[Ffmpeg-devel] [PATCH] Fix asf header decoding issue

[Patrice Bensoussan]

Hello Diego,

Here is another patch which fixes an issue in the decoding of the asf  
header. Basically, the duration of the playback and the time stamp of  
the end position doesn't seem to be read in the right order. This  
causes the duration and bitrate to have negative values on some  
files. (see below the output of ffmpeg before/after the fix on a file  
showing the issue).

Regards,
Patrice

- Before fix :

patrice-bensoussans-ibook-g4:~/Desktop patriceb$ ./ffmpeg -i bug.wma  
bug.mp3
ffmpeg version CVS, build 3211266, Copyright (c) 2000-2004 Fabrice  
Bellard
   configuration:  --enable-mp3lame --enable-faac --enable-small
   built on Aug 24 2005 20:02:45, gcc: 3.3 20030304 (Apple Computer,  
Inc. build 1809)
Input #0, asf, from 'bug.wma':
   Duration: 00:00:-1.-5, start: 1.579000, bitrate: -42837 kb/s
   Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 80 kb/s
Output #0, mp3, to 'bug.mp3':
   Stream #0.0: Audio: mp3, 44100 Hz, stereo, 64 kb/s
Stream mapping:
   Stream #0.0 -> #0.0
Press [q] to stop encoding
size=    6206kB time=794.4 bitrate=  64.0kbits/s
video:0kB audio:6206kB global headers:0kB muxing overhead 0.000000%

- After fix :

patrice-bensoussans-ibook-g4:~/Desktop patriceb$ ./ffmpeg -i bug.wma  
bug.mp3
ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice  
Bellard
   configuration:  --enable-small --enable-mp3lame --enable-faac -- 
extra-ldflags=-L/Users/patriceb/tmp/WMA/opt/lib --extra-cflags=-I/ 
Users/patriceb/tmp/WMA/opt/include
   built on Oct 19 2005 23:05:37, gcc: 3.3 20030304 (Apple Computer,  
Inc. build 1809)
Input #0, asf, from 'bug.wma':
   Duration: 00:13:14.2, start: 1.579000, bitrate: 80 kb/s
   Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 80 kb/s
Output #0, mp3, to 'bug.mp3':
   Stream #0.0: Audio: mp3, 44100 Hz, stereo, 64 kb/s
Stream mapping:
   Stream #0.0 -> #0.0
Press [q] to stop encoding
size=    6206kB time=794.4 bitrate=  64.0kbits/s
video:0kB audio:6206kB global headers:0kB muxing overhead 0.000000%

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