Bad output framerate decision

[jwjwjw]

Summary of the bug:

The attached sample file does not play properly once encoded in ffmpeg using the latest git-master. The video either freezes while the audio plays or the video is too jerky. During the encode the following appears:

[mov,mp4,m4a,3gp,3g2,mj2 @ 0x65e240] multiple edit list entries, a/v desync might occur, patch welcome

Despite this though, the file does encode and play fine (including the above message during the encode process) using earlier version N-31890-gecaf514 so I reasonably conclude that it is a regression bug.

How to reproduce:

% ffmpeg -i bbc1_sample.mp4 -report bbc1_freeze.mp4
ffmpeg version N-43888-gfef9e84 Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 25 2012 01:37:52 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --enable-shared --enable-libmp3lame --enable-gpl --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-libvpx --extra-libs=-lgcrypt --disable-altivec --disable-armv5te --disable-armv6 --disable-vis

[jwjwjw]

Partial sample original mp4 file used during encode process

[jwjwjw]

Encoded file using latest git-master

[jwjwjw]

Encoded file using N-31890-gecaf514

[jwjwjw]

Report log of encode process using latest git-master

[cehoyos]

Regression since 5c5306d, workaround is to use -r 25.