Files
FFmpeg/libavfilter
Nicolas George f3431169da lavfi: do not send premultiplied alpha to filters not ready for it
The arithmetic to process colors in premultiplied alpha is
completely different from the arithmetic for straight alpha.
Running a filter using straight arithmetic on premultiplied
will result in incorrect and sometimes invalid output.
Therefore, premultiplied alpha should only be selected for
filters that either explicitly support it or only use
elementary color arithmetic or none at all.
For other filters, automatic conversion will do its work.
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