Probably you dont need a h264parse after qtdemux, since output from the qtdemux will be NAL units which can be directly fed to decoder. <div class="gmail_quote">On Tue, Mar 30, 2010 at 2:37 PM, ericcardmanNo3 <<a href="mailto:daniel.kuhne@yahoo.de">daniel.kuhne@yahoo.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> does anyone know how to successful link qtdemux to h264parse filter? I demux a mp4 file with qtdemux and the resulting video stream is with NAL,SPS,PPS. Therefore i thought i could link to h264parse and then let push data to my decoder plugin. I do: gst-launch -vvv filesrc location=r.mp4 ! qtdemux name=demux demux.video_00 ! q ueue!video/x-h264!h264parse! decodebin ! video/x-raw-yuv,format=\(fourcc\)YV12,w idth=320,height=240,framerate=\(fraction\)1/30 ! ffmpegcolorspace ! fbdevsink GST_DEBUG shows: Setting pipeline to PAUSED ... 0:00:00.793132250 1145 0x887d0 INFO qtdemux qtdemux.c:5383:qtdemux_parse_tree:<demux> timescale: 1000 0:00:00.794729875 1145 0x887d0 INFO qtdemux qtdemux.c:5384:qtdemux_parse_tree:<demux> duration: 152360 0:00:00.796545694 1145 0x887d0 INFO qtdemux qtdemux.c:4253:qtdemux_parse_trak:<demux> (null) Pipeline is PREROLLING ... 0:00:00.863135518 1145 0x887d0 WARN qtdemux qtdemux.c:4399:qtdemux_parse_trak:<demux> unknown version 00000000 0:00:00.864528541 1145 0x887d0 INFO qtdemux qtdemux.c:4518:qtdemux_parse_trak:<demux> (null) 0:00:00.938093392 1145 0x887d0 INFO qtdemux qtdemux.c:5410:qtdemux_parse_tree:<demux> (null) 0:00:00.942662521 1145 0x887d0 WARN qtdemux qtdemux.c:2448:gst_qtdemux_loop:<demux> error: streaming stopped, reason not-linked ERROR: from element /GstPipeline:pipeline0/GstQTDemux:demux: GStreamer encountered a general stream error. Additional debug info: qtdemux.c(2448): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:demux: streaming stopped, reason not-linked ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... /GstPipeline:pipeline0/GstQTDemux:demux.GstPad:audio_00: caps = NULL /GstPipeline:pipeline0/GstQTDemux:demux.GstPad:video_00: caps = NULL Freeing pipeline ... Does anyone know what to do here? Thx, Daniel- -- View this message in context: <a href="http://n4.nabble.com/link-qtdemux-to-h264parse-tp1744923p1744923.html" target="_blank">http://n4.nabble.com/link-qtdemux-to-h264parse-tp1744923p1744923.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Download Intel&#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</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>