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

[FFmpeg]

#7941: Transparency broken when encoding animated webp
-------------------------------------+-------------------------------------
             Reporter:  nireldidi    |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:  ffmpeg       |                  Version:  git-
             Keywords:  gif alpha    |  master
  webp animated                      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg -i test.gif animation.webp

 How can I convert animated gif (with Alpha channel) to animated webp?

 I stuck with transparent background, I can't figure out how to convert gif
 with transparent background to webP with transparent background, Its keep
 a 'trail' of the images,

 ffmpeg -i test.gif animation.webp

 For example, I want to convert this gif - ​https://imgur.com/tCSn2No to
 webP,
 The output for now is -
 ​https://media.giphy.com/media/UqevOuKr66xO04zRBa/giphy.gif

 how can I achieve that using ffmpeg?

 ffmpeg version N-93933-geae251ead9 built with gcc 8.3.1

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Ticket URL: <https://trac.ffmpeg.org/ticket/7941>
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