022 at 11:22 AM Denis Połeć wrote: Hello, I wouldn't call myself a beginner, but I still need a little bit to become a pro. :) I have a question that might be easy to answer. I am working on a script to bring multiple flat videos into a equirectangular projection by using v360 filter. I have the problem that the edges of the input are very jagged. This did not lead to a good result when I play the equirectangular projection in a 360 player. I have also already tried different interpolation modes, which does not lead to a better result. Does anyone have an idea how I can avoid that? Is there a better way to do this task? Here is an example code with the result. The video in the example has a resolution of 1080p: ffmpeg -i BRAIN.mp4 -lavfi "\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw='0':alpha_mask=1[fg1];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:alpha_mask=1[fg2];[fg2][fg1]overlay[a];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:alpha_mask=1[fg3];[fg3][a]overlay[b];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:alpha_mask=1[fg4];[fg4][b]overlay[c];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=45:alpha_mask=1[fg5];[fg5][c]overlay[d];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=45:alpha_mask=1[fg6];[fg6][d]overlay[e];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=-45:alpha_mask=1[fg7];[fg7][e]overlay[f];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=-45:alpha_mask=1[fg8];[fg8][f]overlay[g];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-45:alpha_mask=1[fg9];[fg9][g]overlay[h];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=-45:alpha_mask=1[fg10];[fg10][h]overlay[i];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=45:alpha_mask=1[fg11];[fg11][i]overlay[j];\ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=45:alpha_mask=1[fg12];[fg12][j]overlay[k];\ \ [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=90:alpha_mask=1[fg13];[fg13][k]overlay[l];\ [0]drawbox=w=1:h=1:color=black,v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-90:alpha_mask=1[fg14];[fg14][l]overlay" -q:v 4 -vframes 1 -y test11.jpg Your filtergraph is extremely inefficient with that many cascaded overlays and gives poor results. For proper stitching borders need to have small transition from full opacity to no opacity. To add small transitions with opacity on borders could use blurring filters for example on alpha plane only. How could I achieve that? How can I blurry just the borders? You could apply some preprocessing to your input video, before you feed it to your script. The trick is to multiply all pixels at the edges by 0.5. This can be done with a white mask which has gray pixels at the edge. ffmpeg -f lavfi -i color=color=white:size=1920x1080 -lavfi drawbox=color=gray:t=1 -frames 1 -y mask.png ffmpeg -f lavfi -i testsrc2=size=1920x1080 -i mask.png -lavfi multiply=offset=0 -frames 1 -y test.png Then use test.png as input for your script. 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] Multiple xfade in one run
Am 04.07.2022 um 18:46 schrieb Cecil Westerhof via ffmpeg-user: Paul B Mahol writes: On Mon, Jul 4, 2022 at 6:15 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: Some time ago I was experimenting with xfade. I wanted to know how to use several in one run. Now I really needed it, so I did some digging and found this: ffmpeg -y \ -i input0.mkv \ -i input1.mkv \ -i input2.mkv \ -i input3.mkv \ -i input4.mkv \ -i input5.mkv \ -i input6.mkv \ -i input7.mkv \ -i input8.mkv \ -i input9.mkv \ -vcodec libx264 \ -crf26\ -preset veryfast \ -filter_complex " [0:a][1:a] acrossfade=d=4[a1]; [0:v][1:v] xfade=transition=hlslice: duration=4: offset=308[v1]; [a1][2:a] acrossfade=d=4[a2]; [v1][2:v] xfade=transition=vertopen: duration=4: offset=357[v2]; [a2][3:a] acrossfade=d=4[a3]; [v2][3:v] xfade=transition=circlecrop: duration=4: offset=533[v3]; [a3][4:a] acrossfade=d=4[a4]; [v3][4:v] xfade=transition=rectcrop: duration=4: offset=1016[v4]; [a4][5:a] acrossfade=d=4[a5]; [v4][5:v] xfade=transition=slideup: duration=4: offset=1158[v5]; [a5][6:a] acrossfade=d=4[a6]; [v5][6:v] xfade=transition=wiperight: duration=4: offset=1473[v6]; [a6][7:a] acrossfade=d=4[a7]; [v6][7:v] xfade=transition=horzclose: duration=4: offset=1661[v7]; [a7][8:a] acrossfade=d=4[a8]; [v7][8:v] xfade=transition=diagbl: duration=4: offset=2082[v8]; [a8][9:a] acrossfade=d=4[a9]; [v8][9:v] xfade=transition=slideright: duration=4: offset=2211[v9] " \ -map '[v9]' -map '[a9]' \ output.mkv I hope there are better ways, because there are some problems with it. For example it needs a lot of memory. (24 GB) Could use (a)movie filters and only use such filter when actually needed in graph. I am concerning ffmpeg still a newbie. What do you mean by this? I also didn't understand 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] show an image with FFplay for 5 seconds
Am 01.07.2022 um 16:03 schrieb Michael Koch: Hello, is it possible to show an image with FFplay for 5 seconds, and then exit? I did try this command in a Windows batch file, but it doesn't stop after 5 seconds. I drag and drop the image on the batch file: ffplay -autoexit -loop 0 -t 5 %1 A workaround with -loop 125 works. The problem in my first command line seems to be that -loop 0 has a higher priority than -t 5. Shouldn't the -t option have higher priority? 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] show an image with FFplay for 5 seconds
Hello, is it possible to show an image with FFplay for 5 seconds, and then exit? I did try this command in a Windows batch file, but it doesn't stop after 5 seconds. I drag and drop the image on the batch file: ffplay -autoexit -loop 0 -t 5 %1 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] remap with pixel interpolation
Am 29.06.2022 um 09:15 schrieb Paul B Mahol: On Wed, Jun 29, 2022 at 8:56 AM Michael Koch wrote: Suggestion for improvement: Add pixel interpolation to the remap filter. For example if the output size is 800x600, multiply the values in the mapping files by 16 so that the range is 12800x9600, and use the 4 least significant bits for pixel interpolation. Very bad suggestion. Better make remap filter use float pixel format for map files. Which image format supports float grayscale? 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] remap with pixel interpolation
Suggestion for improvement: Add pixel interpolation to the remap filter. For example if the output size is 800x600, multiply the values in the mapping files by 16 so that the range is 12800x9600, and use the 4 least significant bits for pixel interpolation. 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] xfade
Hi, I don't understand the examples in https://trac.ffmpeg.org/wiki/Xfade If the first input has length 5s and the offset is 4.5s and the duration is 1s, then from where comes the first input between t=5s and t=5.5s? 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] Using several audios after each-other in a video
FMA3 BMI1 [libx264 @ 0x55ce8345ab40] profile High, level 3.2, 4:2:0, 8-bit [libx264 @ 0x55ce8345ab40] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - h ttp://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_p skip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bl uray_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 q comp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'sander2.mp4': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x960 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc58.91.100 aac [swscaler @ 0x55ce83cb8ec0] deprecated pixel format used, make sure you did set range correctly [swscaler @ 0x55ce840a0900] deprecated pixel format used, make sure you did set range correctly [image2 @ 0x55ce8343e0c0] Thread message queue blocking; consider raising the thread_queue_size option (c urrent value: 8) [swscaler @ 0x55ce84215400] deprecated pixel format used, make sure you did set range correctly . . . frame=12388 fps= 27 q=-1.0 Lsize= 86187kB time=00:08:15.40 bitrate=1425.2kbits/s speed=1.08x video:84124kB audio:1878kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.214622% [libx264 @ 0x55ce8345ab40] frame I:50Avg QP:16.28 size:315675 [libx264 @ 0x55ce8345ab40] frame P:5756 Avg QP:20.62 size: 12073 [libx264 @ 0x55ce8345ab40] frame B:6582 Avg QP:22.45 size: 131 [libx264 @ 0x55ce8345ab40] consecutive B-frames: 28.2% 2.4% 1.7% 67.7% [libx264 @ 0x55ce8345ab40] mb I I16..4: 11.1% 59.1% 29.8% [libx264 @ 0x55ce8345ab40] mb P I16..4: 0.1% 0.3% 0.0% P16..4: 31.9% 4.1% 7.0% 0.0% 0.0%skip :56.6% [libx264 @ 0x55ce8345ab40] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 2.4% 0.0% 0.0% direct: 0.0% skip :97.6% L0:13.0% L1:85.8% BI: 1.2% [libx264 @ 0x55ce8345ab40] 8x8 transform intra:65.0% inter:61.4% [libx264 @ 0x55ce8345ab40] coded y,uvDC,uvAC intra: 66.5% 70.1% 56.9% inter: 10.3% 11.4% 2.1% [libx264 @ 0x55ce8345ab40] i16 v,h,dc,p: 65% 10% 7% 19% [libx264 @ 0x55ce8345ab40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 17% 24% 6% 6% 6% 8% 7% 9% [libx264 @ 0x55ce8345ab40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 17% 9% 8% 10% 9% 11% 10% 12% [libx264 @ 0x55ce8345ab40] i8c dc,h,v,p: 60% 18% 13% 8% [libx264 @ 0x55ce8345ab40] Weighted P-Frames: Y:10.7% UV:7.2% [libx264 @ 0x55ce8345ab40] ref P L0: 68.7% 25.7% 5.3% 0.3% 0.0% [libx264 @ 0x55ce8345ab40] ref B L0: 92.4% 7.1% 0.5% [libx264 @ 0x55ce8345ab40] ref B L1: 89.3% 10.7% [libx264 @ 0x55ce8345ab40] kb/s:1390.74 [aac @ 0x55ce8347e7c0] Qavg: 533.159 -- ** 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] streamselect in a realtime application
Am 16.06.2022 um 09:33 schrieb Gyan Doshi: On 2022-06-16 12:45 pm, Michael Koch wrote: I would like to understand why in some cases -loop 1 is required before the input files, and in some cases it can be omitted. -loop option is specific to the image sequence demuxer. Without it, a single image input is a video stream of 1 frame length. But why does this example work without -loop 1? Is it an undocumented feature of the remap filter, that it keeps the last mapping file alive? ffmpeg -i in.mp4 -i xmap.pgm -i ymap.pgm -lavfi [0][1][2]remap out.mp4 You would apply loop when you need to keep alive an image sequence input at a timestamp beyond its natural length, usually a fade. With the tpad or loop filters, this can be done inside a filtergraph instead of at the demuxer level. Which method is better, -loop 1 before the input file, or doing it in the filtergraph? 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] streamselect in a realtime application
Am 13.06.2022 um 22:20 schrieb Michael Koch: Hello, I'm using FFmpeg for a realtime wormhole simulation in a planetarium. There are two inputs: a) An equirectangular video for the environment. b) A realtime stream from a 360° camera, this is mapped inside the wormhole. Both inputs are stitched together with xstack, and then a suitable remap function is applied. The output is in fisheye format and streamed to the planetarium projector. So far, that's working fine. But I also want to switch the wormhole on and off at certain times (t1 and t2). To do this, I did try two approaches: Approach 1: Two streams are generated, one without and the other with wormhole. Then one of them is selected by a streamselect filter. The drawback of this approach is that double CPU power is required. Both streams must be generated by remap filters, although only one of them is used. Approach 2: I use two sets of xmap and ymap files for the remap filter. One set without and the other set with wormhole: [xmap1][xmap2]streamselect@1=map=0[xmap];[ymap1][ymap2]streamselect@2=map=0[ymap];[a][xmap][ymap]remap... The drawback of this approach is that I must use -loop 1 before each of the four mapping file inputs. Which means the files are reloaded for each frame. This is a huge waste of time. If I don't use -loop 1, then it seems the streamselect filters don't work. I would like to understand why in some cases -loop 1 is required before the input files, and in some cases it can be omitted. This works without -loop 1: ffmpeg -i in.mp4 -i xmap.pgm -i ymap.pgm -lavfi [0][1][2]remap out.mp4 When I use streamselect to select one of two mapping files, it doesn't work. There is no error message, but it's always the first input used, regardless which commands I send to the streamselect filers: ffmpeg -i in.mp4 -i x1.pgm -i x2.pgm -i y1.pgm -i y2.pgm -lavfi [1][2]streamselect@1=map=0[xmap];[3][4]streamselect@2=map=0[ymap];[0][xmap][ymap]remap out.mp4 However the same example does work when I add -loop 1 before each mapping file: ffmpeg -i in.mp4 -loop 1 -i x1.pgm -loop 1 -i x2.pgm -loop 1 -i y1.pgm -loop 1 -i y2.pgm -lavfi [1][2]streamselect@1=map=0[xmap];[3][4]streamselect@2=map=0[ymap];[0][xmap][ymap]remap out.mp4 Another question: Does -loop 1 mean the file is reloaded from disk for each frame? Or is it copied from an internal buffer? 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] Use concat filter with a fade
Am 14.06.2022 um 16:30 schrieb Cecil Westerhof via ffmpeg-user:
Michael Koch writes:
Am 14.06.2022 um 15:33 schrieb Cecil Westerhof via ffmpeg-user:
Michael Koch writes:
Am 14.06.2022 um 13:47 schrieb Cecil Westerhof via ffmpeg-user:
Sometimes I have to cut parts out of a video. I now use for this (bash on
Debian):
ffmpeg -y\
-ss ${videoStart} -to ${cutStart} -i ${inputFile} \
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile} \
-vcodec libx264 \
-crf26\
-acodec libmp3lame -qscale:a 9\
-preset veryfast \
-lavfi "concat=n=2:v=1:a=1" \
-an ${outputFile}
But the cut from one part to another is a bit abrupt. Is there a
possibility to smooth it with something like a fade?
you can use the xfade filter. :
https://www.ffmpeg.org/ffmpeg-all.html#xfade
https://trac.ffmpeg.org/wiki/Xfade
I am now using:
offset=$((${cutStart} - ${videoStart} - ${duration}))
xfade=xfade=transition=slideleft:duration=${duration}:offset=${offset}
time ffmpeg -y \
-ss ${videoStart} -to ${cutStart} -i ${inputFile}\
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile}\
-vcodec libx264 \
-crf26 \
-acodec libmp3lame -qscale:a 9 \
-preset veryfast \
-filter_complex ${xfade} \
${outputFile}
But I have a major and minor problem.
The major problem is that I do not have audio from the second part of
the video.
Audio has its own filter: acrossfade
This seems to work:
xfade="xfade=transition=slideleft:duration=${duration}:offset=${offset};acrossfade=d=${duration}"
The minor problem is that I have to calculate the offset. It would be
nice if I could use -duration, but that does not work sadly.
As far as I know this isn't yet implemented.
That sounds like it is going to be implemented. Or do I read to much
in this sentence?
I really don't know.
Michael
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Re: [FFmpeg-user] Use concat filter with a fade
Am 14.06.2022 um 15:33 schrieb Cecil Westerhof via ffmpeg-user:
Michael Koch writes:
Am 14.06.2022 um 13:47 schrieb Cecil Westerhof via ffmpeg-user:
Sometimes I have to cut parts out of a video. I now use for this (bash on
Debian):
ffmpeg -y\
-ss ${videoStart} -to ${cutStart} -i ${inputFile} \
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile} \
-vcodec libx264 \
-crf26\
-acodec libmp3lame -qscale:a 9\
-preset veryfast \
-lavfi "concat=n=2:v=1:a=1" \
-an ${outputFile}
But the cut from one part to another is a bit abrupt. Is there a
possibility to smooth it with something like a fade?
you can use the xfade filter. :
https://www.ffmpeg.org/ffmpeg-all.html#xfade
https://trac.ffmpeg.org/wiki/Xfade
I am now using:
offset=$((${cutStart} - ${videoStart} - ${duration}))
xfade=xfade=transition=slideleft:duration=${duration}:offset=${offset}
time ffmpeg -y \
-ss ${videoStart} -to ${cutStart} -i ${inputFile}\
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile}\
-vcodec libx264 \
-crf26 \
-acodec libmp3lame -qscale:a 9 \
-preset veryfast \
-filter_complex ${xfade} \
${outputFile}
But I have a major and minor problem.
The major problem is that I do not have audio from the second part of
the video.
Audio has its own filter: acrossfade
The minor problem is that I have to calculate the offset. It would be
nice if I could use -duration, but that does not work sadly.
As far as I know this isn't yet implemented.
By the way: how should I do it when I want to use five parts of the video?
I haven't tested this, but I think you must build a binary tree:
[0:v][1:v]xfade[a];[2:v][3:v]xfade[b];[a][b]xfade
Michael
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Re: [FFmpeg-user] Use concat filter with a fade
Am 14.06.2022 um 13:47 schrieb Cecil Westerhof via ffmpeg-user:
Sometimes I have to cut parts out of a video. I now use for this (bash on
Debian):
ffmpeg -y\
-ss ${videoStart} -to ${cutStart} -i ${inputFile} \
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile} \
-vcodec libx264 \
-crf26\
-acodec libmp3lame -qscale:a 9\
-preset veryfast \
-lavfi "concat=n=2:v=1:a=1" \
-an ${outputFile}
But the cut from one part to another is a bit abrupt. Is there a
possibility to smooth it with something like a fade?
you can use the xfade filter. :
https://www.ffmpeg.org/ffmpeg-all.html#xfade
https://trac.ffmpeg.org/wiki/Xfade
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] streamselect in a realtime application
Hello, I'm using FFmpeg for a realtime wormhole simulation in a planetarium. There are two inputs: a) An equirectangular video for the environment. b) A realtime stream from a 360° camera, this is mapped inside the wormhole. Both inputs are stitched together with xstack, and then a suitable remap function is applied. The output is in fisheye format and streamed to the planetarium projector. So far, that's working fine. But I also want to switch the wormhole on and off at certain times (t1 and t2). To do this, I did try two approaches: Approach 1: Two streams are generated, one without and the other with wormhole. Then one of them is selected by a streamselect filter. The drawback of this approach is that double CPU power is required. Both streams must be generated by remap filters, although only one of them is used. Approach 2: I use two sets of xmap and ymap files for the remap filter. One set without and the other set with wormhole: [xmap1][xmap2]streamselect@1=map=0[xmap];[ymap1][ymap2]streamselect@2=map=0[ymap];[a][xmap][ymap]remap... The drawback of this approach is that I must use -loop 1 before each of the four mapping file inputs. Which means the files are reloaded for each frame. This is a huge waste of time. If I don't use -loop 1, then it seems the streamselect filters don't work. Any ideas how this could be made faster? 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] concat audio files
Am 11.06.2022 um 11:46 schrieb Nicolas George: Michael Koch (12022-06-11): I always get this error message: Stream specifier '' in filtergraph description [0][1]concat=n=2:a=1 matches no streams. Where did you find this "[number]" syntax, and has it ever worked for you? yes, it works after I added v=0. Isn't this the normal syntax to specify the two inputs of the concat filter? In this case [0][1] could be omitted because there are only these two inputs. [0:0][1:0] does also work. 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] concat audio files
Am 11.06.2022 um 11:45 schrieb Gyan Doshi: On 2022-06-11 03:02 pm, Michael Koch wrote: I want to concat two audio files. What's wrong with this command line? ffmpeg -i birds1.wav -i birds1.wav -lavfi [0][1]concat=n=2:a=1 -c:a aac -y sound.mp4 Default value for concat v is 1. So you need to set it to 0. concat=n=2:a=1:v=0 oh yes, that's it. 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] concat audio files
I want to concat two audio files. What's wrong with this command line? ffmpeg -i birds1.wav -i birds1.wav -lavfi [0][1]concat=n=2:a=1 -c:a aac -y sound.mp4 I always get this error message: Stream specifier '' in filtergraph description [0][1]concat=n=2:a=1 matches no streams. The console output is below. Michael D:\Bochum\audio>ffmpeg -i birds1.wav -i birds1.wav -lavfi [0][1]concat=n=2:a=1 -c:a aac -y sound.mp4 ffmpeg version 2022-06-06-git-73302aa193-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 11.3.0 (Rev1, 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-bzlib --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-mediafoundation --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 57. 26.100 / 57. 26.100 libavcodec 59. 33.100 / 59. 33.100 libavformat 59. 24.100 / 59. 24.100 libavdevice 59. 6.100 / 59. 6.100 libavfilter 8. 40.100 / 8. 40.100 libswscale 6. 6.100 / 6. 6.100 libswresample 4. 6.100 / 4. 6.100 libpostproc 56. 5.100 / 56. 5.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, wav, from 'birds1.wav': Duration: 00:02:01.97, bitrate: 2116 kb/s Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32 (24 bit), 2116 kb/s Guessed Channel Layout for Input Stream #1.0 : stereo Input #1, wav, from 'birds1.wav': Duration: 00:02:01.97, bitrate: 2116 kb/s Stream #1:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32 (24 bit), 2116 kb/s Stream specifier '' in filtergraph description [0][1]concat=n=2:a=1 matches no streams. ___ 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] Please increase the number of variables
Am 03.06.2022 um 17:30 schrieb Paul B Mahol: On Fri, Jun 3, 2022 at 5:05 PM Michael Koch wrote: Hello, I'd like to ask if the number of variables in expressions could be increased from 10 to 25 please. I mean the st() and ld() functions. I'm just programming a realtime wormhole simulation and the limitation to 10 variables is becoming nasty. I did already begin to re-use the same variables for different things, but that makes debugging complicated. It would be so much easier to have more variables and use each one only for one thing. What you see below is only a small part of the code. Why you doing that way, this is the most inefficient way to do it. How would you do it instead? Sure, it's possible to generate the mapping files with C or C# code. Pro C code: + No limit for the number of variables. + The code can be commented in the same line. + It's very helpful to get error messages for division by zero, sqrt(-1), asin(2), log(0), log(-1). Pro FFmpeg code in batch file: + A whole project can be written in one batch file and executed with just one double-click. No compiler required. + The mapping files are automatically generated in the correct working folder, no problems with files in wrong folder. In the meantime I got the code for a realtime wormhole (with fisheye projection in a planetarium) running with just 10 variables (see below). I had to re-use some of the variables, which is error-prone. I also had to use many if/ifnot functions to avoid overwriting of variables. With 12 variables the code would have been simpler. I have some ideas for even more complex transformations, but with the limitation to just 10 variables they are impossible to implement. Michael ffmpeg -f lavfi -i nullsrc=size=%OUT_W%x%OUT_H% -vf format=pix_fmts=gray16le,geq='^ st(0,%OUT_H_FOV%/180*((2*X+1)/%OUT_W%-1));^ st(1,%OUT_V_FOV%/180*((2*Y+1)/%OUT_H%-1));^ st(2,atan2(ld(1),ld(0)));^ st(3,PI/2*hypot(ld(0),ld(1)));^ st(4,sin(ld(3))*cos(ld(2)));^ st(5,sin(ld(3))*sin(ld(2)));^ st(6,cos(ld(3)));^ st(1,if(lt(ld(6),cos(%OUT_H_FOV%/360*PI)),32767,0));^ st(0,ld(5)*cos(%PITCH2%/180*PI)-ld(6)*sin(%PITCH2%/180*PI));^ st(6,ld(6)*cos(%PITCH2%/180*PI)+ld(5)*sin(%PITCH2%/180*PI));^ st(5,ld(0));^ st(7,atan2(ld(5),ld(4)));^ st(8,acos(ld(6)));^ st(9,if(lte(ld(8),%RS%/180*PI),1));^ if(ld(9),st(7,ld(8)*cos(ld(7;^ ifnot(ld(9),st(8,ld(8)-%S%*(2*%RS%/180*PI/(ld(8)-%RS%/180*PI;^ ifnot(ld(9),st(4,sin(ld(8))*cos(ld(7;^ ifnot(ld(9),st(5,sin(ld(8))*sin(ld(7;^ ifnot(ld(9),st(6,cos(ld(8;^ ifnot(ld(9),st(0,ld(5)*cos(%PITCH1%/180*PI)-ld(6)*sin(%PITCH1%/180*PI)));^ ifnot(ld(9),st(6,ld(6)*cos(%PITCH1%/180*PI)+ld(5)*sin(%PITCH1%/180*PI)));^ ifnot(ld(9),st(5,ld(0)));^ ifnot(ld(9),st(7,atan2(ld(5),ld(4;^ ifnot(ld(9),st(8,acos(ld(6;^ ifnot(ld(9),st(7,atan2(sin(ld(8))*cos(ld(7)),cos(ld(8);^ if(ld(9),0.5*%IN_W2%*(1+180/PI/%RS%*ld(7)),ld(1)+0.5*%IN_W%*(1+ld(7)/PI))' -frames 1 -y xmap.pgm ___ 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] between(x,min,max)
The function between(x,min,max) is definded as: "Return 1 if x is greater than or equal to min and less than or equal to max, 0 otherwise." In some cases it would be useful to have a similar function (with a different name) which doesn't include the maximum: "Return 1 if x is greater than or equal to min and less than max, 0 otherwise." This would be useful if a function is defined segment-wise: ld(0)*between(t,0,10)+ld(1)*between(t,10,20)+... The problem is at t=10, where both "between" functions become true. Sure, there are workarounds to solve this problem, but a new "between2" function would make things easier. 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] Please increase the number of variables
Am 03.06.2022 um 17:30 schrieb Paul B Mahol: On Fri, Jun 3, 2022 at 5:05 PM Michael Koch wrote: Hello, I'd like to ask if the number of variables in expressions could be increased from 10 to 25 please. I mean the st() and ld() functions. I'm just programming a realtime wormhole simulation and the limitation to 10 variables is becoming nasty. I did already begin to re-use the same variables for different things, but that makes debugging complicated. It would be so much easier to have more variables and use each one only for one thing. What you see below is only a small part of the code. Why you doing that way, this is the most inefficient way to do it. Computing time doesn't care in this case. The code is only generating the mapping files for the remap filter. In the realtime part of the simulation are no complicated functions. I can solve the problem with just 10 variables, but it would be much easier (and better readable code) if more variables were available. 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".
[FFmpeg-user] Please increase the number of variables
Hello, I'd like to ask if the number of variables in expressions could be increased from 10 to 25 please. I mean the st() and ld() functions. I'm just programming a realtime wormhole simulation and the limitation to 10 variables is becoming nasty. I did already begin to re-use the same variables for different things, but that makes debugging complicated. It would be so much easier to have more variables and use each one only for one thing. What you see below is only a small part of the code. Thanks, Michael ffmpeg -f lavfi -i nullsrc=size=%OUT_W%x%OUT_H% -vf format=pix_fmts=gray16le,geq='^ st(0,PI/360*%OUT_H_FOV%*((2*X+1)/%OUT_W%-1));^ st(1,PI/360*%OUT_V_FOV%*((2*Y+1)/%OUT_H%-1));^ st(4,cos(ld(1))*sin(ld(0)));^ st(5,sin(ld(1)));^ st(6,cos(ld(1))*cos(ld(0)));^ st(7,atan2(ld(5),ld(4)));^ st(8,acos(ld(6)));^ st(9,if(lte(ld(8),%RS%/180*PI),%OUT_W%,0));^ st(8,if(gt(ld(8),%RS%/180*PI),ld(8)-(2*%RS%/180*PI/(ld(8)-%RS%/180*PI)),0));^ st(4,sin(ld(8))*cos(ld(7)));^ st(5,sin(ld(8))*sin(ld(7)));^ st(6,cos(ld(8)));^ st(7,atan2(ld(4),ld(6)));^ st(8,asin(ld(5)));^ ld(9)+0.5*%IN_W%*(1+ld(7)/%IN_H_FOV%*360/PI)' -frames 1 -y xmap.pgm ___ 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] Multiple parts of a video
Am 31.05.2022 um 20:27 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. But if you put them before the input file they are not precise, but work on the iframe level. This can give quit extensive differences. (I was bitten by that in the past.) Or is that not the case in this specific scenario? Then you could use the trim 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] Multiple parts of a video
Am 31.05.2022 um 20:27 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. But if you put them before the input file they are not precise, but work on the iframe level. This can give quit extensive differences. (I was bitten by that in the past.) Or is that not the case in this specific scenario? Then you could use the trim 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] Multiple parts of a video
Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. 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] Multiple parts of a video
Am 31.05.2022 um 11:17 schrieb Bo Berglund: On Sun, 29 May 2022 13:17:55 +0200, Michael Koch wrote: Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? Please have a look at https://trac.ffmpeg.org/wiki/Concatenate "Concat demuxer", "Concat protocol" and "Concat filter" are three different things. You did use the concat demuxer. Now if you want to do all in one line, you must use the concat filter. Michael Stepping in here due to the interesting topic: I am daily using a tool I created myself to use ffmpeg to remove ads from recorded mp4 TV news videos. What I do is the following: - I manually scan the video to find the start/end times of the ads (seconds) - From this list the tool creates the ffmpeg commands to extract the parts *between* the ads as separate numbered mp4 files - Then a list of these small files is written to a file $JOINFILE - This is then used in an ffmpeg call like this: ffmpeg -f concat -safe 0 -i $JOINFILE -c copy $TARGETFILE - When this is done the small files and $JOINFILE are deleted So reading this thread I get the feeling that there is a way to use the list of cut times in a *single ffmpeg command* to create the output mp4 file *without* creating the list file and essentially doing everything in this single ffmpeg command. I have a short example in chapter 2.57 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] Multiple parts of a video
Am 28.05.2022 um 21:17 schrieb Cecil Westerhof via ffmpeg-user: Paul B Mahol writes: On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user wrote: When I just want to have a certain part of a video, I can do something like: ffmpeg -y -i input.MTS \ -ss 00:08 \ -to 00:17 \ -acodec copy\ -vcodec libx264 \ -preset veryfast\ output.mp4 But what if I want several parts of a video in my video? Do I need to cut the different parts out of the video and concatenate them, or is it possible to do it with one command? Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? Please have a look at https://trac.ffmpeg.org/wiki/Concatenate "Concat demuxer", "Concat protocol" and "Concat filter" are three different things. You did use the concat demuxer. Now if you want to do all in one line, you must use the concat 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] FFplay, wrong output size on extended desktop
Am 25.05.2022 um 21:32 schrieb Gyan Doshi: On 2022-05-25 08:31 pm, Michael Koch wrote: Hello, we want to use FFplay in a planetarium. It's a Windows computer with an extended desktop. The left monitor contains the user interface (1920x1080) and at the right side is a 4Kx4K extended desktop, which is shown on two 4096x2048 monitors, upper half and lower half. The extended 4Kx4K desktop is mirrored to the dome with 11 projectors. We are using this 4Kx4K test image: http://www.paulbourke.net/dome/testpattern/4096.png This is the FFplay command line: ffplay -noborder -left 1920 -top 0 4096.png The problem is that the image is shown twice as large as it should be, so that we see only the top left quadrant. You can see a screenshot in this discord channel (in german language): https://discord.com/channels/968113228230045706/968113812769210398 If we set the size to 2048x2048, then the output is 4096x4096: ffplay -noborder -x 2048 -y 2048 -left 1920 -top 0 4096.png But then we don't have the full 4K resolution. Who has an idea what's wrong here? The console output is below. What's the size value in Settings -> Display under Scale and Layout? Problem solved. Scale was set to 200%. Thanks, 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] FFplay, wrong output size on extended desktop
Am 25.05.2022 um 21:32 schrieb Gyan Doshi: On 2022-05-25 08:31 pm, Michael Koch wrote: Hello, we want to use FFplay in a planetarium. It's a Windows computer with an extended desktop. The left monitor contains the user interface (1920x1080) and at the right side is a 4Kx4K extended desktop, which is shown on two 4096x2048 monitors, upper half and lower half. The extended 4Kx4K desktop is mirrored to the dome with 11 projectors. We are using this 4Kx4K test image: http://www.paulbourke.net/dome/testpattern/4096.png This is the FFplay command line: ffplay -noborder -left 1920 -top 0 4096.png The problem is that the image is shown twice as large as it should be, so that we see only the top left quadrant. You can see a screenshot in this discord channel (in german language): https://discord.com/channels/968113228230045706/968113812769210398 If we set the size to 2048x2048, then the output is 4096x4096: ffplay -noborder -x 2048 -y 2048 -left 1920 -top 0 4096.png But then we don't have the full 4K resolution. Who has an idea what's wrong here? The console output is below. What's the size value in Settings -> Display under Scale and Layout? I have forwarded your question to the discord channel. I can't answer it myself because I'm 300 km away from the planetarium. Please feel free to comment in the discord channel in english, if you like. 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".
