[FFmpeg-trac] #3597(undetermined:new): ffmpeg git version N-62751-gd03defa create slow/hang h.264 file.
FFmpeg
trac at avcodec.org
Mon Apr 28 16:19:00 CEST 2014
#3597: ffmpeg git version N-62751-gd03defa create slow/hang h.264 file.
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Reporter: dkt | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: git-master | undetermined
Keywords: h264 | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by kierank):
Replying to [comment:12 dkt]:
> Replying to [comment:11 cehoyos]:
> > Replying to [comment:10 dkt]:
>
> > I can reproduce the difference between the output files - decoding
takes five times as long for the FFmpeg sample - but when this will be
analyzed the "bug" will most likely either be a different (older) x264
version in ffmbc (or is this dynamic linking so both ffmpeg and ffmbc use
the same x264 library?) or a missing option for ffmpeg that is default for
ffmbc: I don't disagree though that we could copy this behaviour.
> > Could you test {{{-tune fastdecode}}} with ffmpeg in the meantime?
> >
> > I can play the ffmpeg output file here in realtime with:
> > $ mplayer -lavdopts threads=8 -vo gl_nosw ffmpeg-output.mov
>
> Ok, the fastdecode option produce much better result.
This is almost certainly not AVC-Intra compliant. I'm not sure if FFmpeg
supports passing through that option and -vb 100M does not help because
AVC-Intra 100 is not 100mbps exactly.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3597#comment:14>
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