id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1796	Unable to extract PCM audio track from AVI file	tom_bogle		"Summary of the bug: I have an AVI-wrapped dvvideo file with a single pcm_s16le audio track. The video plays fine (although there is a funny noise at the start that might indicate some kind of corruption or encoding problem). I am able to extract the audio using MPlayer, and ffmpeg can successfully produce a lower-quality avi file and extract the audio as mp3. I am able to run ffmpeg a second time to get a WAV file from either of these. However, if I simply try to extract the audio track directly into a WAV file from the original AVI file, all I get is 0.03 seconds of noise. There is no error message, so the software I'm writing that is running ffmpeg and monitoring the output can't tell anything went wrong.

How to reproduce:
{{{
% ffmpeg -i TruncatedPCMAudio.avi -vn -acodec copy temp.wav
  - OR -
% ffmpeg -i TruncatedPCMAudio.avi -vn -acodec pcm_s16le temp.wav
ffmpeg version N-40126-ga4b58fd
built on Apr 26 2012 03:29:50 with gcc 4.6.3
}}}

ffmpeg -v 9 -loglevel 99 -i TruncatedPCMAudio.avi
ffmpeg version N-40126-ga4b58fd Copyright (c) 2000-2012 the FFmpeg developers
  built on Apr 26 2012 03:29:50 with gcc 4.6.3
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
 --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --e
nable-zlib
  libavutil      51. 47.100 / 51. 47.100
  libavcodec     54. 15.100 / 54. 15.100
  libavformat    54.  3.100 / 54.  3.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 72.100 /  2. 72.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
[avi @ 01d3c020] Format avi probed with size=2048 and score=100
[AVI demuxer @ 01d3c680] use odml:1
[avi @ 01d3c020] File position before avformat_find_stream_info() is 32768
[avi @ 01d3c020] All info found
[avi @ 01d3c020] File position after avformat_find_stream_info() is 185032
Input #0, avi, from 'TruncatedPCMAudio.avi':
  Duration: 00:03:52.46, start: 0.000000, bitrate: 28855 kb/s
    Stream #0:0, 1, 1001/30000: Video: dvvideo, yuv411p, 720x480, 1001/30000, 28
771 kb/s, SAR 8:9 DAR 4:3, 29.97 tbr, 29.97 tbn, 29.97 tbc
    Stream #0:1, 1, 1/30000: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 k
b/s
At least one output file must be specified"	defect	open	normal	undetermined	git-master		avi				1	0