[FFmpeg-trac] #3846(avcodec:new): The output video show a wrong alpha

[FFmpeg]

#3846: The output video show a wrong alpha
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             Reporter:  Noir89         |                    Owner:
                 Type:  defect         |                   Status:  new
             Priority:  normal         |                Component:  avcodec
              Version:  git-master     |               Resolution:
             Keywords:  ProRes, alpha  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
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Comment (by kurosu):

 OK, I dug a bit more, you need to specify "-profile 4444" on the command
 line. In the meantime, I'll see what to do about the user friendliness of
 that.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3846#comment:9>
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