[Bug 685282] dvdspu: figure out how to make it work with hardware decoders and subpicture overlays

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=685282
  GStreamer | gst-plugins-bad | git

--- Comment #12 from Holger Kaelberer <hk at getslash.de> 2013-11-26 08:16:07 UTC ---
(In reply to comment #11)
> Just an idea, does anyone see any potential issues in adding multiple
> GstVideoOverlayRectangles to the composition instead of just one big rectangle?

We do this for a while for custom OSD elements in s/w and h/w (vaapi/libva)
based pipelines with ARGB overlay data and it works like charm. In h/w
accelerated pipelines you don't have a benefit in terms of blending performance
because vaapi and vdpau can do this completely in hardware. Though, in the case
of vaapi there is a limit of max. 8 (vdpau-driver/libva) or 4 (current
intel-driver) subpictures (i.e. GstVideoOverlayRectangles), iirc.

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