Re: [FFmpeg-user] VAAPI decoding/encoding of several video streams in parallel
On Tue, Dec 20, 2016 at 22:21:12 +0400, Anton Sviridenko wrote: > http://ffmpeg.org/pipermail/ffmpeg-user/2016-December/034530.html [...] > 3) Can I use single hwdevice and vaapi_context instances for all > streams or there should be own instance for each decoded/encoded > stream? You'll have more luck getting help on the appropriate mailing list libav-user: https://lists.ffmpeg.org/mailman/listinfo/libav-user/ which is dedicated to the use of the libav* libraries, while this list concentrates on the command line tools. That mentioned thread was already off-topic, and quite lucky it got a good answer, if you ask me. ;-) Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Why is length and bitrate zero?
On Tue, Dec 20, 2016 at 13:31:25 +1300, Michael Heuberger wrote: > But regarding the length, that still doesn't look right. Can you check > the lengths again with your random ones? The lengths all look correct in smplayer (I didn't check their actual lengths), but so does the output from your example. Gruß, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] VAAPI decoding/encoding of several video streams in parallel
On 20/12/16 18:21, Anton Sviridenko wrote: > I want to use hardware acceleration for processing multiple realtime > videostreams (coming over RTSP). > I've read this thread - > http://ffmpeg.org/pipermail/ffmpeg-user/2016-December/034530.html > > and have some questions related to scaling this everything to several > video streams: > > 1) Is it possible at all to use VAAPI acceleration for several > independent video streams simultaneously? Yes, the kernel drivers deal with all of the detail here - it's exactly the same as using your GPU to run multiple OpenGL programs at the same time. > 2) How should I initialize VAAPI related stuff? Do I have to create > separate hwframe context for each stream? Not necessarily, it depends on what you want to do. Some things to consider: * A hwframe pool needs to be fixed-size to use as output from a decoder or filter (note the render_targets argument to vaCreateContext(), which you supply the surfaces member of AVVAAPIFramesContext to), so can be exhausted. Decoders and encoders may both hold on to frames for some length of time (to use as reference frames, to wait for the stream delay), so a pool used by multiple of them needs to be large enough to not run out even when they sit on some of the surfaces for a while. * All surfaces in a single hwframe context are the same size and format. While it's perfectly valid to decode a frame onto a surface which is larger than the frame, it does waste memory so you may want to make the surfaces of the correct size when that is known. * A filter or encoder should only be given input which matches the hwframe context you declared as its input when you created it. This is primarily an API restriction and some other cases do work some of the time, but keeping to it will avoid any surprises. The easiest way to do it is probably to follow what ffmpeg itself does: make a single hwframe context for the output of each decoder or other operation, and then give that to whatever the next thing is which will consume those frames. This won't necessarily be sufficient in all cases - if you have something more complex with output from multiple decoders being combined somehow then you'll need to think about it more carefully keeping the restrictions above in mind. > 3) Can I use single hwdevice and vaapi_context instances for all > streams or there should be own instance for each decoded/encoded > stream? Typically you will want to make one device and then use it everywhere. Multiple devices should also work, but note that different devices can't interoperate at all (so a decoder, scaler and encoder working with the same surfaces and hwframe context need to be using the same device, say). You need to make exactly one struct vaapi_context for each decoder (with configuration appropriate to that decoder). - Mark ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Generate/Playback Interlaced (1080i) video with lavfi.
Hi, I’m trying to generate some smtpebars with a script, and it works fine for 1080p video. However, I’ve tried numerous combinations for generating 1080i video using the –vf tinterlace filter. For example, if I want to generate 1080i50 video, do I use 25000/1000 as the framerate, and then –vf tinterlace=6? This doesn’t seem to work. I’ve also tried setting the framerate to 5/1000 and then using –vf tinterlace=4, but that seems to be giving 1080p25 instead of true 1080i50? I’m probably way off here, any help would be really appreciated. Example command (not at all inclusive of everything I’ve tried): ffmpeg –y –f lavfi –i “smptebars=duration=1:size=1920x1080:rate=25000/1000” –pix_fmt uyvy422 –vcodec rawvideo –vf tinterlace=6 smpte_bar_test.mov More importantly, using the decklink output device, is there a way to playback an interlaced video? Even if I try to playback a video that I know is 1080i, it always plays out as progressive from the decklink output device. Thanks! ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] VP9 to HEVC hdr demo conversion?
Carl Eugen Hoyos-2 wrote > So what is missing from the FFmpeg mkv muxer? I can't answer to your question. I just wanted to share my experience: using the command mentioned in my first mail in this thread I was not able to correctly encode the HDR video in object, while using the command mentioned in my last mail (as suggested by Andy Furniss) the encoding was ok. -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/VP9-to-HEVC-hdr-demo-conversion-tp4678255p4678650.html Sent from the FFmpeg-users mailing list archive at Nabble.com. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] cutoff argument not passed to libmp3lame
Am 19.12.2016 um 01:56 schrieb Carl Eugen Hoyos: 2016-12-18 23:58 GMT+01:00 Bernhard Döbler : I looked into ffmpeg documentation and saw there's an argument "-cutoff" that should do, what "-lowpass" does in LAME. Why do you think so / where does it say so in the documentation? LAME documentation says: --lowpass Frequency(kHz), lowpass filter cutoff above freq. http://lame.cvs.sourceforge.net/viewvc/lame/lame/USAGE FFMpeg Doc says cutoff Set cutoff bandwidth in Hz. https://ffmpeg.org/ffmpeg-codecs.html Slightly different in every codec in ffmpeg but seems to be identical in principle. Bernhard ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Fwd: [Libav-user] MP4 concatenation with MP42 major_brand
-- Forwarded message -- From: Nicolas George Date: Tue, Dec 20, 2016 at 2:12 PM Subject: Re: [Libav-user] MP4 concatenation with MP42 major_brand To: libav-u...@ffmpeg.org, ffmpeg-user@ffmpeg.org Le decadi 30 frimaire, an CCXXV, black copper a écrit : > I have MP4 source videos, that contain: > > video: H264 > audio: G.711 (mulaw) > > I want to use concatenation on source videos to get one MP4 file. > > I used concat filter by first creating a list: mylist.txt file as follows: > > file 'v1.mp4' > file 'v2.mp4' > file 'v3.mp4' > > then envoked ffmpeg command like this: > > ffmpeg -f concat -i mylist.txt -c copy op.mp4 -y > > This worked only with files that are mp41 compatible. > > With mp42 files that I mentioned above, I get this error: > > [mp4 @ 0x24ca780] Could not find tag for codec pcm_mulaw in stream #1, > codec not currently supported in container > Could not write header for output file #0 (incorrect codec parameters ?): > Invalid argument This message is about output, not input. Please test remuxing a single file, without concat, using the first file in each sequence: ffmpeg -i input.mp4 -c copy output.mp4 >> yes, its giving the same error... If, as I suspect, it fails the same way, your problem is exactly what is written in the second line of the error message. Also, note that you posted on the wrong mailing-list. Adding ffmpeg-user as recipient, please reply only there. >> doing that, thanks, Regards, -- Nicolas George > Full command line: > > > ffmpeg -f concat -i mylist.txt -c copy op.mp4 -y > ffmpeg version N-82760-g55affd9 Copyright (c) 2000-2016 the FFmpeg > developers > built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3) > configuration: --pkg-config-flags=--static > --extra-cflags=-I/home/ubuntu/ffmpeg_build/include > --extra-ldflags=-L/home/ubuntu/ffmpeg_build/lib --enable-gpl > --enable-libass --enable-libfdk-aac --enable-libfreetype > --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis > --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree > libavutil 55. 41.101 / 55. 41.101 > libavcodec 57. 66.109 / 57. 66.109 > libavformat57. 58.101 / 57. 58.101 > libavdevice57. 2.100 / 57. 2.100 > libavfilter 6. 68.100 / 6. 68.100 > libswscale 4. 3.101 / 4. 3.101 > libswresample 2. 4.100 / 2. 4.100 > libpostproc54. 2.100 / 54. 2.100 > [mov,mp4,m4a,3gp,3g2,mj2 @ 0x23ed7c0] Auto-inserting h264_mp4toannexb > bitstream filter > Guessed Channel Layout for Input Stream #0.0 : mono > Input #0, concat, from 'mylist.txt': > Duration: N/A, start: 0.00, bitrate: 518 kb/s > Stream #0:0(eng): Audio: pcm_mulaw (ulaw / 0x77616C75), 8000 Hz, mono, > s16, 64 kb/s > Metadata: > creation_time : 2016-12-20T03:41:14.00Z > handler_name: ?Apple Sound Media Handler > Stream #0:1(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 1920x1080, 454 kb/s, 27.70 fps, 27.70 tbr, 90k tbn, 180k tbc > Metadata: > creation_time : 2016-12-20T03:41:14.00Z > handler_name: ?Apple Video Media Handler > encoder : H.264 > [mp4 @ 0x2413780] Could not find tag for codec pcm_mulaw in stream #1, > codec not currently supported in container > Could not write header for output file #0 (incorrect codec parameters ?): > Invalid argument > Stream mapping: > Stream #0:1 -> #0:0 (copy) > Stream #0:0 -> #0:1 (copy) > Last message repeated 1 times > > > I'm on Ubuntu 14.04 OS. > > Is there anyway I can get this functionality to work with mp42 compatible > files? any help is much appreciated, > > Thanks, > ___ > Libav-user mailing list > libav-u...@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/libav-user ___ Libav-user mailing list libav-u...@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user signature.asc Description: PGP signature ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] VAAPI decoding/encoding of several video streams in parallel
I want to use hardware acceleration for processing multiple realtime videostreams (coming over RTSP). I've read this thread - http://ffmpeg.org/pipermail/ffmpeg-user/2016-December/034530.html and have some questions related to scaling this everything to several video streams: 1) Is it possible at all to use VAAPI acceleration for several independent video streams simultaneously? 2) How should I initialize VAAPI related stuff? Do I have to create separate hwframe context for each stream? 3) Can I use single hwdevice and vaapi_context instances for all streams or there should be own instance for each decoded/encoded stream? Anton ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] aevalsrc question
On 12/20/16, Adam Puckett wrote: > On 12/20/16, Muhammad Faiz wrote: >> On 12/20/16, Adam Puckett wrote: >>> On 12/19/16, Nicolas George wrote: Oh, good catch. I should have remembered this task needed a primitive function, not just a multiplication. Regards, -- Nicolas George >>> What do I need to do to make the formula right? >> >> Just do the reverse. >> Given freq(t) = 262 * 2^(t/10) >> w(t) = 2*PI * 262 * 2^(t/10) >> ph(t) = integral of w(t) dt >> = 2*PI * 262 * 10/log(2) * 2^(t/10) + arbitrary constant >> >> Thx. >> ___ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > Thanks, that worked! But the question is: why? I don't quite > understand why I had to put in the log(2) expression. > > On a related note, I've looked at a formula that does linear > interpolation (one of the example scripts for Praat > (http://praat.org/)), and there is a division by 2 in the script; is > this for a similar reason? (For arbitrary targeted frequencies, I'm > assuming I would have to use a log(highestfreq/lowestfreq) in place of > the log(2)?) > > Thanks It is calculus 2^(t/10) = exp(t/10 * log(2)) and integral exp(a * t) * dt = 1/a * exp(a * t) + arbitrary constant thx ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] aevalsrc question
On 12/20/16, Muhammad Faiz wrote: > On 12/20/16, Adam Puckett wrote: >> On 12/19/16, Nicolas George wrote: >>> Oh, good catch. I should have remembered this task needed a primitive >>> function, not just a multiplication. >>> >>> Regards, >>> >>> -- >>> Nicolas George >>> >> What do I need to do to make the formula right? > > Just do the reverse. > Given freq(t) = 262 * 2^(t/10) > w(t) = 2*PI * 262 * 2^(t/10) > ph(t) = integral of w(t) dt > = 2*PI * 262 * 10/log(2) * 2^(t/10) + arbitrary constant > > Thx. > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". Thanks, that worked! But the question is: why? I don't quite understand why I had to put in the log(2) expression. On a related note, I've looked at a formula that does linear interpolation (one of the example scripts for Praat (http://praat.org/)), and there is a division by 2 in the script; is this for a similar reason? (For arbitrary targeted frequencies, I'm assuming I would have to use a log(highestfreq/lowestfreq) in place of the log(2)?) Thanks ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] High memory usage when merging videos
On 12/20/16, Muhammad Faiz wrote: > On 12/20/16, Jonathan Girven wrote: >>> How if you move your multiple inputs into movie sources inside >>> filter_complex? >> >> Sorry, I looked at the documentation here: >> >> https://ffmpeg.org/ffmpeg-filters.html#Video-Sources >> >> but couldn't see how to grab a file with this. Do you have an example? > > At this section: https://ffmpeg.org/ffmpeg-filters.html#Multimedia-Sources > > for example, from your filter_complex: > "movie=movie0.mp4:s=dv+da [movie0_v][movie0_a]; > [movie0_v] setpts=PTS-STARTPTS[v0_trim0]; > [movie0_a] asetpts=PTS-STARTPTS[a0_trim0]; ..." > > Thank's > For safer approach, you may want separate video/audio in different movie sources e.g: "movie=movie0.mp4, setpts=PTS-STARTPTS [v0_trim0]; amovie=movie0.mp4, asetpts=PTS-STARTPTS [v1_trim0]; ... " Thx ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] High memory usage when merging videos
On 12/20/16, Jonathan Girven wrote: >> How if you move your multiple inputs into movie sources inside >> filter_complex? > > Sorry, I looked at the documentation here: > > https://ffmpeg.org/ffmpeg-filters.html#Video-Sources > > but couldn't see how to grab a file with this. Do you have an example? At this section: https://ffmpeg.org/ffmpeg-filters.html#Multimedia-Sources for example, from your filter_complex: "movie=movie0.mp4:s=dv+da [movie0_v][movie0_a]; [movie0_v] setpts=PTS-STARTPTS[v0_trim0]; [movie0_a] asetpts=PTS-STARTPTS[a0_trim0]; ..." Thank's ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] High memory usage when merging videos
> How if you move your multiple inputs into movie sources inside filter_complex? Sorry, I looked at the documentation here: https://ffmpeg.org/ffmpeg-filters.html#Video-Sources but couldn't see how to grab a file with this. Do you have an example? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] High memory usage when merging videos
> The changes I am working on would fix the "bufferqueue overflow, > dropping" problems that occur with slightly unbalanced streams, for > example audio streams with tiny frames where you can get a hundred or so > frames in one go. Thanks for clarifying that Nicolas. > But it would not fix the really unbalanced cases, because nothing can. Are you thinking that the processing task I am trying to perform is simply too much for the device I am using? That might well be the answer. Naively I thought that, assuming the device could hold some number of dependent frames in memory, a less powerful device would only take more time to process a video, not trigger the OS to kill it. Obviously it is much more complicated than that, but still << 1GB RAM on a Moto G. FFmpeg using all the memory available to it isn't necessarily a bad thing. My problem is Android interpreting that as a reason to kill the task. I have tried many similar commands to narrow down what is happening. Just re-encoding a 2 minute video on the device doesn't get killed by the OS, e.g: ffmpeg -i input.mp4 -vcodec libx264 -preset faster output.mp4 Even though that is significantly more video and takes more time than the previously mentioned command. Similarly for trimming with "-ss" and "-t". Therefore my complex filter usage must be related to the OS killing the task. For both commands, FFmpeg quotes the speed at ~0.2x, so the processing time must be limited by the decoding or encoding rate. I am still working on trying to get something more specific than that, but it is difficult because running the same command twice does not consistently get killed or succeed. I suppose the first iteration might succeed but leave resources allocated (in my app or FFmpeg), so the second iteration is killed. For reference, the memory monitor of my app hovers around 40-60MB (but does not show FFmpeg's memory usage). Always open to new suggestions! Or perhaps hiring an FFmpeg developer is the way forward. Thanks, Jon. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] MP4 concatenation with MP42 major_brand
Le decadi 30 frimaire, an CCXXV, black copper a écrit : > I have MP4 source videos, that contain: > > video: H264 > audio: G.711 (mulaw) > > I want to use concatenation on source videos to get one MP4 file. > > I used concat filter by first creating a list: mylist.txt file as follows: > > file 'v1.mp4' > file 'v2.mp4' > file 'v3.mp4' > > then envoked ffmpeg command like this: > > ffmpeg -f concat -i mylist.txt -c copy op.mp4 -y > > This worked only with files that are mp41 compatible. > > With mp42 files that I mentioned above, I get this error: > > [mp4 @ 0x24ca780] Could not find tag for codec pcm_mulaw in stream #1, > codec not currently supported in container > Could not write header for output file #0 (incorrect codec parameters ?): > Invalid argument This message is about output, not input. Please test remuxing a single file, without concat, using the first file in each sequence: ffmpeg -i input.mp4 -c copy output.mp4 If, as I suspect, it fails the same way, your problem is exactly what is written in the second line of the error message. Also, note that you posted on the wrong mailing-list. Adding ffmpeg-user as recipient, please reply only there. Regards, -- Nicolas George > Full command line: > > > ffmpeg -f concat -i mylist.txt -c copy op.mp4 -y > ffmpeg version N-82760-g55affd9 Copyright (c) 2000-2016 the FFmpeg > developers > built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3) > configuration: --pkg-config-flags=--static > --extra-cflags=-I/home/ubuntu/ffmpeg_build/include > --extra-ldflags=-L/home/ubuntu/ffmpeg_build/lib --enable-gpl > --enable-libass --enable-libfdk-aac --enable-libfreetype > --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis > --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree > libavutil 55. 41.101 / 55. 41.101 > libavcodec 57. 66.109 / 57. 66.109 > libavformat57. 58.101 / 57. 58.101 > libavdevice57. 2.100 / 57. 2.100 > libavfilter 6. 68.100 / 6. 68.100 > libswscale 4. 3.101 / 4. 3.101 > libswresample 2. 4.100 / 2. 4.100 > libpostproc54. 2.100 / 54. 2.100 > [mov,mp4,m4a,3gp,3g2,mj2 @ 0x23ed7c0] Auto-inserting h264_mp4toannexb > bitstream filter > Guessed Channel Layout for Input Stream #0.0 : mono > Input #0, concat, from 'mylist.txt': > Duration: N/A, start: 0.00, bitrate: 518 kb/s > Stream #0:0(eng): Audio: pcm_mulaw (ulaw / 0x77616C75), 8000 Hz, mono, > s16, 64 kb/s > Metadata: > creation_time : 2016-12-20T03:41:14.00Z > handler_name: ?Apple Sound Media Handler > Stream #0:1(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 1920x1080, 454 kb/s, 27.70 fps, 27.70 tbr, 90k tbn, 180k tbc > Metadata: > creation_time : 2016-12-20T03:41:14.00Z > handler_name: ?Apple Video Media Handler > encoder : H.264 > [mp4 @ 0x2413780] Could not find tag for codec pcm_mulaw in stream #1, > codec not currently supported in container > Could not write header for output file #0 (incorrect codec parameters ?): > Invalid argument > Stream mapping: > Stream #0:1 -> #0:0 (copy) > Stream #0:0 -> #0:1 (copy) > Last message repeated 1 times > > > I'm on Ubuntu 14.04 OS. > > Is there anyway I can get this functionality to work with mp42 compatible > files? any help is much appreciated, > > Thanks, > ___ > Libav-user mailing list > libav-u...@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/libav-user signature.asc Description: Digital signature ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
