#8509: Converting 8 bit ARGB to Prores 4444 using prores_ks produces alpha
channel
that is not 100% opaque
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Reporter: bford | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: prores | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by bford):
I dont think so. The alpha channel itself should not be undergoing any
color space conversion.
The RGB components would convert to YUV and back; but the Alpha should not
be affected.
It would however undergo an 8bit to 16bit conversion as I believe it is
being stored as 16bit in the output file, and that could be where the
issue comes from.
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Ticket URL: <https://trac.ffmpeg.org/ticket/8509#comment:3>
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