[FFmpeg-trac] #4746(avcodec:new): prores alpha blending results in opaque rectangle

FFmpeg trac at avcodec.org
Thu Jul 30 21:31:12 CEST 2015


#4746: prores alpha blending results in opaque rectangle
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  projectsymphony                    |                   Status:  new
                 Type:  defect       |                Component:  avcodec
             Priority:  normal       |               Resolution:
              Version:  git-master   |               Blocked By:
             Keywords:               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by michael):

 The file plays fine, but the player you use ignores alpha. (many players
 ignore alpha, isnt really wrong if they do if theres nothing behind)

 if you render the file over a black background you get the fading

 {{{
 ./ffplay proresalphablock.mov  -vf
 'scale[in],color=black:1920x1080[back],[back][in]overlay'
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4746#comment:7>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list