[Bug 749517] aggregator: need support for sparse streams

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=749517

--- Comment #7 from Philippe Renon <philippe_renon at yahoo.fr> ---
PS: Some docs might be a bit obsolote.

in gstaggregator.c the following seems to be not true anymore :

 *    When data is queued on all pads, tha aggregate vmethod is called.


in gstvideoaggregator.c the following depends on what the derived classes do :

 * VideoAggregator can accept AYUV, ARGB and BGRA video streams. For each of
the requested
 * sink pads it will compare the incoming geometry and framerate to define the
 * output parameters. Indeed output video frames will have the geometry of the
 * biggest incoming video stream and the framerate of the fastest incoming one.

in compositor.c more formats are handled :

 * Compositor can accept AYUV, ARGB and BGRA video streams. For each of the
requested
 * sink pads it will compare the incoming geometry and framerate to define the
 * output parameters. Indeed output video frames will have the geometry of the
 * biggest incoming video stream and the framerate of the fastest incoming one.

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