[FFmpeg-trac] #1784(undetermined:new): internal aac encoder fails with 5.1 input

[FFmpeg]

#1784: internal aac encoder fails with 5.1 input
-------------------------------------+-------------------------------------
             Reporter:  rogerdpack   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: with 5.1 audio input, the internal aac encoder seems
 to produce "garbled" output

 How to reproduce:
 {{{
 %ffmpeg-20120903-git-5d55830-win32-static\bin\ffmpeg -i yo.raw.wav
 -acodec aac -strict experimental -ac 6 -ab 384k -y yo.aac
 ffmpeg version N-44123-g5d55830 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Sep  2 2012 20:23:29 with gcc 4.7.1 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-pthreads
 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-
 frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-
 libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-
 libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo
 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      51. 70.100 / 51. 70.100
   libavcodec     54. 55.100 / 54. 55.100
   libavformat    54. 25.104 / 54. 25.104
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3. 15.102 /  3. 15.102
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [wav @ 01f3c720] max_analyze_duration 5000000 reached at 5001333
 Input #0, wav, from 'yo.raw.wav':
   Duration: 00:00:14.43, bitrate: 4608 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 5.1,
 s16, 4608 kb/s
 Output #0, adts, to 'yo.aac':
   Metadata:
     encoder         : Lavf54.25.104
     Stream #0:0: Audio: aac, 48000 Hz, 5.1, flt, 384 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> aac)
 Press [q] to stop, [?] for help
 size=     277kB time=00:00:14.44 bitrate= 157.4kbits/s
 video:0kB audio:273kB subtitle:0 global headers:0kB muxing overhead
 1.697209%
 }}}

 The resultant aac file has seemingly lost "most" channels.  Encoding the
 same with libfdk_aac seems to work fine with all 6 channels.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1784>
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