[FFmpeg-trac] #3602(avformat:new): Use Matroska A_QUICKTIME instead of deprecated A_QUICKTIME/**** (A_QUICKTIME/QDMC, A_QUICKTIME/QDM2) Codec IDs.

[FFmpeg]

#3602: Use Matroska A_QUICKTIME instead of deprecated A_QUICKTIME/****
(A_QUICKTIME/QDMC, A_QUICKTIME/QDM2) Codec IDs.
-------------------------------------+-------------------------------------
             Reporter:  Vika         |                    Owner:
  Apelsinova                         |                   Status:  new
                 Type:  enhancement  |                Component:  avformat
             Priority:  wish         |               Resolution:
              Version:  git-master   |               Blocked By:
             Keywords:  mkv          |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by Vika Apelsinova):

 Unfortunately, I can't test QDMC. Looks like QDMC is not supported by any
 open source software. Is FFMPEG support it? Is there open source QDMC
 decoder at all?

 Regarding QDM2, please look
 https://trac.ffmpeg.org/ticket/3256#comment:12. I just can't make the
 patch because don't know what should be changed in the source code.

 Over 5 years (see https://trac.bunkus.org/ticket/354#comment:1) there was
 no player that I know that supports QDM2 in MKV until
 https://trac.videolan.org/vlc/ticket/11038 was recently closed.

 All players now that support A_QUICKTIME, support deprecated
 A_QUICKTIME/QDM2 CodecID too (for legacy compatibility purposes),
 therefore I can't find player that fails for files created by current
 version of FFMPEG, but according to Matroska specs
 (http://matroska.org/technical/specs/codecid/index.html) A_QUICKTIME/QDMC
 and A_QUICKTIME/QDM2 CodecIDs is deprecated in favor of A_QUICKTIME
 (without a trailing codec name) and FFMPEG should not produce files with
 deprecated CodecIDs and should produce files that correspond to current
 specifications.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3602#comment:4>
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