thanks fot the hints Wim. Im going to read more before posting now. <div class="gmail_quote">On Thu, May 7, 2009 at 12:19 PM, Wim Taymans <<a href="mailto:wim.taymans@gmail.com">wim.taymans@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;"><div class="im">On Thu, 2009-05-07 at 10:23 -0300, Tiago Katcipis wrote: > Im having some trouble making a wav player, when i try to build the > pipeline using gst-launch it works fine, but the source code building > the same pipeline generates an error. Im sorry if the question is > stupid, im new at gstreamer and im not getting what im doing > wrong :-(. I followed an example i found on gstreamer documentation. > > The gst-launch comand: > gst-launch filesrc location="exemploWav.wav" ! wavparse ! > audioconvert ! gconfaudiosink </div>Hi, Check the result codes from various methods (hint some elements will not link correctly. Another hint, read some more about dynamic pads) Wim <div><div></div><div class="h5">> > The source code that builds the same pipe (or at least it should > build): > #include <gst/gst.h> > #include <glib.h> > > 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_free (debug); > > g_printerr ("Error: %s\n", error->message); > g_error_free (error); > > g_main_loop_quit (loop); > break; > } > default: > g_print("Teste.....[%d]\n", GST_MESSAGE_TYPE (msg)); > break; > } > > return TRUE; > } > > int > main (int argc, > char *argv[]) > { > GMainLoop *loop; > > GstElement *pipeline, *source, *sink, *convert, *wavparse; > GstBus *bus; > > /* Initialisation */ > gst_init (&argc, &argv); > > loop = g_main_loop_new (NULL, FALSE); > > /* Check input arguments */ > if (argc != 2) { > g_printerr ("Usage: %s <Wav filename>\n", argv[0]); > return -1; > } > > /* Create gstreamer elements */ > pipeline = gst_pipeline_new ("wav_player"); > source = gst_element_factory_make ("filesrc", > "file_source"); > wavparse = gst_element_factory_make ("wavparse", "wav_parser"); > convert = gst_element_factory_make ("audioconvert", > "audio_convert"); > sink = gst_element_factory_make > ("gconfaudiosink","gnome_output"); > > if (!pipeline || !source || !sink || !convert || !wavparse ) { > 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); > > /* we add all elements into the pipeline */ > gst_bin_add_many (GST_BIN (pipeline), > source, convert, wavparse, sink, NULL); > > /* we link the elements together */ > gst_element_link (source, wavparse); > gst_element_link (wavparse, convert); > gst_element_link (convert, sink); > > > /* 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; > } > > The error: > Error: Erro no fluxo interno de dados. (something like "Error on > internal data flow"). > > best regards, > Katcipis </div></div><div><div></div><div class="h5">> ------------------------------------------------------------------------------ > The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your > production scanning environment may not be a perfect world - but thanks to > Kodak, there's a perfect scanner to get the job done! 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