[Libav-user] ffmpeg @ 2.0.X has a bogus FFV1 codec?

[André Anjos]

Thanks for this reply. Could you please share a fix for the program that
makes it work?

André


On Tue, Oct 22, 2013 at 10:29 AM, Paul B Mahol <onemda at gmail.com> wrote:

> On 10/22/13, Andre Anjos <andre.dos.anjos at gmail.com> wrote:
> > Hello,
> >
> > I'm using a MacPorts build of ffmpeg 2.0.2. It passes most of our tests,
> > except the one using the FFV1 codec. This seems independent of the file
> > format chosen.
> >
> > How to reproduce the problem:
> >
> > 1) Download the muxing example from the ffmpeg doxygen documentation (
> > http://ffmpeg.org/doxygen/2.0/doc_2examples_2muxing_8c-example.html)
> >
> > 2) By the end of the application, replace the code:
> >
> > if (fmt->video_codec != AV_CODEC_ID_NONE) {
> > video_st = add_stream(oc, &video_codec, fmt->video_codec);
> > }
> >
> > With:
> >
> > video_st = add_stream(oc, &video_codec, AV_CODEC_ID_FFV1)
> >
> > So, that the FFV1 codec is forced.
> >
> > 3) Compile the program (on OSX, that would be):
> >
> > clang -I/opt/local/include test.c -L/opt/local/lib -lavutil
> > -lavcodec -lavformat -lswscale -lswresample -o ffmpeg_test
> >
> > 4) Run the program:
> >
> > ./ffmpeg_test foo.avi
> >
> > to get:
> >
> > [libmp3lame @ 0x7fa7d201f200] Channel layout not specified
> >  Output #0, avi, to 'test.avi':
> >      Stream #0:0: Video: ffv1, yuv420p, 352x288, q=2-31, 400 kb/s, 90k
> tbn,
> >  25 tbc
> >      Stream #0:1: Audio: mp3 (libmp3lame), 44100 Hz, 2 channels, fltp, 64
> >  kb/s
> >  Error encoding video frame: Invalid argument
> >
> > Result: Bogus file, with error
> >
> > Expected result: clean file with no errors.
> >
> > Can anyone confirm this or provide some light on what I could possibly be
> > doing wrong? A developer from MacPorts has confirmed the problem - it
> does
> > not happen on 1.2.x. It does happen with 2.0.1 and 2.0.2 (
> > https://trac.macports.org/ticket/40829).
> >
> > Thanks in advance, A
>
> FFmpeg 2.0.X does not have bogus FFV1 codec.
>
> The examples code is of very low quality.
>
> FFV1 encoder have been changed in its initialization to abort when
> width/height is not set.
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>



-- 
André Anjos
http://andreanjos.org
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