[FFmpeg-trac] #9007(undetermined:new): dash muxer sets invalid bit depth on codecs line with vp9_vaapi encoder

[FFmpeg]

#9007: dash muxer sets invalid bit depth on codecs line with vp9_vaapi encoder
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             Reporter:  aphysically  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  dash         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug: The dash muxer will produce a manifest with a codecs
 line having a "00" value in the bit depth section when using the vp9_vaapi
 encoder. For ex. "vp09.00.21.00" (third value, after 21). This causes the
 DASH playlist to be rejected for playback by Firefox and Chrome. Using
 libvpx with the same muxer settings and such yields "vp09.00.21.08"
 correctly. Spec says valid values for the bit depth are 08, 10, 12.
 How to reproduce:
 Generate a dash manifest with the dash muxer while passing a vp9_vaapi
 encoded video stream to it. Observe the codecs string in the manifest mpd
 file to see the bit depth line. Problem reproduced on master as of
 2020-11-23.

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Ticket URL: <https://trac.ffmpeg.org/ticket/9007>
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