Thank you, that worked. Here is the script for reference for others. The syntax makes sense because it follows the syntax for a 'T'. #!/bin/sh #export GST_DEBUG=udpsrc:4,rtspsrc:4,*:3 gst-launch -v rtspsrc location=rtsp://someserver:/somefile.sdp name=src \ src. ! queue ! rtph264depay ! mux. \ src. ! queue ! rtpmp4gdepay ! mux. \ mpegtsmux name=mux ! udpsink host=$1 port=$2 <div class="gmail_quote">On Fri, Feb 15, 2013 at 11:57 AM, enthusiastic geek <<a href="mailto:enthusiasticgeek@gmail.com" target="_blank">enthusiasticgeek@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I haven't used this specific bin but could you try the syntax below to mux audio and video together by replacing mux with mpegtsmux and other bins. (if you provide some pipeline, even if incorrect, as a reference, you are likely to receive more and quicker help) gst-launch-1.0 videotestsrc num-buffers=250 \ ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \ ! xvidenc ! queue ! mux. \ audiotestsrc num-buffers=440 ! audioconvert ! 'audio/x-raw,rate=44100,channels=2' \ ! lame ! queue ! mux. \ avimux name=mux ! filesink location=test.avi -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/gst-launch-use-question-tp4658556p4658560.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/gst-launch-use-question-tp4658556p4658560.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div>