#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):
Yes, that resolves the issue!
I think I can see what you've done there.. 255 << 6 = 16320 (not 16384),
so you have to account for the difference by adding (255 >> 2) = 63.
Thank you very much for investigating this for me!
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Ticket URL: <https://trac.ffmpeg.org/ticket/8509#comment:6>
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