Thanks for your reply! I followed the instructions in the link you sent me, but I still got an error. If I do this: gst-launch v4l2src ! video/x-raw-yuv,width=320,height=240,framerate=\(fraction\)5/1 ! ffmpegcolorspace ! jpegenc ! multipartmux ! tcpserversink host=192.168.2.1 port=5000 Then the error is: (gst-launch-0.10:8222): GLib-WARNING **: g_set_prgname() called multiple times Setting pipeline to PAUSED ... ERROR: Pipeline doesn't want to pause. ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot identify device '/dev/video0'. Additional debug info: v4l2_calls.c(482): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: system error: No such file or directory Setting pipeline to NULL ... Freeing pipeline ... So I guess video/x-raw-yuv,width=320,height=240 should be a file in my current folder so I change it to 1.MPG that is a mpeg file in my current folder. Then the error is: (gst-launch-0.10:8227): GLib-WARNING **: g_set_prgname() called multiple times WARNING: erroneous pipeline: link without source element I am totally confused....Just started learning stream a few days ago and I am not familiar with Linux... So what do you think I should revise in the above command gst-launch? Would you please give me some specific suggestion? Thank you very much! I am really a "newbie" in this area :) Tom <div class="gmail_quote">On Thu, Feb 17, 2011 at 5:07 AM, Thabelo Mmbengeni <<a href="mailto:thabelo@gmail.com">thabelo@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> I agree rtp or srtsp to maintain data streaming.<div><div></div><div class="h5"> <div class="gmail_quote">On Thu, Feb 17, 2011 at 1:00 PM, Luis de Bethencourt <<a href="mailto:luis@debethencourt.com" target="_blank">luis@debethencourt.com</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><div></div><div>On Thu, Feb 17, 2011 at 8:49 AM, Marc Leeman <<a href="mailto:marc.leeman@gmail.com" target="_blank">marc.leeman@gmail.com</a>> wrote: >> I just started learning gstreamer this morning and I found it might be >> feasible for me to do my project: > > <a href="http://lmgtfy.com/?q=stream+file+with+gstreamer" target="_blank">http://lmgtfy.com/?q=stream+file+with+gstreamer</a> > >> For example, the rate of I-frame, B-frame, P-frame, etc. > > <a href="http://lmgtfy.com/?q=transcoding+gstreamer" target="_blank">http://lmgtfy.com/?q=transcoding+gstreamer</a> > > -- > greetz, marc > There is no likelihood man can ever tap the power of the atom. > -- Robert Millikan, Nobel Prize in Physics, 1923 > crichton 2.6.26 #1 PREEMPT Tue Jul 29 21:17:59 CDT 2008 GNU/Linux </div></div><a href="http://wiki.laptop.org/go/GStreamer#Doing_live_streaming_video_from_an_xo" target="_blank">http://wiki.laptop.org/go/GStreamer#Doing_live_streaming_video_from_an_xo</a> It would be better to use rtp... but this link will get you a feel for streaming. Luis _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">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></div>-- Regards Thabelo Mmbengeni (TMT Services Cape Town HO, Engineering dep) _______________________________________________ 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>