[FFmpeg-devel] Copying mp3 to FLV container Broken Since Haloween (SVN 10891)

[Scott Manley]

Ok so I've traced this down to a check in on Haloween, it used to be 
possible to copy mp3 audio into an flv wrapper without transcoding, but 
this appears to have broken with SVN 10891

So I have a clean mp3 file - no wierd bitrates, id3 tags or wierd vbr 
stuff in frames, just standard mp3 data, and I can pack it into a flash 
video container using this command line, there's a 'non monotone 
timestamp' warning, but that happens for any mp3 I throw at it, and the 
file still plays without a glitch in flash.

$ ffmpeg -i test.mp3 -acodec copy test.flv
FFmpeg version SVN-r10890, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
--mandir=/usr/share/man --incdir=/usr/include/ffmpeg 
--extra-cflags=-fPIC --enable-libmp3lame --enable-libfaad 
--enable-libx264 --enable-libxvid --enable-libfaac --enable-libgsm 
--enable-liba52 --enable-liba52bin --enable-libvorbis --enable-libtheora 
--enable-pp --enable-shared --enable-pthreads --enable-gpl 
--enable-libamr-wb --enable-libamr-nb --enable-qcelp --enable-swscaler 
--enable-libogg --disable-strip
  libavutil version: 49.5.0
  libavcodec version: 51.47.2
  libavformat version: 51.17.0
  built on Dec 11 2007 11:50:50, gcc: 4.1.1 20070105 (Red Hat 4.1.1-52)
Input #0, mp3, from 'test.mp3':
  Duration: 00:01:13.9, start: 0.000000, bitrate: 128 kb/s
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, 128 kb/s
File 'test.flv' already exists. Overwrite ? [y/N] y
Output #0, flv, to 'test.flv':
    Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
error, non monotone timestamps 13 >= 0
size=    1199kB time=73.9 bitrate= 132.9kbits/s
video:0kB audio:1156kB global headers:0kB muxing overhead 3.805984%

But I update to 10891 and this starts failing

$ ffmpeg -i test.mp3 -acodec copy test.flv
FFmpeg version SVN-r10891, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
--mandir=/usr/share/man --incdir=/usr/include/ffmpeg 
--extra-cflags=-fPIC --enable-libmp3lame --enable-libfaad 
--enable-libx264 --enable-libxvid --enable-libfaac --enable-libgsm 
--enable-liba52 --enable-liba52bin --enable-libvorbis --enable-libtheora 
--enable-pp --enable-shared --enable-pthreads --enable-gpl 
--enable-libamr-wb --enable-libamr-nb --enable-qcelp --enable-swscaler 
--enable-libogg --disable-strip
  libavutil version: 49.5.0
  libavcodec version: 51.47.2
  libavformat version: 51.17.0
  built on Dec 11 2007 11:59:39, gcc: 4.1.1 20070105 (Red Hat 4.1.1-52)
Input #0, mp3, from 'test.mp3':
  Duration: 00:01:13.9, start: 0.000000, bitrate: 128 kb/s
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, 128 kb/s
File 'test.flv' already exists. Overwrite ? [y/N] y
Output #0, flv, to 'test.flv':
    Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
error, non monotone timestamps 13 >= 0
av_interleaved_write_frame(): Error while opening file