[FFmpeg-trac] #3366(avformat:new): Support muxing pcm_s16be to mp4

[FFmpeg]

#3366: Support muxing pcm_s16be to mp4
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             Reporter:  cehoyos     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mov         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by muken):

 MP4 file format itself has no support of 'raw ' and 'twos'.
 These identifiers are defined in Motion JPEG 2000 file format (15444-3).
 You need add the JP2 Signature Box at the start of file and add 'mjp2'
 brand into the  File Type Box if muxing them.

 By the way, we can mux raw audio into MP4 file format in the near future
 beacause an amendment of MPEG-4 Systems (14496-1) which adds
 objectTypeIndication (0x0C) and decoderSpecificInfo (RAWAudioConfig) of
 raw audio was published recently.
 We only need to wait coding4CC, a 4 character code representing the
 parameters of the raw data as specified by the MPEG-4 Registration
 Authority, to be registered by http://www.mp4ra.org/codecs.html .

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Ticket URL: <https://trac.ffmpeg.org/ticket/3366#comment:2>
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