[Webkit-unassigned] [Bug 233955] New: [GTK] Video alpha channel doesn't work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233955

            Bug ID: 233955
           Summary: [GTK] Video alpha channel doesn't work
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zipdox at protonmail.com

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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