[Bug 740636] v4l2src: framerate is not always set on driver

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740636
  GStreamer | gst-plugins-good | 1.4.4

--- Comment #4 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> 2014-12-09 23:40:45 UTC ---
The context is that until recently, we had terrible hack that would get/set
format while probing. This was actually leading toward format changing all the
time. Clearly that had drastic performance issue, since getting/setting format
thousands of times can take time. Though there is no measurable rational for
avoiding a single format set, and this code has been the source of bugs for a
long time. So I think we should just strip it up, and always set the format and
the framerate.

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