Thanks, Florent. FPS is meaningful for me to see when cpu is not able keep it at maximum, I also need a way to measure how much performance I gain with hardware codecs. I used handoff event as you suggested and I had to split the stream into two with tee and feed one to fakesink. So it works :) Then I need to measure what do I get with XV, since colorspace conversions and scaling can be done with it. From here perhaps I can measure cpu usage, but to use FPS wouldn't be fair, because I can't go with gstreamer beyond xvimagesink. I will study what I can do with QoS events. -- Aarto <div class="gmail_quote">On Thu, Apr 16, 2009 at 4:27 AM, Florent <<a href="mailto:fthiery@gmail.com">fthiery@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div><div></div><div class="h5">Hello > I develop a benchmark and performance test application based on gstreamer. > Is there a plugin or a way to display/output real fps from the playback. Any > other meaningful metric that can be used for evaluating performance is > useful also. Thanks. </div></div>You could use identity (which you can insert anywhere in your pipeline), and connect the signals "handoff": * wo a callback incrementing a counter you reset every second, which will give you second-scale fps average measurement * to a callback measuring difference beween consecutive timestamps, which will give you instantaneous fps measure (fps will be 1/difference) If you are only interested in pure display/playback performance measurement, you could take a look at QoS events' timestamps emitted from sinks (see gstreamer/docs/design/part-qos.txt). For memory/cpu usage, you could use standard system calls or /proc parsings. I hope this helps. Maybe there are better ways to do this... Can you elaborate on the kind of performance you would like to measure ? Florent ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. <a href="http://p.sf.net/sfu/p" target="_blank">http://p.sf.net/sfu/p</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>