[FFmpeg-trac] #2605(avformat:new): Raw audio in MP4 container

[FFmpeg]

#2605: Raw audio in MP4 container
-------------------------------------+-------------------------------------
             Reporter:  asukhanov    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
             Keywords:  MOV MP4      |  unspecified
  demuxer                            |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I found that commit http://ffmpeg.org/pipermail/ffmpeg-
 cvslog/2012-March/048842.html
 breaks MOV demuxing in case if input file has PCM audio inside and wrong
 STSZ sample_size for this audio trak.

 I have a file which I successfully transcoded with ffmpeg before this
 patch:

 Audio trak is PCM signed 16 LE.
 Timescale = 44100
 num_channels = 2
 bits_per_sample = 16

 Each sample duration = 1, so Each sample size should be = num_channels *
 bits_per_sample / 8 * duration = 4 bytes
 But STSZ wrongly has sample_size = 1 byte.

 I uploaded file on ftp://upload.ffmpeg.org:
 audio_silence_after_ffmpeg_upgrade.mov

 Before this patch
 http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=50059bde77674977d9134f3c1151a63cb7a2391c
 ffmpeg was able to fix this stream error and decode audio successfully.

 How to reproduce:

 % ffplay audio_silence_after_ffmpeg_upgrade.mov

 ffplay version git-2013-05-15-1a36c75 Copyright (c) 2003-2013 the FFmpeg
 developers
   built on May 14 2013 19:05:26 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-
 libx264 --enable-libfaac --enable-libmp3lame --extra-
 cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib
   libavutil      52. 31.100 / 52. 31.100
   libavcodec     55.  9.100 / 55.  9.100
   libavformat    55.  7.100 / 55.  7.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 67.100 /  3. 67.100
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2605>
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