You always want to check the return result from any of the link calls. Also, to link the decodebin you have to listen for the pad-added (or is it new-decoded-pad, I can't recall) and link when it's available. It won't be available until the decodebin has setup the decoders and such. -Tim <div class="gmail_quote">On Wed, Jan 5, 2011 at 1:50 PM, Nicolas <<a href="mailto:c.r.n.a@wanadoo.fr">c.r.n.a@wanadoo.fr</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi, In fact, i made a new pipeline just for testing and my problem is, i don't know what to link together ! In the code below nothing append, no message (gst-launch sample work perfectly). #include <gst/gst.h> // Build with gcc test.c `pkg-config --cflags --libs gstreamer-0.10 glib-2.0` -o test // gst-launch filesrc location="/home/niko/jour1.avi" ! decodebin ! videoscale ! capsfilter caps=video/x-raw-yuv,width=800,height=600,framerate=30/1 ! ffmpegcolorspace ! ximagesink int main (int argc, char *argv[]) { GMainLoop *loop; GstElement *pipeline, *source, *decode, *scale, *filter, *color, *sink; GstCaps *caps; gst_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); pipeline = gst_pipeline_new ("test_pipeline"); source = gst_element_factory_make ("filesrc", "source"); g_object_set ((GObject*) source, "location", "/home/niko/jour1.avi", NULL); decode = gst_element_factory_make ("decodebin", "decode"); scale = gst_element_factory_make ("videoscale", "scale"); <div class="im"> filter = gst_element_factory_make ("capsfilter", "filter"); caps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'), "width", </div>G_TYPE_INT, 800, "height", G_TYPE_INT, 600, "framerate", GST_TYPE_FRACTION, 30, 1, NULL); g_object_set ((GObject*) filter, "caps", caps, NULL); gst_caps_unref(caps); color = gst_element_factory_make ("ffmpegcolorspace", "color"); sink = gst_element_factory_make ("ximagesink", "output"); gst_bin_add_many (GST_BIN (pipeline), source, scale, filter, color, sink, NULL); gst_element_link_many(source, scale, filter, color, sink, NULL); <div class="im"> gst_element_set_state (pipeline, GST_STATE_PLAYING); </div> g_main_loop_run (loop); gst_element_set_state (pipeline, GST_STATE_NULL); gst_object_unref (GST_OBJECT (pipeline)); return 0; } Thanks in advance for you help. <div><div></div><div class="h5">Nicolas. ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption <a href="http://p.sf.net/sfu/oracle-sfdevnl" target="_blank">http://p.sf.net/sfu/oracle-sfdevnl</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> </div></div></blockquote></div>