Hi Sebastian, Which watchdog element (or pad probe) would you suggest, that would induce the least latency (or none, ideally)? Here are my working pipelines... Sending side: gst-launch-1.0 -v videotestsrc ! jpegenc ! rtpjpegpay ! udpsink host=192.168.1.100 port=5005 Receiving end (in my application): GstElement* pipeline = gst_pipeline_new ("pipeline"); GstElement* videosrc = gst_element_factory_make ("udpsrc", NULL); GstCaps *udp_caps = gst_caps_from_string ("application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, payload=(int)26"); g_object_set (videosrc, "port", 5005, "caps", udp_caps, NULL); GstElement* rtpjpegdepay = gst_element_factory_make("rtpjpegdepay", NULL); GstElement* decodebin = gst_element_factory_make("jpegdec", NULL); GstElement* videosink = gst_element_factory_make ("caopengllayersink", NULL); gst_bin_add_many (GST_BIN (pipeline), videosrc, rtpjpegdepay, decodebin, videosink, NULL); gboolean phase1_ok = gst_element_link_filtered(videosrc, rtpjpegdepay, udp_caps); gst_caps_unref(udp_caps); gboolean phase2_ok = gst_element_link(rtpjpegdepay,decodebin); gboolean phase3_ok = gst_element_link(decodebin,videosink); Many thanks! Alexandre Le 2016-11-14 04:58, Sebastian Dröge-3 [via GStreamer-devel] a écrit : <div class='shrinkable-quote'> > On Sun, 2016-11-13 at 16:59 -0800, skryabin wrote: > >> Hello, >> >> I have an RTP stream UDP client/server setup, and the server side > (receiving >> end of the stream) is a Cocoa Mac OS X application. >> >> I would like to check, using gstreamer, if the camera is currently > sending >> data. >> >> Using: >> >> ret = gst_element_set_state(pipeline, GST_STATE_PLAYING); >> >> I always get GST_STATE_CHANGE_ASYNC, whether or not the client is > sending >> the RTP stream or not. >> >> Is there any way to perform this kind of validation, using > gstreamer? It depends on your exact pipeline. But you could always do > something > like adding a watchdog element somewhere in the pipeline, or a pad > probe, to check if data is flowing regularly there. > > -- > Sebastian Dröge, Centricular Ltd · <a href="http://www.centricular.com" target="_top" rel="nofollow" link="external">http://www.centricular.com</a> [1] > _______________________________________________ > gstreamer-devel mailing list > [hidden email] [2] > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_top" rel="nofollow" link="external">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> [3] > > SIGNATURE.ASC (981 bytes) Download Attachment [4] > > ------------------------- > > If you reply to this email, your message will be added to the > discussion below: > <a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-check-from-server-side-if-RTP-stream-is-coming-in-on-UDP-port-tp4680662p4680672.html" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/How-to-check-from-server-side-if-RTP-stream-is-coming-in-on-UDP-port-tp4680662p4680672.html</a> > [5] > To unsubscribe from How to check from server side if RTP stream is > coming in on UDP port?, click here [6]. > NAML [7] > > Links: > ------ > [1] <a href="http://www.centricular.com" target="_top" rel="nofollow" link="external">http://www.centricular.com</a> > [2] > <a href="http://webmail.vovan.ca/user/SendEmail.jtp?type=node&node=4680672&i=0" target="_top" rel="nofollow" link="external">http://webmail.vovan.ca/user/SendEmail.jtp?type=node&node=4680672&i=0</a> > [3] <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_top" rel="nofollow" link="external">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > [4] > <a href="http://gstreamer-devel.966125.n4.nabble.com/attachment/4680672/0/signature.asc" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/attachment/4680672/0/signature.asc</a> > [5] > <a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-check-from-server-side-if-RTP-stream-is-coming-in-on-UDP-port-tp4680662p4680672.html" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/How-to-check-from-server-side-if-RTP-stream-is-coming-in-on-UDP-port-tp4680662p4680672.html</a> > [6] > <a href="" target="_top" rel="nofollow" link="external"> [7] > <a href="http://gstreamer-devel.966125.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml</a></div> <hr align="left" width="300" /> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-check-from-server-side-if-RTP-stream-is-coming-in-on-UDP-port-tp4680662p4680676.html">Re: How to check from server side if RTP stream is coming in on UDP port?</a> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.