[FFmpeg-trac] #9862(avfilter:new): Can't render subtitles on a transparent video

[FFmpeg]

#9862: Can't render subtitles on a transparent video
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             Reporter:  fduck        |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avfilter
              Version:  unspecified  |               Resolution:
             Keywords:  subtitles    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Carl Eugen Hoyos):

 Please provide the command line you tested together with the complete,
 uncut console output to make this a valid ticket.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9862#comment:1>
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