[Ffmpeg-devel] Audio bitrate

[Michel Bardiaux]

Seems wrong in some cases:

ffmpeg -i utc_1434.mpg -vn -acodec adpcm_ms -y -ar 8000 msadpcm.wav
FFmpeg version SVN-r6917, Copyright (c) 2000-2006 Fabrice Bellard, et al.
   configuration:
   libavutil version: 49.0.2
   libavcodec version: 51.24.0
   libavformat version: 51.6.0
   built on Nov  6 2006 16:13:12, gcc: 3.3.5 (Debian 1:3.3.5-13)
Input #0, mpeg, from 'utc_1434.mpg':
   Duration: 00:00:57.0, start: 92564.370489, bitrate: 668 kb/s
   Stream #0.0[0x1e0]: Video: mpeg1video, yuv420p, 352x288, 104857 kb/s, 
25.00 fps(r)
   Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, mono, 32 kb/s
Output #0, wav, to 'msadpcm.wav':
   Stream #0.0: Audio: adpcm_ms, 8000 Hz, mono, 64 kb/s
Stream mapping:
   Stream #0.1 -> #0.0
Press [q] to stop encoding
size=     235kB time=59.8 bitrate=  32.2kbits/s
video:0kB audio:235kB global headers:0kB muxing overhead 0.018285%

Should be 32kbits in the 0.0 line.

With pcm_s16le, the bitrate is correct. But I dont see at once where it 
is set. "Use the source, Luke", all right, but if somebody just *knows*...

-- 
Michel Bardiaux
R&D Director
T +32 [0] 2 790 29 41
F +32 [0] 2 790 29 02
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