[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 15:59:42 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 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.
BTW, users expect the playback of the converted files by ffplay and in
other NLE is smooth.
When I used ffmpeg to produce 4k yuv444 AVC-intra files (using default
settings) in 2014 Jan, I can't playback those file smoothly by a
reasonably fast machine (Quad core eight threads desktop).
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3597#comment:12>
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