Hi, I managed this issue by installing the UGLY plugins. However, I don't know if this is the proper way to solve my issue. Now I can get the RTSP stream (both from VLC and Live555 RTSP servers) but the video framerate is lower than the original and not stable. I have checked that all RTP packets are received (sequence numbers are ok) and I get neither error nor warning messages from Gstreamer, so I don't know what is happening and how I could get a smooth video playback in RTSP streaming (the same video played locally works smoothly). As said before, I have these problems since I updated Gstreamer from 0.8 to 0.10, so I don't know if there is any related issue with these problems or if I'm missing something. Anyway, I would like anyone to help me getting things working, either downgrading to 0.8 (I don't know where to find this version) or managing with the current 0.10 version I've just installed. Thank you all, Javi <div class="gmail_quote">2009/3/4 Javier Gálvez Guerrero <<a href="mailto:javier.galvez.guerrero@gmail.com">javier.galvez.guerrero@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;"> Hi there, I was using the Gstreamer framework (version 0.8) to get some tests. I used Gstreamer as client and VLC (0.9.4) as RTSP server and it worked smoothly. The problem has arised when updating Gstreamer to 0.10.21. When I launch "gst-launch-0.10 playbin uri=rtsp://IP:PORT/content it never starts playing the media. Using VLC as a client works ok. I can see with Wireshark the RTSP message exchange (PAUSE and then TEARDOWN) and I get these error messages where launching Gstreamer: Estableciendo el flujo a PAUSADO ... (PAUSED) El flujo es en vivo y no necesita PRECACHEADO ... (PRECACHED) Estableciendo el flujo para REPRODUCCIÓN ... (PLAY) New clock: GstSystemClock ERROR: desde el elemento /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0: Internal GStreamer error: negotiation problem. Please file a bug at <a href="http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer" target="_blank">http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer</a>. Información adicional de depurado: gstffmpegdec.c(2339): gst_ffmpegdec_chain (): /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0: ffdec_mpegvideo: input format was not set before data start Execution ended after 887032082 ns. Estableciendo el flujo a PAUSADO ... Estableciendo pipeline a READY... Estableciendo pipeline a NULL... LIBERANDO pipeline ... (FREEING) I would like to know how I can solve this issue and, in case the only solution is downgrading to gstreamer 0.8, could anybody tell me where can I find it? By the way, as you may have noted, I am a newbie in the Gstreamer framework, but I am quite interested in succeedin using it. Any help would be much appreciated. Thank you, Javi </blockquote></div>