[FFmpeg-trac] #9538(undetermined:new): eq filter does not maintain transparency

FFmpeg trac at avcodec.org
Mon Nov 29 13:19:29 EET 2021

#9538: eq filter does not maintain transparency
             Reporter:  Jozef        |                    Owner:  (none)
  Chutka                             |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  4.4.1        |               Resolution:
             Keywords:  eq           |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Comment (by Jozef Chutka):

 potential fix is to use alphaextract+alphamerge however this might leave
 dark blending artefacts on semitransparent pixels
Ticket URL: <https://trac.ffmpeg.org/ticket/9538#comment:1>
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