[FFmpeg-trac] #1436(undetermined:new): transcoding .aac to mp4

[FFmpeg]

#1436: transcoding .aac to mp4
-------------------------------------+-------------------------------------
             Reporter:  Silly        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  aac mp4      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When transcoding .aac audio files to .mp4 (regardless of output audio
 codec) files, audio is broken (different effect depending on player).

 How to reproduce:
 I have used Blue Öyster Cult - Don't Fear the Reaper song in stereo 16 bit
 pcm 44,100Hz .wav file as my source, from which I produced a .aac (-strict
 experimental -acodec aac) and .mp3 (-acodec libmp3lame).
 I then transcoded both into .mp4 in different variations (without
 parameters to conserve audio or with the parameters above to change audio
 stream).
 The results were consistent, using aac as source broke my mp4 audio
 regardless of output audio codec.
 Using mp3 source went fine regardless of output audio codec.

 My ffmpeg was built according to:
 https://ffmpeg.org/trac/ffmpeg/wiki/CentosCompilationGuide
 {{{
 ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
   configuration: --enable-gpl --enable-libmp3lame --enable-libtheora
 --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-version3
   libavutil      51. 55.100 / 51. 55.100
   libavcodec     54. 23.100 / 54. 23.100
   libavformat    54.  6.101 / 54.  6.101
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     2. 77.100 /  2. 77.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Hyper fast Audio and Video encoder

 Red Hat Enterprise Linux Server release 5.8 (Tikanga)
 2.6.18-194.el5xen
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1436>
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