It would be easier if you show your on_pad_added function, and if you tell exactly what error messages do you get when you run your application. To investigate the capabilities of a element you can use gst-inspect. On a terminal you can type for example: gst-inspect flump3dec it will give an complete specification of the flump3dec element. best regards, Katcipis <div class="gmail_quote">On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <<a href="mailto:basavarajp82@gmail.com">basavarajp82@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hello, Following is code which plays mp3 using playbin /* set up */ play = gst_element_factory_make ("playbin2", "play"); g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL); bus = gst_pipeline_get_bus (GST_PIPELINE (play)); // gst_bus_add_watch (bus, my_bus_callback, loop); gst_object_unref (bus); gst_element_set_state (play, GST_STATE_PLAYING); Following is code which does not play mp3. Please help me what all plugins we need to connect and how to find their capabilities /* Create gstreamer elements */ GstElement* pipeline = gst_pipeline_new ("audio-player"); GstElement* source = gst_element_factory_make ("filesrc", "file-source"); GstElement* demuxer = gst_element_factory_make ("mpegdemux2", "mpeg-demuxer"); GstElement* decoder = gst_element_factory_make ("flump3dec", "fluendo-decoder"); // GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin"); GstElement* conv = gst_element_factory_make ("audioconvert", "converter"); GstElement* sink = gst_element_factory_make ("autoaudiosink", "audio-output"); if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) { 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), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL); g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL); /* we add a message handler */ GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); /* we add all elements into the pipeline */ /* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */ gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decoder, conv, sink, NULL); /* we link the elements together */ /* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */ gst_element_link (source, demuxer); g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder); /* Set the pipeline to "playing" state*/ g_print ("Now playing: %s\n", argv[1]); gst_element_set_state (pipeline, GST_STATE_PLAYING); Thanks in advance,<div>Basavaraj</div> <div> <div> </div></div> ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. <a href="http://p.sf.net/sfu/bobj-july" target="_blank">http://p.sf.net/sfu/bobj-july</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> -- "Se você se perder na selva africana, não precisa se desesperar. Basta sentar em uma pedra e começar a instalar GNU/Linux em seu laptop. Em menos de 5 minutos aparecerá alguém pra discordar de sua escolha de distribuição, do particionamento, do gerenciador de janelas, do ambiente de desktop, do editor de textos..."