Hi I am also working on the similar thing but it seems I have a problem that I cannot Identify. I am trying to link gstrtpbin to rtptheoradepay on the Client side I am now on the recieving side of the gstrtobin heres my link: -------------------------------------------------------------------------------------------------------------------------------------------------------- static void pad_added_cb (GstElement * rtpbin, GstPad * new_pad, GstElement * depay) { GstPad *sinkpad; GstPadLinkReturn lres; g_print ("new payload on pad: %s\n", GST_PAD_NAME (new_pad)); sinkpad = gst_element_get_static_pad (depay, "sink"); g_assert (sinkpad); lres = gst_pad_link (new_pad, sinkpad); g_assert (lres == GST_PAD_LINK_OK); gst_object_unref (sinkpad); } and I call it using: g_signal_connect (rtpbin, "pad-added", G_CALLBACK (pad_added_cb), videodepay); -------------------------------------------------------------------------------------------------------------------------------------------------------- and the error i get: ~bash$ ./client_video_stream (client_video_stream:26694): GStreamer-CRITICAL **: gst_pad_link: assertion `GST_IS_PAD (srcpad)' failed ** ERROR:client_video_stream.c:148:main: assertion failed: (lres == GST_PAD_LINK_OK) Aborted ~bash $ ------------------------------------------------------------------------------------------------------------------------------------------------------ caps are: g_object_set (G_OBJECT (rtpsrc), "caps", gst_caps_new_simple("application/x-rtp", "media", G_TYPE_STRING, "video", "payload", G_TYPE_INT, "96", "clock-rate", G_TYPE_INT, "90000", "encoding-name",G_TYPE_STRING,"THEORA", "delivery-method",G_TYPE_STRING,"inline", NULL), NULL); -------------------------------------------------------------------------------------------------------------------------------------------------------- I will appreciate your help