Bug 233955

Summary:	[GTK] Video alpha channel doesn't work
Product:	WebKit	Reporter:	zipdox
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	cadubentzen, teodor.atroshenko, webkit-bug-importer
Priority:	P3	Keywords:	Gtk, InRadar
Version:	Other
Hardware:	PC
OS:	Linux

zipdox

Reported 2021-12-07 15:30:16 PST

I originally reported this to Epiphany but I was directed here. https://gitlab.gnome.org/GNOME/epiphany/-/issues/1654 The WebM container supports alpha channel video with the VP8 and VP9 codecs, however in Epiphany this doesn't work. Transparent video is shown with a black background instead.

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Carlos Bentzen

Comment 1 2024-03-28 18:21:23 PDT

The issue is with the dma-buf sink. Both the GL and software-compositing sinks render with the alpha channel blending correctly (done in https://commits.webkit.org/238313@main). To not use the dma-buf sink, set WEBKIT_GST_DMABUF_SINK_DISABLED=1. Fix for dma-buf incoming...

Carlos Bentzen

Comment 2 2024-03-28 18:34:59 PDT

Pull request: https://github.com/WebKit/WebKit/pull/26598

EWS

Comment 3 2024-04-02 09:14:04 PDT

Committed 276936@main (aff02c3a8c4f): <https://commits.webkit.org/276936@main> Reviewed commits have been landed. Closing PR #26598 and removing active labels.

Radar WebKit Bug Importer

Comment 4 2024-04-02 09:15:20 PDT

<rdar://problem/125786839>

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