I tried various combinations - this one runs but does not change latency (w/o ffmpegcolorspace ! videoscale):<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 ! x264enc ! rtph264pay name=pay0 pt=96 sync=false )"<br> <br></div><div>This one won't run (w/o the whole decode/encode sequence):</div><div><br></div><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 ! rtph264pay name=pay0 pt=96 sync=false )"</div> <div><br></div><div>** (lt-test-launch:4413): WARNING **: ignoring stream 0 without media type</div><div><br></div><div>I suppose I need some caps or something between the depay and pay.</div><div><br></div><div>Morris</div> <div><br></div><div class="gmail_quote">On Mon, Feb 28, 2011 at 11:42 AM, Mailing List SVR <span dir="ltr"><<a href="mailto:lists@svrinformatica.it">lists@svrinformatica.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <br> <br> Il giorno lun, 28/02/2011 alle 11.14 -0500, Morris Ford ha scritto:<br> <div class="im">> Thanks a lot for your help. That was the key to getting it to run. I<br> > now have a working rtsp-server pipe thus:<br> ><br> ><br> > ./test-launch "( udpsrc port=5000 caps=\"application/x-rtp, media=<br> > \(string\)video, clock-rate=\(int\)90000, encoding-name=\(string<br> > \)H264, payload=\(int\)96, ssrc=\(guint\)2396357661, clock-base=<br> > \(guint\)2297066863, seqnum-base=\(guint\)49439\" ! rtph264depay !<br> > ffdec_h264 ! ffmpegcolorspace ! videoscale ! x264enc ! rtph264pay<br> > name=pay0 pt=96 sync=false )"<br> ><br> <br> </div>try removing the reencoding part "ffdec_h264 ! ffmpegcolorspace !<br> videoscale ! x264enc !"<br> <br> ><br> <div class="im">> Problem now is that there is a 3 - 4 second latency when playing using<br> > that pipeline and playing the resulting video through vlc or<br> > quicktime.<br> <br> </div>in vlc use --rtsp-caching=100<br> <div><div></div><div class="h5"><br> ><br> ><br> > My question: How do I find what is causing the delay and what can I do<br> > to reduce the delay?<br> ><br> ><br> > Thanks<br> > Morris<br> ><br> > On Mon, Feb 28, 2011 at 2:33 AM, Marco Ballesio <<a href="mailto:gibrovacco@gmail.com">gibrovacco@gmail.com</a>><br> > wrote:<br> > Hi,<br> ><br> > On Mon, Feb 28, 2011 at 3:05 AM, Morris Ford<br> > <<a href="mailto:morrishford@gmail.com">morrishford@gmail.com</a>> wrote:<br> > > I am working on receiving an udpsrc stream and publishing it<br> > as an rtsp<br> > > stream. This gst-launch string works just fine to receive<br> > 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=<br> > \(guint\)2396357661,<br> > > clock-base=\(guint\)2297066863, seqnum-base=\(guint<br> > \)49439" ! rtph264depay !<br> > > decodebin ! ffmpegcolorspace ! videoscale ! xvimagesink<br> > sync=false<br> > > but when I try to take that pipeline and put it into a<br> > 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> ><br> > It's just about bash syntax. The way you're using the " make<br> > bash<br> > thinking you're passing test-launch a first argument like<br> > 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<br> > test-launch<br> > command. I suggest you to try replacing the outmost pair of "<br> > with '<br> > or the innermost ones with \"<br> ><br> > Regards<br> ><br> > > encoding-name=\(string\)H264, payload=\(int\)96, ssrc=<br> > \(guint\)2396357661,<br> > > clock-base=\(guint\)2297066863, seqnum-base=\(guint<br> > \)49439" ! rtph264depay !<br> > > decodebin ! ffmpegcolorspace ! videoscale ! x264enc !<br> > rtph264pay name-pay0<br> > > pt=96 )"<br> > > ** (lt-test-launch:20772): CRITICAL **: could not parse<br> > launch syntax ((<br> > > udpsrc port=5000 caps=application/x-rtp,): could not set<br> > property "caps" in<br> > > element "udpsrc0" to "application/x-rtp,"<br> > > ** (lt-test-launch:20772): CRITICAL **: could not create<br> > element<br> > > I could not find any examples of udpsrc in a test-launch<br> > line or udpsrc in a<br> > > gst-rtsp-server 'c' program so I am not at all sure if what<br> > I am trying to<br> > > do is valid.<br> > > Morris<br> ><br> > > _______________________________________________<br> > > gstreamer-devel mailing list<br> > > <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br> > ><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> ><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> <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> </div></div></blockquote></div><br></div>