Public bug reported:

Trying to use ffmpeg to converting flash videos from youtube to .mp3
via "ffmpeg -i /tmp/Flash**** output-file.mp3" results in

taavi...@hp-dv5:/tmp$ ffmpeg -i Flashu9P2Dr orgazmo.mp3
FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 
Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-postproc --enable-swscale 
--enable-x11grab --extra-version=svn17737+3:0.svn20090303-1ubuntu6 
--prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-libgsm 
--enable-libschroedinger --enable-libspeex --enable-libtheora 
--enable-libvorbis --enable-pthreads --disable-stripping --disable-vhook 
--enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Apr 10 2009 23:20:33, gcc: 4.3.3

Seems stream 0 codec frame rate differs from container frame rate: 2000.00 
(2000/1) -> 29.92 (359/12)
Input #0, flv, from 'Flashu9P2Dr':
  Duration: 00:02:09.36, start: 0.000000, bitrate: 264 kb/s
    Stream #0.0: Video: h264, yuv420p, 320x240 [PAR 1:1 DAR 4:3], 264 kb/s, 
29.92 tbr, 1k tbn, 2k tbc
    Stream #0.1: Audio: aac, 22050 Hz, stereo, s16
File 'orgazmo.mp3' already exists. Overwrite ? [y/N] y
Output #0, mp3, to 'orgazmo.mp3':
    Stream #0.0: Audio: 0x0000, 22050 Hz, stereo, s16, 64 kb/s
Stream mapping:
  Stream #0.1 -> #0.0
Unsupported codec for output stream #0.0

However, when replacing libavcodec52 with the unstripped-version, this
works.

taavi...@hp-dv5:/tmp$ ffmpeg -i Flashu9P2Dr orgazmo.mp3
FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 
Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-postproc --enable-swscale 
--enable-x11grab --extra-version=svn17737+3:0.svn20090303-1ubuntu6 
--prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-libgsm 
--enable-libschroedinger --enable-libspeex --enable-libtheora 
--enable-libvorbis --enable-pthreads --disable-stripping --disable-vhook 
--enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Apr 10 2009 23:20:33, gcc: 4.3.3

Seems stream 0 codec frame rate differs from container frame rate: 2000.00 
(2000/1) -> 29.92 (359/12)
Input #0, flv, from 'Flashu9P2Dr':
  Duration: 00:02:09.36, start: 0.000000, bitrate: 264 kb/s
    Stream #0.0: Video: h264, yuv420p, 320x240 [PAR 1:1 DAR 4:3], 264 kb/s, 
29.92 tbr, 1k tbn, 2k tbc
    Stream #0.1: Audio: aac, 22050 Hz, stereo, s16
File 'orgazmo.mp3' already exists. Overwrite ? [y/N] y
Output #0, mp3, to 'orgazmo.mp3':
    Stream #0.0: Audio: libmp3lame, 22050 Hz, stereo, s16, 64 kb/s
Stream mapping:
  Stream #0.1 -> #0.0
Press [q] to stop encoding
size=    1014kB time=129.83 bitrate=  64.0kbits/s    
video:0kB audio:1014kB global headers:0kB muxing overhead 0.003081%

ProblemType: Bug
Architecture: amd64
Date: Sun Jun  7 10:14:04 2009
DistroRelease: Ubuntu 9.10
Package: ffmpeg 3:0.svn20090303-1ubuntu6
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.30-8.9-generic
SourcePackage: ffmpeg-debian
Uname: Linux 2.6.30-8-generic x86_64

** Affects: ffmpeg-debian (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
Unsupported codec for output stream #0.0
https://bugs.launchpad.net/bugs/384451
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