#9626: alphamerge and transparency in main
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Reporter: Jozef | Owner: (none)
Chutka |
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Michael Koch):
> When alphamerge alpha has white pixels where in has transparent, those
are expected to result transparent on out, however ffmpeg renders it with
some(?) color.
It's the other way round. Black pixels become alpha=0 and that's
transparent. White pixels become alpha=255 and that's opaque.
In my opinion the output of the alphamerge filter is correct, and the
output of the overlay filter is also correct.
Michael
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Ticket URL: <https://trac.ffmpeg.org/ticket/9626#comment:2>
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