[Bug 720568] v4l2: Various changes to allow using M2M decoders

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=720568
  GStreamer | gst-plugins-good | git

--- Comment #53 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-01-06 14:46:49 UTC ---
(In reply to comment #40)
> (From update of attachment 264361 [details])
> Which size would it use by default otherwise? Maybe the devices will give use
> reasonable values already and values that work better with this specific device
> than 1MB?

Currently the drivers sets this size to about 200kb, regardless of the input.
V4L2 documentation does not say anything about it. We should probably ask
Benjamin to see if other driver do something smarter. In the end we probably
need some minimum base on the codec + video size.

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