[Bug 766184] Video distrion with VAAPI when using tee element

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=766184

Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |nicolas at ndufresne.ca

--- Comment #4 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
(In reply to Scott D Phillips from comment #3)
> This happens because tee doesn't proxy allocation queries (by design, I
> think) and there are some problems with the correctness of the outputs of
> the vaapi elements when the downstream elements don't take the video meta.
> I'll work on a patch for this.

Tee indeed don't proxy allocation, it's not by design, but because we don't yet
know how to aggregated the queries. We should probably try and aggregate metas
like VideoMeta, as it will cause copies in correctly implemented element.

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