[Bug 785706] vaapipostproc: upstream caps negotiation fails

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785706

--- Comment #2 from Víctor Manuel Jáquez Leal <vjaquez at igalia.com> ---
I've tested these pipelines on current master and 1.12 replacing appsrc with
videotestsrc


(In reply to Tomas Rataj from comment #0)
> gst-launch-1.0 appsrc is-live=true
> caps="video/x-raw,format=BGRx,width=1280,height=1024,framerate=20/1" !
> videorate ! vaapipostproc ! video/x-raw,format=NV12,framerate=10/1 ! fakesink

This still fails. In my understanding it fails because videorate sets an
already fixated caps by setting itself as passthrough.


> gst-launch-1.0 appsrc is-live=true
> caps="video/x-raw,format=BGRx,width=1280,height=1024,framerate=20/1" !
> videorate ! video/x-raw,framerate=10/1 ! vaapipostproc !
> video/x-raw,format=NV12 ! fakesink

But this one is working as expected.

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