[FFmpeg-trac] #7965(avcodec:open): Support for HEVC with Alpha

[FFmpeg]

#7965: Support for HEVC with Alpha
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             Reporter:  leemartin    |                    Owner:  (none)
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  hevc         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Alexander):

 It would be great to see HEVC alpha transparency supported in FFMpeg. It
 might look like a minor issue but it’s really not. In WebGL toolkits like
 Verge3D, transparent textures are used to create various cool effects. In
 Chrome/Firefox/Edge we have WebM, but for Safari (for both desktop and
 mobile), HEVC is the only option. Right now we
 [https://www.soft8soft.com/wiki/index.php/Video_textures_and_alpha_transparency
 recommend] our users to use FFMpeg with VideoToolbox encoder, but it is
 limited to Macs only.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7965#comment:12>
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