Hello, I can successfully capture and send unicast video and audio data from a v4l2 webcam and microphone via gst-rtsp RTSP server when requested by an RTSP client. However, I cannot seem to figure out how to send multicast video and audio data. I am using the test-launch example provided with gst-rtsp in both cases. However, case (2) below yeilds nothing when an RTSP client request arrives. What am I doing wrong? Thanks in advance. ;-) Case 1 (Unicast) /home/silentm/MessageNet/totem/gst-rtsp-0.10.5/examples/test-launch --gst-debug=255 "( v4l2src device=/dev/video0 ! ffmpegcolorspace ! video/x-raw-yuv,width=640,height=480,framerate=30/1 ! theoraenc quality=10 bitrate=6000 speed-level=2 ! rtptheorapay pt=96 name=pay0 alsasrc device="hw:0,0" ! audioconvert ! vorbisenc ! rtpvorbispay pt=97 name=pay1 )" Case 2 (Multicast?) /home/silentm/MessageNet/totem/gst-rtsp-0.10.5/examples/test-launch --gst-debug=255 "( gstrtpbin name=rtpbin v4l2src ! ffmpegcolorspace ! theoraenc ! rtptheorapay ! rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 ! udpsink port=5000 host=224.2.8.13 rtpbin.send_rtcp_src_0 ! udpsink port=5001 host=224.2.8.13 sync=false async=false udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 alsasrc device="hw:0,0" ! audioconvert ! vorbisenc ! rtpvorbispay ! rtpbin.send_rtp_sink_1 rtpbin.send_rtp_src_1 ! udpsink port=5002 host=224.2.8.13 rtpbin.send_rtcp_src_1 ! udpsink port=5003 host=224.2.8.13 sync=false async=false )" Best Regards, -- Rob Krakora Senior Software Engineer MessageNet Systems 101 East Carmel Dr. Suite 105 Carmel, IN 46032 (317)566-1677 Ext. 206 (317)663-0808 Fax