[FFmpeg-trac] #6466(undetermined:new): Compression Artifacts in the Alpha Channel

[FFmpeg]

#6466: Compression Artifacts in the Alpha Channel
-------------------------------------+-------------------------------------
             Reporter:  NNois        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  prores       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hi,

 There's high compression artifacts using the codec "prores_ks" with an
 Alpha channel (4444 mode)

 example:

 {{{
 ffmpeg -i intranspfile.mov -c:v prores_ks -profile:v 4 -pix_fmt
 yuva444p10le -profile 4444 -metadata:s encoder="Apple ProRes 4444" -vendor
 apl0 -acodec pcm_s16le -f mov outfile.mov
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6466>
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