Difference between revisions of "Libavcodec regressions"
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Latest revision as of 06:40, 19 March 2019
Contents
To be investigated issues
RMVB deadlocking
With threads >= 1 and libav
See https://trac.videolan.org/vlc/ticket/10493
Open issues
Closed issues
MTS regression (worked-around)
Possibly VLC TS demuxer does not output correct IDR information.
Whether the demuxer is wrong or not, it fails with libav, but it works with FFmpeg.
See https://trac.videolan.org/vlc/ticket/10140 and http://streams.videolan.org/issues/10140/MTS%20AVCHD%20Lite%20files%20no%20picture%20bug%20since%20v.2.1.1.MTS
VC1i
Some VC1i sample did not work in libav: http://streams.videolan.org/issues/5887/Journey%20to%20the%20Edge%20of%20the%20Universe%20sample.mkv
FFv1 v1.3 support
See https://trac.videolan.org/vlc/ticket/9606
The sample here related https://trac.videolan.org/vlc/ticket/8691#no4 is now fixed jb (talk) 16:30, 28 December 2013 (CET)
Lagarith YV12 direct-rendering
YV12 broken in libav when using direct-rendering. Numerous reports about that. https://forum.videolan.org/viewtopic.php?f=14&t=115983&hilit=lagarith
See https://trac.videolan.org/vlc/ticket/7375 and https://trac.videolan.org/vlc/ticket/9700
Samples here: http://streams.videolan.org/issues/7375/YV12.avi and http://streams.videolan.org/issues/7375/mechanical.cut.avi
Xvid Matrix
XVid "Bulletproof's Heavy Compression Matrix" fails in libav, works in FFmpeg.
See https://trac.videolan.org/vlc/ticket/7411 and sample here https://trac.videolan.org/vlc/raw-attachment/ticket/7411/sample.avi
Solution here: https://git.libav.org/?p=libav.git;a=commit;h=7716dd9fbbcea2700a100c995df967d5547c2eb9
non-SSE2 playback
VLC fails to play on non-SSE2 machines in libav
See the bugreport here https://trac.videolan.org/vlc/ticket/10203 and see the numerous complaints on the forum here https://forum.videolan.org/viewtopic.php?f=2&t=115952&p=393815&hilit=athlon#p393815
Solution here: https://git.libav.org/?p=libav.git;a=commit;h=51daafb02eaf96e0743a37ce95a7f5d02c1fa3c2
HUffYUV
With FFmpeg, HuffYUv is broken. See https://trac.ffmpeg.org/ticket/3395
MXF playback broken - part 1
No video on this 1080p50 sample in libav: http://streams.videolan.org/misc/mxf/1080p50.MXF
MXF playback broken - part 2
No seek after 4GB on this sample in libav http://streams.videolan.org/misc/mxf.zip
