[FFmpeg-trac] #929(avcodec:new): AAC 5.1 channel decoding issue

[FFmpeg]

#929: AAC 5.1 channel decoding issue
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             Reporter:  kaijun61    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  AAC         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by cehoyos):

 Replying to [comment:4 kaijun61]:
 > I use gstreamer-based player to test ffmpeg aac codec in ffmpeg shared
 library.

 Generally, if you see a problem with a third-party application using
 FFmpeg, you should always try to reproduce the problem with ffmpeg (the
 application) itself, after all, it may be possible that the bug is in the
 third-party application and not in FFmpeg, don't you agree?

 > This issue shouldn't do anything with "--enabled-shared".

 Probably not (and I said so), but something seems to be weird with your
 binary (note the warnings), and it is often simpler to reproduce issues
 with static linking.

 > using "--disabled-optimization" is easy for debugging in our build
 environment.

 I understand, that is the same reason why I prefer static linking for
 testing problems.

 > How to reproduce the problem with ffmpeg? I don't see downmixing option
 for AAC decoding.

 So you want to report a downmixing problem in FFmpeg while claiming
 downmixing is not supported?
 ;-)

 Seriously: Please test ffmpeg -i test.mp4 -ac 2 out.wav (it works fine
 here for multichannel aac) to get an output file with downmixed audio and
 report back if it works.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/929#comment:5>
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