[FFmpeg-trac] #10862(avformat:new): Register AV1-related Dolby Vision codec tag - 'dav1'

[FFmpeg]

#10862: Register AV1-related Dolby Vision codec tag - 'dav1'
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:
  maciej.kolanski                    |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
                                     |  unspecified
             Keywords:  av1          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 FFmpeg does not recognize 'dav1' codec tag and rejects such streams with:

 {{{
 Could not find codec parameters for stream 0 (Video: none, 1 reference
 frame (dav1 / 0x31766164), none, 3840x2160 (0x0), 34009 kb/s): unknown
 codec
 }}}

 'dav1' tag is registered in the MPEG-4 Registration Authority:
 https://github.com/mp4ra/mp4ra.github.io/issues/101

 There is already an open patch for this very issue:
 https://patchwork.ffmpeg.org/project/ffmpeg/patch/20230315185711.4800-1-jamrial@gmail.com/
 but I didn't find any related ticket in the bug tracker.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10862>
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