https://bugs.kde.org/show_bug.cgi?id=512943

--- Comment #6 from Ron <[email protected]> ---
(In reply to Gabriel Gazzán from comment #5)
> To me, (knowing nothing of Kdenlive/MLT code, but knowing quite something
> about compositing) I see it as a problem with how the alpha is treated (i.e.
> direct vs. premultiplied) during the composition phase of the tracks. 🤷‍♂️

Yes, cf. the reference to
https://blog.johnnovak.net/2016/09/21/what-every-coder-should-know-about-gamma/
in that forum discussion.  We're seeing that sort of thing in lots of effects
where there is a fade to alpha or
feathered blending going on.

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