[FFmpeg-trac] #3302(avfilter:open): Cannot draw opaque text on transparent frame

[FFmpeg]

#3302: Cannot draw opaque text on transparent frame
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             Reporter:  Krieger     |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  drawtext    |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Comment (by Krieger):

 It turned out to be not easy.
 After fighting with drawutils, which doesn't work with `dst` transparency
 by default, i'm getting inconsistent results, will show in attachments.

 Seems at the moment there's no suitable mechanism in FFmpeg for subject
 feature, and modifying drawutils code is quite tricky. Any comments and
 propositions are appreciated.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3302#comment:3>
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