Hi Emile, thank you very much for your clarification, I used the identity element and it's works, also i checked with wireshark and it give the same result, by the way, Im looking for some idea to measure the video transmission latency between multiple machines, I try to develop some benchmark, any suggestion is very helpful. For the moment I use zbar element to measure latency, but it does not work perfectly for what I'd like to do. thank you in advance. Simo <div class="gmail_quote">On Sun, Jun 3, 2012 at 10:27 AM, Emile Semmes [via GStreamer-devel] <<a href="/user/SendEmail.jtp?type=node&node=4655222&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi Simo, You can try attaching a data probe to the udpsrc or tcpclientsrc src pad with gst_pad_add_buffer_probe(). In the callback, you can keep track of the size of the incoming GstBuffer (GstBuffer->size) which is most likely the MTU size and get the timestamp using gst_util_get_timestamp(). With that you should be able to determine the incoming bandwidth. See <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-dataaccess.html#section-data-probe" rel="nofollow" link="external" target="_blank">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-dataaccess.html#section-data-probe</a> for an example on how to add a data probe. Another option is using an identity element and connecting a callback to the handoff signal it emits. You can place the identity element anywhere in your pipeline to determine the bandwidth between two elements. You might want to make sure it's synchronous so that your timestamps are valid. It should be but double-check with something like wireshark. Take care, Emile -- Emile Semmes Software Consultant e6 Group, LLC Office: <a href="tel:%28630%29%20376-0626" value="+16303760626" target="_blank">(630) 376-0626</a> <a href="http://www.e6group.com" target="_blank" rel="nofollow" link="external">www.e6group.com</a> Guru.com: <a href="http://www.guru.com/freelancers/e6group" rel="nofollow" link="external" target="_blank">http://www.guru.com/freelancers/e6group</a> On 6/2/2012 1:08 PM, simosimo wrote: <div><div class='shrinkable-quote'> > hello, > > Im doing some experimental test on GStreamer, and I get to the fourth > parameter of quality of service: the bandwidth. > can someone suggest me some techniques to measure the network bandwidth used > by my streaming pipeline. > In fact, I do performance measurements, therefore, I try to find the impact > of using multiple instance on the computer on the network that makes > transcoding , so I'd like to measure the bandwidth according to number of > instance supported by the computer (CPU). > > Thank you for your help. > > > Simo > > -- > View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/help-to-measure-bandwidth-tp4655169.html" rel="nofollow" link="external" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/help-to-measure-bandwidth-tp4655169.html</a></div> > Sent from the GStreamer-devel mailing list archive at Nabble.com. > _______________________________________________ > gstreamer-devel mailing list > <a href="http://user/SendEmail.jtp?type=node&node=4655176&i=0" rel="nofollow" link="external" target="_blank">[hidden email]</a> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="nofollow" link="external" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></div> _______________________________________________ gstreamer-devel mailing list <a href="http://user/SendEmail.jtp?type=node&node=4655176&i=1" rel="nofollow" link="external" target="_blank">[hidden email]</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="nofollow" link="external" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> <hr color="#cccccc" noshade size="1"> <div style="color:#444;font:12px tahoma,geneva,helvetica,arial,sans-serif"> <div style="font-weight:bold">If you reply to this email, your message will be added to the discussion below:</div> <a href="http://gstreamer-devel.966125.n4.nabble.com/help-to-measure-bandwidth-tp4655169p4655176.html" target="_blank" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/help-to-measure-bandwidth-tp4655169p4655176.html</a> </div> <div style="color:#666;font:11px tahoma,geneva,helvetica,arial,sans-serif;margin-top:.4em;line-height:1.5em"> To unsubscribe from help to measure bandwidth, <a href="" target="_blank" rel="nofollow" link="external">click here</a>. <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" rel="nofollow" style="font:9px serif" target="_blank" link="external">NAML</a> </div></blockquote></div> <hr align="left" width="300" /> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/help-to-measure-bandwidth-tp4655169p4655222.html">Re: help to measure bandwidth</a> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.