[Bug 725860] v4l2src: Fix using v4l2src with Hauppauge HDPVR video capture device

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=725860
  GStreamer | gst-plugins-good | 1.2.3

--- Comment #27 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-04-01 17:05:26 UTC ---
Ok. this was fixed partially in master by:

commit b80169a16abb8526e5d766fa3e7cc04c6667db3e
Author: Nicolas Dufresne <nicolas.dufresne at collabora.com>
Date:   Mon Dec 2 15:26:50 2013 -0500

    v4l2object: Don't validate dimension for encoded format

    We set the dimensions just in case but don't validate them
    afterwards. For some codecs the dimensions are *not* in the
    bitstream, IIRC VC1 in ASF mode for example.

    https://bugzilla.gnome.org/show_bug.cgi?id=720568

and then this latest patches fixes few criticals, and avoid reconfiguring the
devices if it's already configured properly. Thanks for taking the time to test
all this. I'll see if I can backport all this in stable branch.

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