<div dir="ltr">Hi, Jens:     Thanks for your reply but it doesn't work. Rtspsrc isn't like http-src element, the video & audio stream are separated in it while not been separated in any demux element. So that means there are 2 streams coming from rtspsrc and each of them should be connected to a decodebin.     I tried the command you mentioned, the result is - nothing happened. The output is: ============================== eric@eric-desktop:~$ gst-launch rtspsrc location="rtsp://localhost/test.mp4" protocols=1 ! decodebin name=d ! queue ! ffmpegcolorspace ! xvimagesink  d. ! queue ! audioconvert ! alsasink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock ============================== Eric Zhang <div class="gmail_quote"> 2008/9/8 Jens Persson <<a href="mailto:xerxes2@gmail.com">xerxes2@gmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hmm, try this instead: gst-launch rtspsrc location="rtsp://localhost/test.mp4" protocols=1 ! decodebin name=d ! queue ! ffmpegcolorspace ! xvimagesink  d. ! queue ! audioconvert ! alsasink Greets Jens <div><div></div><div class="Wj3C7c"> Eric Zhang wrote: > Hi, gstreamer: > >     Recently, I wanna play movies from a rtsp server. I installed > DarwinStreamServer on my laptop and use command line: > >     gst-launch playbin uri="rtsp://localhost/test.mp4" > >     It works well. But if I use decodebin instead of playbin, error > occurs: > >     gst-launch rtspsrc location="rtsp://localhost/test.mp4" > protocols=1 name=d d. ! decodebin ! queue ! ffmpegcolorspace ! > xvimagesink d. ! decodebin ! queue ! audioconvert ! alsasink > >     The error message is: > > ========================= > Setting pipeline to PAUSED ... > Pipeline is live and does not need PREROLL ... > Setting pipeline to PLAYING ... > New clock: GstSystemClock > ERROR: from element /pipeline0/d/udpsrc0: Internal data flow error. > Additional debug info: > gstbasesrc.c(2240): gst_base_src_loop (): /pipeline0/d/udpsrc0: > streaming task paused, reason not-linked (-1) > Execution ended after 117342031 ns. > Setting pipeline to PAUSED ... > Setting pipeline to READY ... > Setting pipeline to NULL ... > FREEING pipeline ... > ================================== > >     I noticed sometimes decodebin works but mostly it fails. What > tricks does playbin do to make it work? I skimed the source codes of > playbin and found out that it also use decodebin inside. > >     Thanks a lot. I really appreciate your suggestions. > > Eric Zhang </div></div>> ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > 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">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> > ------------------------------------------------------------------------- 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">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> </div>