[Bug 787820] glvideomixer: need update output geo after src caps reconfigure

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=787820

--- Comment #10 from Haihua Hu <jared.hu at nxp.com> ---
(In reply to Matthew Waters (ystreet00) from comment #8)
> (In reply to Haihua Hu from comment #7)
> > (In reply to Matthew Waters (ystreet00) from comment #6)
> > Maybe we can do something like that when width and height is fixed, we do
> > not update it, otherwise update it with our best width and height.
> 
> That is literally the entire point of gst_structue_fixate_nearest_int() ;)

BTW, do we really need to support this kind case? Is there any use case?

videotestsrc ! video/x-raw,width=320,height=240 ! glvideomixer !
video/x-raw(ANY),width=800,height=600 ! fakesink

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