Hi all, I am totally new with GSteamer, so sorry for the lots of mistakes I have. I am trying to do the example of this link in C/C++ <a href="http://notes.brooks.nu/gstreamer-video-crossfade-example/">http://notes.brooks.nu/gstreamer-video-crossfade-example/</a> It's about crossfade. I doing it with .AVI files. At runtime I got the Resource not found error. Another examples, like a playbin, work properly with .AVI's, so I don't think is a codec issue. The video files are passing as arguments (uri format). Thanks in advance. ///////////////////////// Heres the code #include <gst.h> #include <controller/gstcontroller.h> #include <iostream> using namespace std; // Error handler 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 ("Final de 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: break; } return TRUE; } static void on_pad_added (GstElement *element, GstPad *pad, gpointer data) { GstPad *sinkpad; GstElement * queue = (GstElement *) data; /* We can now link this pad with the vorbis-decoder sink pad */ g_print ("Dynamic pad created, linking demuxer/decoder\n"); sinkpad = gst_element_get_static_pad (queue, "sink"); gst_pad_link (pad, sinkpad); gst_object_unref (sinkpad); } GstElement * getBin(const gchar * nomBin, GstElement * &alfa1, GstElement *&alfa2, GstElement * &color) { GstElement * bin = gst_bin_new(nomBin); if (!bin) { g_printerr ("No se pudo crear el bin. Saliendo\n"); return NULL; } alfa1 = gst_element_factory_make ("alpha","alfa1"); alfa2 = gst_element_factory_make ("alpha","alfa2"); color = gst_element_factory_make ("ffmpegcolorspace", "color"); GstElement * mixer = gst_element_factory_make("videomixer", "mixer"); if ((!alfa1) || (!alfa2) || (!color) || (!mixer)) { g_printerr ("Alguno de los elementos del Bin no pudo ser creado. Saliendo\n"); return NULL; } // Anexamos al bin gst_bin_add_many(GST_BIN (bin),alfa1,alfa2,mixer,color,NULL); // Enlazamos elementos gst_element_link (alfa1, mixer); gst_element_link (alfa2, mixer); gst_element_link (mixer,color); return bin; } void getAndSetController(GstElement * alfa2, gdouble duracion) { GstController * ctrl = NULL; if (!(ctrl = gst_controller_new (G_OBJECT (alfa2), "alpha",NULL))) { GST_WARNING ("No puede controlar el elemento fuente\n"); return; } // Todo valor GValue debe inicializarse en 0 GValue val_double = { 0, }; g_value_init (&val_double, G_TYPE_DOUBLE); // Seteo los valores de control del alfa2 GstInterpolationControlSource * csource = gst_interpolation_control_source_new(); gst_controller_set_control_source (ctrl, "alpha", GST_CONTROL_SOURCE (csource)); gst_interpolation_control_source_set_interpolation_mode(csource,GST_INTERPOLATE_LINEAR); g_value_set_double(&val_double, 0.0); gst_interpolation_control_source_set(csource,(0* GST_MSECOND),&val_double); g_value_set_double (&val_double, duracion); gst_interpolation_control_source_set(csource,(1 * GST_MSECOND),&val_double); g_object_unref (csource); } void addGhostPadsToBin(GstElement *alfa1, GstElement * alfa2, GstElement * color, GstElement* bin) { /* add ghostpad */ GstPad * pad1 = gst_element_get_static_pad (alfa1, "sink"); gst_element_add_pad(bin, gst_ghost_pad_new("alfasink1", pad1)); gst_object_unref (GST_OBJECT (pad1)); GstPad * pad2 = gst_element_get_static_pad (alfa2, "sink"); gst_element_add_pad(bin, gst_ghost_pad_new("alfasink2", pad2)); gst_object_unref(GST_OBJECT(pad2)); GstPad * pad3 = gst_element_get_static_pad (color, "src"); gst_element_add_pad(bin, gst_ghost_pad_new("colorsrc", pad3)); gst_object_unref(GST_OBJECT(pad3)); } void crossFade(gdouble duracion, GstElement * & bin) { // devuelve el bin GstElement * alfa1, *alfa2, *color; alfa1 = 0; alfa2 = 0; color = 0; bin = getBin("bin",alfa1, alfa2,color); // Crea el bin y los elementos getAndSetController(alfa2,duracion); addGhostPadsToBin(alfa1, alfa2, color, bin); } GstElement * getSetPipeline(gchar *argv[]) { gint dur1 = 9000; // duration (in ms) to play of first clip gint dur2 = 8000; // duration (in ms) to play of second clip gint dur_crossfade = 500; //number of milliseconds to crossfade for GstElement *comp = 0; GstElement *pipeline, *video1, *video2, *op, *bin, *queue, *sink; //we play two clips serially with a crossfade between them // using the gnonlin gnlcomposition element. if ((comp = gst_element_factory_make("gnlcomposition", "mycomposition")) == NULL) { printf ("\n Fallo al crear gnlcomposition \n"); return NULL; } // setup first clip if ((video1 = gst_element_factory_make("gnlfilesource", "video1")) == NULL) { printf ("\n Falló la creacion del gnlfilesource \n"); return NULL; } if (gst_bin_add (GST_BIN (comp), video1) == FALSE) { printf ("\n No pudo agregar video1 a comp \n"); return NULL; } g_object_set (video1, "location", argv[1], NULL); g_object_set (video1, "start", 0 * GST_MSECOND, NULL); g_object_set (video1, "duration", dur1 * GST_MSECOND, NULL); g_object_set (video1, "media-start", 0* GST_MSECOND, NULL); g_object_set (video1, "media-duration", dur1 * GST_MSECOND, NULL); g_object_set (video1, "priority", 1,NULL); if ((video2 = gst_element_factory_make("gnlfilesource", "video2")) == NULL) { printf ("\n Falló la creacion del gnlfilesource \n"); return NULL; } if (gst_bin_add (GST_BIN (comp), video2) == FALSE) { printf ("\n No pudo agregar video2 a comp \n"); return NULL; } // setup second clip g_object_set (video2, "location", argv[2], NULL); g_object_set (video2, "start", (dur1-dur_crossfade) * GST_MSECOND, NULL); g_object_set (video2, "duration", dur2 * GST_MSECOND, NULL); g_object_set (video2, "media-start", 0 * GST_MSECOND, NULL); g_object_set (video2, "media-duration", dur2 * GST_MSECOND, NULL); g_object_set (video2, "priority", 2,NULL); // setup the crossfade op = gst_element_factory_make("gnloperation", "op"); crossFade(dur_crossfade, bin); if (gst_bin_add (GST_BIN (op), bin) == FALSE) { printf ("\n No pudo agregar el bin a la gnloperacion op \n"); return NULL; } g_object_set (op,"start", (dur1-dur_crossfade) * GST_MSECOND,NULL); g_object_set (op,"duration", dur_crossfade * GST_MSECOND,NULL); g_object_set (op,"media-start", 0 * GST_MSECOND,NULL); g_object_set(op,"media-duration", dur_crossfade * GST_MSECOND,NULL); g_object_set(op,"priority",0,NULL); if (gst_bin_add (GST_BIN (comp), op) == FALSE) { printf ("\n No pudo agregar la gnloperacion a la gnlcomposition \n"); return NULL; } // setup the backend viewer queue = gst_element_factory_make("queue", "queue"); sink = gst_element_factory_make("autovideosink", "sink"); pipeline = gst_pipeline_new ("video-player"); /* Agrego elementos al pipeline */ gst_bin_add_many (GST_BIN (pipeline),comp, queue, sink, NULL); g_signal_connect (comp, "pad-added", G_CALLBACK (on_pad_added), queue); gst_element_link (queue, sink); cout << "creó pipeline!!!" << endl; return pipeline; } void startPlay(GstElement * pip) { /* Set the pipeline to "playing" state*/ cout << "antes del PLAY" << endl; gst_element_set_state (pip, GST_STATE_PLAYING); cout << "dp del PLAY" << endl; } int main(gint argc, gchar *argv[]) { GMainLoop *loop = NULL; /* init GStreamer */ gst_init (&argc, &argv); gst_controller_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /* make sure we have a URI */ if (argc != 3) { g_print ("Uso: %s <URI1> <URI2>\n", argv[0]); return -1; } GstElement * play = getSetPipeline(argv); cout << "creo pipeline" << endl; GstBus *bus2 = gst_pipeline_get_bus (GST_PIPELINE (play)); gst_bus_add_watch (bus2, bus_call, loop); gst_object_unref (bus2); cout << "start play" << endl; startPlay(play); /* now run */ g_main_loop_run (loop); /* also clean up */ gst_element_set_state (play, GST_STATE_NULL); gst_object_unref (GST_OBJECT (play)); return 0; }