Hi Dhanraj, in some filter element, _chain function is called when buffer is received by the element. _loop function can be used inside a task (behind a thread) to process some blocking activities without blocking peer element. Have a look at queue element (from core elements) as example. -- Yann Gilquin <a href="http://www.purplelabs.com" target="_blank">www.purplelabs.com</a> <div class="gmail_quote">2008/11/17 Dhanraj Birader <<a href="mailto:dhanraj.b@allaboutif.com" target="_blank">dhanraj.b@allaboutif.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi, what is the difference between chain funtion and loop function. thanks in advance. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">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>