[Webkit-unassigned] [Bug 225961] [GStreamer] Incorrect rendering of VP9 with transparency

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=225961

Nicolas Dufresne <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |nicolas at ndufresne.ca

--- Comment #1 from Nicolas Dufresne <nicolas at ndufresne.ca> ---
"Rendered correctly" is not totally accurate. So according to Firefox and Chromium implementation, WebM always produces straight colors. Good thing, since GStreamer only support that also.

Though, what I notice is that the compositor in WebKit assumes premultiplied colors, that will looks ok-ish, as loing as the transparent pixels have no color information.

>From quick look, it seems like a knob missing, but that Straight vs Premultiplied is already something supported over-all.

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