[FFmpeg-trac] #9883(ffmpeg:new): FFmpeg AVIF decoder does not seem to handle transparency when decoding YUV420P

[FFmpeg]

#9883: FFmpeg AVIF decoder does not seem to handle transparency when decoding
YUV420P
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             Reporter:  btdmaster    |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  transparent  |               Blocked By:
             Blocking:  #7621        |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by btdmaster):

 * Attachment "transparency-present.avif" added.

 Demonstrates AVIF transparency
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Ticket URL: <https://trac.ffmpeg.org/ticket/9883>
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