[FFmpeg-trac] #4746(swscale:reopened): prores alpha blending results in opaque rectangle

[FFmpeg]

#4746: prores alpha blending results in opaque rectangle
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  projectsymphony                    |                   Status:  reopened
                 Type:  defect       |                Component:  swscale
             Priority:  normal       |               Resolution:
              Version:  git-master   |               Blocked By:
             Keywords:  prores       |  Reproduced by developer:  0
  alpha                              |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by gjdfgh):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 I tried this command line:

 > ./ffmpeg -i ./proresalphablock.mov -pix_fmt yuv420p output.mp4

 And it still produces a broken file with a broken fade.

 @carl: please don't close this again until it's really fixed. Unless you
 really want FFmpeg to produce broken files, but even then consider
 yourself overruled by other ffmpeg devs.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4746#comment:27>
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