Thanks a lot for your help. That was the key to getting it to run. I now have a working rtsp-server pipe thus:<div><br></div><div>./test-launch "( udpsrc port=5000 caps=\"application/x-rtp, media=\(string\)video, clock-rate=\(int\)90000, encoding-name=\(string\)H264, payload=\(int\)96, ssrc=\(guint\)2396357661, clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439\" ! rtph264depay ! ffdec_h264 ! ffmpegcolorspace ! videoscale ! x264enc ! rtph264pay name=pay0 pt=96 sync=false )"</div> <div><br></div><div>Problem now is that there is a 3 - 4 second latency when playing using that pipeline and playing the resulting video through vlc or quicktime.</div><div><br></div><div>My question: How do I find what is causing the delay and what can I do to reduce the delay?</div> <div><br></div><div>Thanks</div><div>Morris<br><br><div class="gmail_quote">On Mon, Feb 28, 2011 at 2:33 AM, Marco Ballesio <span dir="ltr"><<a href="mailto:gibrovacco@gmail.com">gibrovacco@gmail.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi,<br> <div class="im"><br> On Mon, Feb 28, 2011 at 3:05 AM, Morris Ford <<a href="mailto:morrishford@gmail.com">morrishford@gmail.com</a>> wrote:<br> > I am working on receiving an udpsrc stream and publishing it as an rtsp<br> > stream. This gst-launch string works just fine to receive the stream:<br> > gst-launch-0.10 -v udpsrc port=5000 caps="application/x-rtp,<br> > media=\(string\)video, clock-rate=\(int\)90000,<br> > encoding-name=\(string\)H264, payload=\(int\)96, ssrc=\(guint\)2396357661,<br> > clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439" ! rtph264depay !<br> > decodebin ! ffmpegcolorspace ! videoscale ! xvimagesink sync=false<br> > but when I try to take that pipeline and put it into a test-launch, I get<br> > complaints about not being able to set the caps on udpsrc to<br> > application/x-rtp.<br> > Like this:<br> > ./test-launch "( udpsrc port=5000 caps="application/x-rtp,<br> > media=\(string\)video, clock-rate=\(int\)90000,<br> <br> </div>It's just about bash syntax. The way you're using the " make bash<br> thinking you're passing test-launch a first argument like this:<br> <br> ( udpsrc port=5000 caps=<br> <br> concatenated to:<br> <br> application/x-rtp,<br> <br> and a second argument like:<br> <br> media=\(string\)video,<br> <br> useless to say this is not what you should pass to the test-launch<br> command. I suggest you to try replacing the outmost pair of " with '<br> or the innermost ones with \"<br> <br> Regards<br> <div class="im"><br> > encoding-name=\(string\)H264, payload=\(int\)96, ssrc=\(guint\)2396357661,<br> > clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439" ! rtph264depay !<br> > decodebin ! ffmpegcolorspace ! videoscale ! x264enc ! rtph264pay name-pay0<br> > pt=96 )"<br> > ** (lt-test-launch:20772): CRITICAL **: could not parse launch syntax ((<br> > udpsrc port=5000 caps=application/x-rtp,): could not set property "caps" in<br> > element "udpsrc0" to "application/x-rtp,"<br> > ** (lt-test-launch:20772): CRITICAL **: could not create element<br> > I could not find any examples of udpsrc in a test-launch line or udpsrc in a<br> > gst-rtsp-server 'c' program so I am not at all sure if what I am trying to<br> > do is valid.<br> > Morris<br> </div>> _______________________________________________<br> > gstreamer-devel mailing list<br> > <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> ><br> ><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> </blockquote></div><br></div>