[FFmpeg-trac] #4828(avcodec:open): use Core Audio AAC-encoder and AC3-decoder

[FFmpeg]

#4828: use Core Audio AAC-encoder and AC3-decoder
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             Reporter:  julian       |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  osx          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by julian):

 > Have you confirmed that the AC3 licence on Apple equipment permits non-
 Apple use?

 Apple has definitely a AAC license for Core Audio that all developers can
 use, i'll post any resources on this
 AC3 encoding has just been added to 'afconvert' to there hope this will
 soon be the same. Also AC3 expires in 2017 so its not as bad as AAC.

 > I believe it is very unlikely that you succeed to configure FFmpeg so
 that it does not use patent-covered algorithms.

 can you elaborate. e.g. what patents would the process of just remuxing
 MKV to MP4 using ffmpeg without converting audio or video violate?

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Ticket URL: <https://trac.ffmpeg.org/ticket/4828#comment:5>
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