[gstreamer-bugs] [Bug 523664] New: v4l2src get_caps() does not return the caps its currently using!

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: HEAD CVS
           Summary: v4l2src get_caps() does not return the caps its
                    currently using!
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: tester at tester.ca
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


v4l2src returns different caps from its get_caps() function every time I call
it.. 

When its called when the pipeline is running, it returns caps that are
incompatible with the ones it called setcaps() with. It should at least cache
those and return them unioned with whatever else it has. Or maybe the FIXME
should be fixed in get_caps()..


Small python program that shows the problem with my Logitech Quickcam Fusion
(where 15/1 is not an acceptable framerate once the device has been opened):

import gst,time

pipeline = gst.parse_launch ("v4l2src ! ffmpegcolorspace ! videoscale !
video/x-raw-yuv,framerate=(fraction)15/1,width=352, height=288,
format=(fourcc)I420 ! identity name=i ! ffmpegcolorspace ! videoscale !
xvimagesink sync=false")

pipeline.set_state(gst.STATE_PLAYING);

time.sleep(1)

i = pipeline.get_by_name("i")

print i.get_pad("src").get_caps().to_string()

pipeline.set_state(gst.STATE_NULL);


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