[Bug 797100] videoaggregator: allocation query management makes buffering suboptimal when using dynamic/live pipelines

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797100

--- Comment #2 from Thibault Saunier <tsaunier at gnome.org> ---
(In reply to Sebastian Dröge (slomo) from comment #1)
> A property for this could be added, or we could document that an identity
> with drop-allocations=true should be placed right after the compositor in
> such situations.
> 
> Both seem more like a hack than anything else though.

Right, sounds like a hack to me, probably a useful one but I wonder if we could
mitigate the drawback of that solution. Maybe behind a property we could try to
figure out if the previous allocation query result can be reused and do so if
it is the case? Dropping the query all together otherwise. If it is the first
negotiation, always do the query. I have not looked deeper into how that could
be done yet.

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