You forgot to add vcolorspace to the bin that why you are getting those warnings. <div class="gmail_quote"> On Mon, May 2, 2011 at 7:56 PM, "Andreas Büttner" <<a href="mailto:Andreas.Buettner87@web.de">Andreas.Buettner87@web.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Hi, I know the topic was already discussed, but I always receive a mistake by using the following code(its nearly the code from a member here in the forum): ------------------code------------------ #include <gst/gst.h> #include <glib.h> #include <string.h> static GstElement *source, *demuxer, *vdqueue, *vdsink, *decvd, *vcolorspace; void on_pad_added (GstElement *element, GstPad *pad) { gchar *name; name = gst_pad_get_name (pad); g_debug ("A new pad %s was created\n", name); GstCaps *caps; GstStructure *str; caps = gst_pad_get_caps (pad); g_assert (caps != NULL); str = gst_caps_get_structure (caps, 0); g_assert (str != NULL); if (g_strrstr (gst_structure_get_name (str), "video")) { g_debug ("Linking video pad to dec_vd"); // Link it actually GstPad *targetsink = gst_element_get_pad (decvd, "sink"); g_assert (targetsink != NULL); gst_pad_link (pad, targetsink); gst_object_unref (targetsink); } gst_caps_unref (caps); } static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { GMainLoop *loop = (GMainLoop *) data; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_EOS: g_print ("End of stream\n"); g_main_loop_quit (loop); break; case GST_MESSAGE_ERROR: { gchar *debug; GError *error; gst_message_parse_error (msg, &error, &debug); g_printerr ("Error: %s (%s) \n", error->message, debug); g_free (debug); g_error_free (error); g_main_loop_quit (loop); break; } default: break; } return TRUE; } int main (int argc, char *argv[]) { GMainLoop *loop; GstElement *pipeline; GstBus *bus; /* Initialisation */ gst_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /* Check input arguments */ if (argc != 2) { g_printerr ("Usage: %s <AVI filename>\n", argv[0]); return -1; } /* Create gstreamer elements */ pipeline = gst_pipeline_new ("media-player"); source = gst_element_factory_make ("filesrc", "file-source"); demuxer = gst_element_factory_make ("avidemux", "avi-demuxer"); decvd = gst_element_factory_make ("decodebin", "video-decoder"); vcolorspace = gst_element_factory_make ("ffmpegcolorspace", "color-space"); vdsink = gst_element_factory_make ("autovideosink", "video-sink"); vdqueue = gst_element_factory_make ("queue", "video-queue"); if (!pipeline || !source || !demuxer || !decvd || !vdsink || !vdqueue) { g_printerr ("One element could not be created. Exiting.\n"); return -1; } /* Set up the pipeline */ /* we set the input filename to the source element */ g_object_set (G_OBJECT (source), "location", argv[1], NULL); /* we add a message handler */ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decvd, vdqueue, vdsink, NULL); gst_element_link (source, demuxer); gst_element_link (demuxer,vdqueue); gst_element_link (vdqueue, decvd); gst_element_link (decvd, vcolorspace); gst_element_link (vcolorspace, vdsink); g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decvd); //g_signal_connect (decvd, "pad-added", G_CALLBACK (on_pad_added), NULL); /* Set the pipeline to "playing" state*/ g_print ("Now playing: %s\n", argv[1]); gst_element_set_state (pipeline, GST_STATE_PLAYING); /* Iterate */ g_print ("Running...\n"); g_main_loop_run (loop); /* Out of the main loop, clean up nicely */ g_print ("Returned, stopping playback\n"); gst_element_set_state (pipeline, GST_STATE_NULL); g_print ("Deleting pipeline\n"); gst_object_unref (GST_OBJECT (pipeline)); return 0; } ------------------code-end-------------- I get the following mistake: (play-avi2:4453): GStreamer-WARNING **: Trying to connect elements that don't share a common ancestor: color-space and video-sink (play-avi2:4453): GStreamer-WARNING **: Trying to connect elements that don't share a common ancestor: color-space and video-sink Now playing: avi-test2.avi ** (play-avi2:4453): DEBUG: A new pad video_00 was created ** (play-avi2:4453): DEBUG: Linking video pad to dec_vd Running... Error: Interner Datenstromfehler. (gstavidemux.c(5134): gst_avi_demux_loop (): /GstPipeline:media-player/GstAviDemux:avi-demuxer: streaming stopped, reason not-linked) Returned, stopping playback Deleting pipeline I also tried the command-line tool: gst-launch filesrc location=avi-test2.avi ! avidemux name=demux demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! autovideosink On this way it is working, but with the code it is not possible to play the avi-file. I think the mistake is at the dynamic src-pad from the avidemuxer, but I have no idea how to fix it. Best regards, Andreas ___________________________________________________________ Schon gehört? <a href="http://WEB.DE" target="_blank">WEB.DE</a> hat einen genialen Phishing-Filter in die Toolbar eingebaut! <a href="http://produkte.web.de/go/toolbar" target="_blank">http://produkte.web.de/go/toolbar</a> _______________________________________________ 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> -- Regards, Sudarshan Bisht