<div dir="ltr">The 'not-negotiated' error means that there is a caps problem. Enable logging and look for the negotiation failure. On Linux, export GST_DEBUG=*:3 to get started. That will give you the names of relevant filters. You probably want to look at GST_ELEMENT. export GST_DEBUG=*:3,GST_ELEMENT:4 for example. This will give you a logging of the step-by-step connection of the pads so you can quickly determine where the failure is. </div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Feb 26, 2014 at 5:59 AM, d <<a href="mailto:dudi017@gmail.com" target="_blank">dudi017@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi, I have a pipeline that work fine if I write the video to a file. but when I try to display the video on the screen, I keep get this error: Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstFileSrc:filesrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2633): gst_base_src_loop (): /GstPipeline:pipeline0/GstFileSrc:filesrc0: streaming task paused, reason not-negotiated (-4) ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ... this is the pipeline: gst-launch-0.10 filesrc location=video.pcap ! pcapparse src-port=58694 ! "application/x-rtp, payload=(int)96, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" ! rtph264depay ! "video/x-h264, width=320, height=240, framerate=(fraction)30/1" ! autovideosink am I doing something wrong here? thanks -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/cant-display-the-video-tp4665536.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/cant-display-the-video-tp4665536.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ 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> </div>