[Bug 638300] v4l2src: make this work more than once in a row

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=638300
  GStreamer | gst-plugins-good | unspecified

--- Comment #9 from Stefan Kost (gstreamer, gtkdoc dev) <ensonic at sonicpulse.de> 2011-08-25 23:05:14 UTC ---
Just some digging. This commit had added the framerate comparison:

commit e605a94e4093e1304b153ab1baf3e5ccef7562e8
Author: William M. Brack <wbrack at mmm.com.hk>
Date:   Tue Mar 25 12:33:09 2008 +0000

    sys/v4l2/v4l2src_calls.c: Check whether the device supports setting the
framerate before trying to set it and then po...

    Original commit message from CVS:
    Based on patch by: William M. Brack <wbrack at mmm com hk>
    * sys/v4l2/v4l2src_calls.c: (fractions_are_equal),
    (gst_v4l2src_set_capture):
    Check whether the device supports setting the framerate before
    trying to set it and then posting a warning or error if it doesn't
    work (#516649, #520092). Also compare fractions more correctly.

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