title: GStreamer UDP send/receive one-liner
body: <p>I'm trying to stream <code>v4l2src</code> over UDP using GStreamer.
  The sending part is (apparently) ok, but the receiving part is missing something.</p>
  
  <p>Those are the actual lines:</p>
  
  <p>Send:
  <code>
  gst-launch-0.10 -v gstrtpbin name=rtpbin v4l2src device=/dev/video0 ! 'video/x-raw-yuv, width=(int)320, height=(int)240, framerate=(fraction)15/1' ! rtpvrawpay ! rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 ! multiudpsink clients="127.0.0.1:9996" rtpbin.send_rtcp_src_0 ! multiudpsink clients="127.0.0.1:9997" sync=false async=false udpsrc port=10000 ! rtpbin.recv_rtcp_sink_0
  </code></p>
  
  <p>Receive:
  <code>
  gst-launch-0.10 -v gstrtpbin name=rtpbin udpsrc caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)YUV, depth=(string)8, width=(string)320, height=(string)120, colorimetry=(string)SMPTE240M" port=9996 ! rtpbin.recv_rtp_sink_0 rtpbin. ! rtpvrawdepay ! video/x-raw-yuv,framerate=15/1 ! xvimagesink udpsrc port=9997 ! rtpbin.recv_rtcp_sink_0 rtpbin.send_rtcp_src_0 ! multiudpsink clients="127.0.0.1:10000" sync=false async=false
  </code></p>
  
  <p>What am I missing? </p>
  
  <p>Regards</p>
  
  <p>EDIT:</p>
  
  <p>Some of the caps were missing so I added them and now the receiver doesn't crash but just idles without showing anything.</p>
  
  <p>Send:
  <code>
  gst-launch-0.10 -v gstrtpbin name=rtpbin v4l2src device=/dev/video0 ! 'video/x-raw-yuv, width=(int)320, height=(int)240, framerate=(fraction)15/1' ! rtpvrawpay ! rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 ! multiudpsink clients="127.0.0.1:9996" rtpbin.send_rtcp_src_0 ! multiudpsink clients="127.0.0.1:9997" sync=false async=false udpsrc port=10000 ! rtpbin.recv_rtcp_sink_0
  </code></p>
  
  <p>Receive:
  <code>
  gst-launch-0.10 -v gstrtpbin name=rtpbin udpsrc caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)YCbCr-4:2:0, depth=(string)8, width=(string)320, height=(string)240, colorimetry=(string)SMPTE240M, ssrc=(uint)956768427, payload=(int)96, clock-base=(uint)1415613946, seqnum-base=(uint)35008" port=9996 ! rtpbin.recv_rtp_sink_0 rtpbin. ! rtpvrawdepay ! video/x-raw-yuv,framerate=15/1 ! xvimagesink udpsrc port=9997 ! rtpbin.recv_rtcp_sink_0 rtpbin.send_rtcp_src_0 ! multiudpsink clients="127.0.0.1:10000" sync=false async=false
  </code></p>