[Bug 702638] v4l2: Optimize negotiation by removing the query filter

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=702638
  GStreamer | gst-plugins-good | git

--- Comment #2 from Sjoerd Simons <sjoerd at luon.net> 2013-06-19 11:56:57 UTC ---
The problem here is that the camera caps are quite specific e.g (my camera has
28 different resolutions it can do, both in YUYV and MJPG (56 caps entries),
which about doubles again once you start doing the emulated formats through
libv4l).

All these tend to be of the following form, so don't easily simplify:
video/x-raw, height=1280,width=720, framerate=15/1,
 video/x-raw,height=640, width=320, framerate=30/1.
 etc etc.

While the remainder of the pipeline has a bunch of transform elements, so the
"full" set will be all the original entries expanded with all the possible
transformations.. Which turns out to be a lot...

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