[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 James):

 Replying to [comment:15 Igor]:
 > I noticed a recent commit that adds (some) support for packaging HEVC
 with alpha layer.
 >
 https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/17e4746687abc53f0a042620a7af6dd6cea44b80
 >
 > However, I still cannot get a video that works. I am trying the
 following
 > {{{
 > ffmpeg -vcodec libvpx-vp9 -i input.webm -c:v libx265 -x265-params
 "alpha=1" output.mp4
 > }}}

 Can you upload the output? I don't have a new enough libx265 to generate
 one.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7965#comment:17>
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