[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 Elon Musk):

 Please provide original input png files, and expected ooutput. Do not post
 ffmpeg output.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9750#comment:8>
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