Hi Tim, Thank you very much for your information. After installing mad plugin(gstreamer-ugly plugins), gst_element_seek is success. But forward seek is fine but backward is not happening instantaneous, meaning if I seek backward for say 10 sec , I dont hear anything for 10sec & then it plays from the new seek position (i.e., current_pos - 10 sec). But however I don't see this problem in my another setup. Do you need any additional information. Thanks , Satish P <div class="gmail_quote">On Wed, Jun 8, 2011 at 1:59 PM, Tim-Philipp Müller <<a href="mailto:t.i.m@zen.co.uk">t.i.m@zen.co.uk</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On Wed, 2011-06-08 at 12:53 +0530, satish pattar wrote: > I downloaded gst123 & installed in my Ubuntu system. then I tried to > play a mp3 file. it plays fine but > > seek is always failing (gst_element_seek is returning false) > > The same thing works in another Linux box. > > What could be the problem ? </div>Hard to say without more information. Does seeking work with the same file(s) in totem or rhythmbox? Maybe you need to install the mp3parse/mpegaudioparse elements because your mp3 decoder doesn't support seeking? Depending on your version of the GStreamer stack, these might be in gst-plugins-bad, gst-plugins-ugly or gst-plugins-good. Or you could try installing the 'mad' mp3 decoder. Cheers -Tim _______________________________________________ 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> -- Thanks & Regards, Satish Pattar