Python 3, RTP, Udpsink, and Getting the Caps

[gstnewbiepants]

Hey Guys, 

I've searched through forums and used the Googler but I've had no luck...
I'm trying to get the Caps from the Udpsink elements pad, but I want to do
it pragmatically from within Python.  I'm using GStreamer 1.0, Python 2.7,
GTK+3, and PyGI.  Right now the code looks like this:

        print self.udpsink.set_locked_state(Gst.State.PLAYING)
        print self.pipeline.set_state(Gst.State.PLAYING)
	pad = self.udpsink.get_static_pad('sink')
	print str(pad.get_property('caps'))

When running this only "None" is printed from the last line.  Here's the
actual pipeline with gst-launch

gst-launch-1.0 -v autovideosrc ! videoscale ! videoconvert !
video/x-raw,format=\(string\)UYVY,width=\(int\)640,height=\(int\)480,framerate=\(fraction\)30/1
! videoscale ! videoconvert ! avenc_mpeg4 ! rtpmp4vpay ! udpsink
host=127.0.0.1 port=5000 force-ipv4=true

The pipeline actually works, but the video quality is horrible.  I figure if
I write the caps out to a file and have the client read it then things will
be better.  I do already have a jitter buffer with a latency of 100 ms on
the client though.

I just started using Gstreamer, and I will take any advice regarding
anything at all.

Thanks!
Newb



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