[Ffmpeg-devel] FFV1 codec crashes on files written with 0.4.9pre1

Andreas Matthies a.matthies
Wed Feb 8 20:58:29 CET 2006


My application uses 0.4.9pre1 libs to write avi files with FFV1 video
stream. These files play fine with older FFDSHOW filter but latest ffmpeg
(and newer FFDSHOW filter and VLC) crashes on these files. I tracked it down
to read_quant_table failing. Here's the output with additional logging the
len and i in the for(v=0; i<128 ; v++) loop:

C:\devel\ffmpeg\ffmpeg>ffmpeg -i ../ffv1test.avi
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-mp3lame --enable-memalign-hack
  libavutil version: 49.0.0
  libavcodec version: 51.2.0
  libavformat version: 50.1.0
  built on Feb  8 2006 20:14:50, gcc: 3.2.3 (mingw special 20030504-1)
len=3  i=0
len=1  i=3
len=9  i=4
len=1  i=13
len=1  i=14
len=2  i=15
len=1  i=17
len=5  i=18
len=3  i=23
len=1  i=26
len=3  i=27
len=2  i=30
len=1  i=32
len=1  i=33
len=3  i=34
len=1  i=37
len=2  i=38
len=2  i=40
len=4  i=42
len=2  i=46
len=1  i=48
len=2  i=49
len=21  i=51
len=2  i=72
len=2  i=74
len=2  i=76
len=2  i=78
len=1  i=80
len=2  i=81
len=3  i=83
len=9  i=86
len=1  i=95
len=1  i=96
len=1  i=97
len=1  i=98
len=1  i=99
len=1  i=100
len=1  i=101
len=2  i=102
len=3  i=104
len=1  i=107
len=1  i=108
len=49  i=109
[ffv1 @ 007651C0]read_quant_table error

Is this a known problem with older FFV1 files?
I failed to upload my sample file to ftp.mplayerhq.hu (missing rights to
create directory/files) but I can send you via email (~700kB).

- Andreas

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