I am trying to do the same thing by writing an application. For the receiver, I am creating a udpsrc,  depayloader, decoder and videosink, and linking them together. I am creating them like this: depayloader = gst_element_factory_make("rtph263pdepay", "testrtpplayer_depay"); decoder = gst_element_factory_make("ffdec_h263", "testrtpplayer_dec"); My question is, how do I set the caps of the rtph263pdepay sink pads to accept "application/x-rtp, clock-rate=90000,pt=97"? Thanks, Deeptendu <div>On 8/8/06, M M <<a href="mailto:mikel_m01@yahoo.com">mikel_m01@yahoo.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div> Hi, Thanks!!!, That solved the problem. Regards, Michael</div><div> Philippe Khalaf <<a href="mailto:burgerman@users.sourceforge.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> burgerman@users.sourceforge.net</a>> wrote:</div><div><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"></blockquote></div><div> Hi, Try this : gst-launch udpsrc port=4000 ! application/x-rtp, clock-rate=90000, pt=97 ! rtph263pdepay ! ffdec_h263 ! xvimagesink Regards, Philippe M M wrote: > Hi, > Please I need help on RTP pipeline, I have this pipeline: > > Sender: > gst-launch videotestsrc ! ffenc_h263p ! rtph263ppay ! udpsink port=4000 > Setting pipeline to PAUSED ... > Pipeline is PREROLLING ... > Pipeline is PREROLLED ... > Setting pipeline to PLAYING ... > New clock: GstSystemClock > > Works fine!!! but the Receiver: > > gst-launch udpsrc port=4000 ! rtph263pdepay ! ffdec_h263 ! xvimagesink > OR even > gst-launch udpsrc port=4000 ! rtph263pdepay ! fakesink > > Setting pipeline to PAUSED ... > Pipeline is live and does not need PREROLL ... > Setting pipeline to PLAYING ... > New clock: GstSystemClock > > ** (gst-launch-0.10:29039): CRITICAL **: gst_base_rtp_depayload_chain: > assertion `filter->clock_rate > 0' failed > ERROR: from element /pipeline0/udpsrc0: Internal data flow error. > Additional debug info: > gstbasesrc.c(1569): gst_base_src_loop (): /pipeline0/udpsrc0: > streaming task paused, reason error (-5) > Execution ended after 2564000 ns. > Setting pipeline to PAUSED ... > Setting pipeline to READY ... > Setting pipeline to NULL ... > FREEING pipeline ... > > I traced the error to gstrtph263pdepay.c and gstbasertpdepayload.c and > tried to fix the clockrate, by commenting out checking the structure (in > gstrtph263pdepay.c setcaps), that didn't work. This error unfortunately > exists in all the RTP depayloaders. Maybe I am doing something wrong!. > Please help. > > Regards, > Michael > > ------------------------------------------------------------------------ > See the all-new, redesigned <a href="http://Yahoo.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">Yahoo.com </a>. Check it out. > > > </div><div>> ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? 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