[Bug 704070] video: Add Region Of Interest (roi) meta

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=704070
  GStreamer | gst-plugins-base | 1.x

--- Comment #14 from Sebastian Dröge <slomo at circular-chaos.org> 2013-07-16 08:00:59 UTC ---
(In reply to comment #12)

> > @@ +536,3 @@
> > +{
> > +  static volatile GType type;
> > +  static const gchar *tags[] = { "location", " size", NULL };
> > 
> > This should be orientation and size, location has no meaning yet. What do you
> > mean with location here?
> > 
> 
> I understood
> x,y -> location of the roi (anchor point)
> w,h -> size of the roi

The tags are there to specify to which aspects of a buffer the meta applies,
i.e. if the size changes the meta needs to be transformed or removed.

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