[Bug 754076] videoconvert: overlay negotiation fails

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754076

--- Comment #1 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> ---
Review of attachment 309955:
 --> (https://bugzilla.gnome.org/review?bug=754076&attachment=309955)

(Small note, I believe I wrote this patch ;-P) My concern with this PoC is that
the caps negotiation becomes much wider the  what we actually support. I have
the impression that there should be some conditions base on being pass-through
or not.

For meta:VideoCompositionOverlay it totally make sense to me. For
meta:VideoCrop also, but for some other meta (which might not exist yet) will
it still make sense ? And if not, how will we make it negotiation properly ?

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