hi, Why did you use a fakesrc? If the stream come from a rtp session you should use one udpsrc and the specific rtp depay (rtpmp4vdepay probably), like: udpsrc ! rtpmp4vdepay! ffdec_mpeg4 ! ... Also, you have to set the caps in the udpsrc for reception. take a look at: <a href="http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/gst/rtp/README?revision=1.11&view=markup">http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/gst/rtp/README?revision=1.11&view=markup</a> It the the mpeg4 file is stored at a http place, you should use the gnomevfssrc, but it is look like you use it in windows, so try to use other http source, probably neonhttpsrc element: neonhttpsrc ! decodebin ! (one video sink) []s <div>On 3/21/07, Riccardo Corona <<a href="mailto:coronariccardo@gmail.com">coronariccardo@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;"> Hi, I'm trying to decode and visualize an mpeg4 stream but I can't understand the right gstElements that I must use; I think that I need a pipeline,a fakesrc, a ffdec_mpeg4 (I need it for decoding), a videoscale,a ffmpegcolorspace,  and directdrawsink (to draw images into a window in winxp). So, my question is: Do I need some other gstElement?Gst need some other info about the mpeg4 stream and, if so, what's the way to pass these info to my gst application? Sorry for my english and my bothering question, I'm new to gstreamer world! Best regards. -- Riccardo Corona ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV" target="_blank"> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV</a> _______________________________________________ gstreamer-devel mailing list <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:gstreamer-devel@lists.sourceforge.net"> gstreamer-devel@lists.sourceforge.net</a> <a onclick="return top.js.OpenExtLink(window,event,this)" href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel </a> </blockquote></div> -- Danilo Freire