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

FFmpeg trac at avcodec.org
Thu Jul 30 16:27:44 CEST 2015


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

Comment (by gjdfgh):

 The output is an alpha format, so lavc doesn't blend anything. This is
 probably a libswscale problem, rather than libavcodec. Or possibly prores
 doesn't use straight alpha, or the alpha is inverted, or whatever else
 could go wrong.

 Please post a sample file.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4746#comment:1>
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