Have you tried GST_DEBUG=stuff:5,more stuff:5? What does that say? How can you tell working from not working? Shouldn't the width and height be ints? <div class="gmail_quote">On Thu, Mar 7, 2013 at 10:20 AM, Gary Thomas <<a href="mailto:gary@mlbassoc.com" target="_blank">gary@mlbassoc.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Sorry if this is an old record, but I'm getting nowhere... Why does this pipeline work: gst-launch -e -vvv shmsrc socket-path=/tmp/shm-stream.sock \ ! "application/x-rtp, sampling=(string)YCbCr-4:2:2, width=(string)720, height=(string)480, payload=(int)96" \ ! rtpvrawdepay \ ! fakesink and this one does not? gst-launch -e -vvv shmsrc socket-path=/tmp/shm-stream.sock \ ! "application/x-rtp, sampling=(string)YCbCr-4:2:2, width=(string)720, height=(string)480, payload=(int)96" \ ! rtpvrawdepay \ ! ffenc_mpeg4 \ ! fakesink Note: I only added the mpeg4 encoder element which is compatible and there are no errors/complaints. The elements all have compatible [default] caps and it should just work. If I trade the 'shmsrc'+'rtpvrawdepay' for something like 'videotestsrc', both can work. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">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>