[FFmpeg-trac] #7941(undetermined:reopened): Transparency broken when encoding animated webp

[FFmpeg]

#7941: Transparency broken when encoding animated webp
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             Reporter:  Nirel d      |                    Owner:  (none)
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  webp alpha   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Cabada):

 Replying to [comment:19 Mario Zechner]:

 > +            avio_w8(s->pb, 0x1);

 I can confirm that the change that Mario suggests works, but it adds more
 bytes to the result.

 Can we have it added as an option so we can decide which disposal method
 to use? For transparent animated images we need this.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7941#comment:21>
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