[FFmpeg-trac] #9750(avfilter:new): overlay filter alpha premultiplied performs brighter on transparent images

[FFmpeg]

#9750: overlay filter alpha premultiplied performs brighter on transparent images
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             Reporter:  windowsair  |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by windowsair):

 Hi, thanks for your quick reply!

 As per your instructions, I tested different color spaces and some of the
 results are as follows:

 yuv420, yuv422, yuv444: Consistent with the original results.

 yuv420p10, yuv422p10: Not the result of alpha premultiplied, the result is
 the same as using alpha straight.


 It's a little weird.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9750#comment:4>
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