[Bug 754076] videoconvert: overlay negotiation fails

[GStreamer (GNOME Bugzilla)]

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

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

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                 CC|                            |slomo at coaxion.net

--- Comment #3 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
(In reply to Nicolas Dufresne (stormer) from comment #1)
> Review of attachment 309955 [details] [review]:
> 
> (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 ?

You can query the tags of a specific meta, and use that to decide if you can
pass it through or not.

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