Hi Nicolai, actually as I said I already did it and ir didn't work. Here is my original message "I tryed to link avidemux - decodebin with on-pad event, and decodebin - queue as well. It didn't work." I post the code: // pad-event for avidemux static void on_pad_added (GstElement *element, GstPad *pad, gpointer data) { g_debug ("Signal: pad-added"); GstCaps *caps; GstStructure *str; GstElement *queue = (GstElement*)data; caps = gst_pad_get_caps (pad); g_assert (caps != NULL); str = gst_caps_get_structure (caps, 0); g_assert (str != NULL); cout << "enlazando enlazara pads" << endl << endl; 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 (queue, "sink"); //GstCaps *capsV = gst_caps_from_string("video/x-raw-yuv;video/x-raw-rgb"); //GstPad *targetsink = gst_element_get_compatible_pad(data,pad,capsV); cout << "enlazando cola de video" << endl << endl; g_assert (targetsink != NULL); gst_pad_link (pad, targetsink); gst_object_unref (targetsink); } if (g_strrstr (gst_structure_get_name (str), "audio")) { g_debug ("Linking audio pad to dec_ad"); // Link it actually //GstPad *targetsink = gst_element_get_pad (decad, "sink"); GstPad *targetsink = gst_element_get_pad (queue, "sink"); cout << "enlazando cola de audio" << endl << endl; g_assert (targetsink != NULL); gst_pad_link (pad, targetsink); gst_object_unref (targetsink); } gst_caps_unref (caps); //gst_caps_unref (capsV); } // pad event for decodebin2 static void cb_pad_added (GstElement *element, GstPad *pad, gpointer data) { GstPad *sinkpad = NULL; GstElement * queue = (GstElement *) data; /* Ahora linkeo el pad de comp con sink pad */ g_print ("Dynamic pad created, linking queue\n"); sinkpad = gst_element_get_static_pad (queue, "sink"); gst_pad_link (pad, sinkpad); gst_object_unref (sinkpad); } <div class="gmail_quote">2012/1/5 Nicolai Hess <<a href="mailto:nicolaihess@web.de">nicolaihess@web.de</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div class="gmail_quote">2012/1/5 Rossana Guerra <<a href="mailto:guerra.rossana@gmail.com" target="_blank">guerra.rossana@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <div><div class="h5"> Hi I am trying to play an avi file, for some reasons I don't want to do it with a playbin. The fact is I had an avidemux and a mad decoder but not every avi file can play. Then I replaced it for the following pipeline, to get the most codecs. decodebin ----- queue ------ audioconvert ---- audioresample ------ autoaudiosink filescr --- avidemux --- decodebin ----- queue ------ ffmpegcolorspace ----- videoscale ----autovideosink I tryed to link avidemux - decodebin with on-pad event, and decodebin - queue as well. It didn't work. I tryed to link avidemux - decodebin with the following code, but it didn't work either. // demuxer avidemux's name // decvd a decodebin name for video, decad a decodebin name for audio. GstPad *targetsrc = gst_element_get_pad(demuxer, "video_%02"); GstPad *targetsrc2 = gst_element_get_pad(demuxer, "audio_%02"); GstPad *padV = gst_element_get_static_pad(decvd,"sink"); GstPad *padA = gst_element_get_static_pad(decad,"sink"); gst_pad_link (targetsrc,padV); gst_pad_link (targetsrc2,padA); Any suggestion? Thanks a lot. Rossana </div></div>_______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">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> I think this is the same error I wrote about in your last program. You can not get the srcpads from the avidemux, as they are dynamic pads. At this point, the demuxer can not know if there are audio and/or video streams at all. You have to create a pad-added callback for the demuxer as well. nicolai _______________________________________________ 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>