[Bug 666090] videoconvert: Add support for GST_VIDEO_FLAG_PREMULTIPLIED_ALPHA
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Fri Mar 20 02:00:23 PDT 2015
https://bugzilla.gnome.org/show_bug.cgi?id=666090
Wim Taymans <wim.taymans at gmail.com> changed:
What |Removed |Added
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CC| |wim.taymans at gmail.com
--- Comment #3 from Wim Taymans <wim.taymans at gmail.com> ---
video-convert should use premultiplied alpha when doing scaling or else you can
get wrong colors from neighbouring pixels with 0 alpha.
video-convert should therefore look at the input video-info flags and
premultiply before scaling if needed, then look at the output flags and
unpremultiply if needed.
We don't have anything in the caps to mark premultiplied alpha.
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