[FFmpeg-trac] #7883(undetermined:new): Videos with alpha channel are corrupted by scaling

FFmpeg trac at avcodec.org
Mon May 6 18:11:51 EEST 2019


#7883: Videos with alpha channel are corrupted by scaling
-------------------------------------+-------------------------------------
             Reporter:  Acru         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  scale alpha  |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Gyan):

 Can't reproduce it here. Have you checked if alpha channel is relevant -
 check with `format=rgb24`. I suspect your player's decoder can't handle
 4:4:4 format but it still tries. Add `-pix_fmt yuv420p` and check.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7883#comment:3>
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