<div dir="ltr">It looks like your opencv plugin is not installed. Search the archive (or google) for installing plugins. You can use gst-inspect facedetect to verify that it is installed properly. If gst-inspect can't find it, you can't use it. </div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Jun 26, 2013 at 2:22 PM, nickgzzjr <<a href="mailto:nickgzzjr@hotmail.com" target="_blank">nickgzzjr@hotmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I tried installing different onces including gstreamer1.0 from here <<a href="https://launchpad.net/~gstreamer-developers/+archive/ppa?field.series_filter=precise" target="_blank">https://launchpad.net/~gstreamer-developers/+archive/ppa?field.series_filter=precise</a>> . But no luck it says No such element or plugin... So then I did the uninstalled version of gstreamer from the git repository. And it actually compiled the opencv plugin file but I get this error: # gst-inspect facedetect (lt-gst-plugin-scanner:11001): GStreamer-WARNING **: Failed to load plugin '/root/gst/master/gst-plugins-bad/ext/opencv/.libs/libgstopencv.so': /root/gst/master/gst-plugins-bad/ext/opencv/.libs/libgstopencv.so: undefined symbol: _ZN2cv3Mat10deallocateEv No such element or plugin 'facedetect' Any idea what is going on? -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-with-openCV-plugins-tp4660738p4660747.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-with-openCV-plugins-tp4660738p4660747.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>