Well I did the following change and it doesn't work, with the right propery it couldn't create the controller either. I am clueless. if (!(ctrl = gst_controller_new (G_OBJECT(smpte), "property",NULL))) { cout << "ctrl vale..." << ctrl << endl; cout << "no pudo crear controlador..." << endl; GST_WARNING ("No puede controlar el elemento fuente\n"); return 1; } <div class="gmail_quote">2011/10/25 Rossana Guerra <<a href="mailto:guerra.rossana@gmail.com">guerra.rossana@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Thanks Stefan, as I understand, now I have to control the "position" property. I run an the following example, where I control the "alpha" property, and it works fine. I don't know if it's due a different pipeline, but it doesn't concern about "alpha" property. Here's the code which runs (without sound): <div class="im"> #include <gst.h> #include <controller/gstcontroller.h> #include <iostream> using namespace std; // Manejador de errores static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { ::::::::::::::: } </div><div class="im">static void on_pad_added (GstElement *element, GstPad *pad, gpointer data) { GstPad *sinkpad = NULL; </div> GstElement * queue = (GstElement *) data;<div class="im"> /* Ahora linkeo el pad de comp con sink pad */ g_print ("Dynamic pad created, linking queue\n"); </div> sinkpad = gst_element_get_static_pad (queue, "sink");<div class="im"> gst_pad_link (pad, sinkpad); gst_object_unref (sinkpad); } </div>GstElement * getBin(const gchar * nomBin, GstElement * &alfa1, GstElement *&smpte, GstElement * &color, gint transicion = 1) { GstElement * bin = gst_bin_new(nomBin); if (!bin) { g_printerr ("No se pudo crear el bin. Saliendo\n"); return NULL;<div class="im"> } alfa1 = gst_element_factory_make ("alpha","alfa1"); smpte = gst_element_factory_make ("smptealpha","smpte"); color = gst_element_factory_make ("ffmpegcolorspace", "color"); GstElement * mixer = gst_element_factory_make("videomixer", "mixer"); if ((!alfa1) || (!smpte) || (!color) || (!mixer)) { g_printerr ("Alguno de los elementos del Bin no pudo ser creado. Saliendo\n"); </div> return NULL; } // Anexamos al bin gst_bin_add_many(GST_BIN (bin),alfa1,smpte,mixer,color,NULL); // Enlazamos elementos gst_element_link (alfa1, mixer); gst_element_link (smpte, mixer); gst_element_link (mixer,color);<div class="im"> g_object_set(smpte,"type", transicion, NULL); </div> return bin; } void getAndSetController(GstElement * smpte, gdouble duracion)<div class="im"> { GstController * ctrl = NULL; </div> if (!(ctrl = gst_controller_new (G_OBJECT (smpte), "alpha",NULL))) { // Here it works fine<div class="im"> GST_WARNING ("No puede controlar el elemento fuente\n"); </div> return;<div class="im"> } // Todo valor GValue debe inicializarse en 0 GValue val_double = { 0, }; g_value_init (&val_double, G_TYPE_DOUBLE); // Creo la fuente al controlador y la asocio al controlador // Seteo modo de interpolacion 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); // Seteo primer valor g_value_set_double(&val_double, 0.0); gst_interpolation_control_source_set(csource,(0 * GST_MSECOND),&val_double); // Seteo segundo valor g_value_set_double (&val_double, duracion); gst_interpolation_control_source_set(csource,(1 * GST_MSECOND),&val_double); g_object_unref (csource); } </div> void addGhostPadsToBin(GstElement *alfa1, GstElement * smpte, 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 (smpte, "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 crossTransicion(gdouble duracion, GstElement * & bin,gint transicion = 1) { // devuelve el bin GstElement * alfa1, *smpte, *color; alfa1 = 0; smpte = 0; color = 0; bin = getBin("bin",alfa1, smpte,color,transicion); // Crea el bin y los elementos getAndSetController(smpte,duracion); addGhostPadsToBin(alfa1, smpte, 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; // ejecuta 2 clips serialmente con un crosdfade entre ellos usando el elemento (GnlOlin) gnlcomposition if ((comp = gst_element_factory_make("gnlcomposition", "micomposicion")) == NULL) { printf ("\n Fallo al crear gnlcomposition \n"); return NULL; } op = gst_element_factory_make("gnloperation", "op"); crossTransicion(dur_crossfade, bin,1); 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; } // configura primer 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, "uri", 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); // crea 2º clip 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; } g_object_set (video2, "location", argv[2], NULL); g_object_set (video2,"uri",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 backend viewer<div class="im"> queue = gst_element_factory_make("queue", "queue"); sink = gst_element_factory_make("autovideosink", "sink"); </div><div class="im"> pipeline = gst_pipeline_new ("video-player"); </div> /* 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); return pipeline; } void startPlay(GstElement * pip) { /* Set the pipeline to "playing" state*/ gst_element_set_state (pip, GST_STATE_PLAYING); } int main(gint argc, gchar *argv[]) { GMainLoop *loop = NULL; <div class="im"> /* init GStreamer */ gst_init (&argc, &argv); gst_controller_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); </div> /* chequeamos sintaxis */ if (argc != 3) { g_print ("Uso: %s <URI1> <URI2>\n", argv[0]); return -1; } GstElement * play = getSetPipeline(argv); GstBus *bus2 = gst_pipeline_get_bus (GST_PIPELINE (play)); gst_bus_add_watch (bus2, bus_call, loop); gst_object_unref (bus2); cout << "...PLAY" << endl; startPlay(play); /* now run */<div class="im"> g_main_loop_run (loop); /* also clean up */ </div> gst_element_set_state (play, GST_STATE_NULL); gst_object_unref (GST_OBJECT (play)); return 0;<div> <div></div><div class="h5"> } <div class="gmail_quote">2011/10/25 Stefan Sauer <<a href="mailto:ensonic@hora-obscura.de" target="_blank">ensonic@hora-obscura.de</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div bgcolor="#ffffff" text="#000000"><div> On 10/25/2011 08:06 AM, Rossana Guerra wrote: <blockquote type="cite">Hello everyone, I am translating the following code to C/C++: <a href="http://notes.brooks.nu/2011/01/python-gstreamer-controller/" target="_blank">http://notes.brooks.nu/2011/01/python-gstreamer-controller/</a> It's a controller for controlling the alpha channel during crossfade, I adapted it for transitions, using, smpte instead. </blockquote> </div> smptealpha does not have a property called "alpha". Only "border" and "invert" are controllable right now. Stefan<div><div></div><div> <blockquote type="cite"> The fact is it returns NULL and the programs stop running. The code is below, I appreciate any suggestion. I am a bit clueless is an adaptation of a code I did before and it works. Thanks and regards. Rossana //// the code #include <gst.h> #include <controller/gstcontroller.h> #include <iostream> using namespace std; // Manejador de errores static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { ::::::::::::::::::::::::................ } static void on_pad_added (GstElement *element, GstPad *pad, gpointer data) { GstPad *sinkpad = NULL; GstElement * elemento = (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 (elemento, "sink"); gst_pad_link (pad, sinkpad); gst_object_unref(sinkpad); } int main(int argc, char *argv[]) { GMainLoop *loop = NULL; GstElement *src1, *src2,*dec1,*dec2,*alfa1,*color,*smpte,*queue,*sink; GstBus *bus; gdouble duracion = 500; gint transicion = 1; cout << "Inicio..." << endl; /* init GStreamer */ gst_init (&argc, &argv); gst_controller_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /* make sure we have input */ if (argc != 3) { g_print ("Usage: %s <filename1> <filename2>\n", argv[0]); return -1; } src1 = gst_element_factory_make("filesrc", "src1"); g_object_set(G_OBJECT(src1),"location",argv[1], NULL); src2 = gst_element_factory_make("filesrc", "src2"); g_object_set(G_OBJECT(src1),"location",argv[2], NULL); GstElement *pipeline = gst_pipeline_new ("video-player"); dec1 = gst_element_factory_make("decodebin2","dec1"); dec2 = gst_element_factory_make("decodebin2","dec2"); bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); alfa1 = gst_element_factory_make ("alpha","alfa1"); smpte = gst_element_factory_make ("smptealpha","smpte"); color = gst_element_factory_make ("ffmpegcolorspace", "color"); GstElement * mixer = gst_element_factory_make("videomixer", "mixer"); if ((!alfa1) || (!smpte) || (!color) || (!mixer)) { g_printerr ("Alguno de los elementos del Bin no pudo ser creado. Saliendo\n"); return 0; } queue = gst_element_factory_make("queue", "queue"); sink = gst_element_factory_make("autovideosink", "sink"); cout << "Creando 1..." << endl; // Agrego Controlador GstController * ctrl = NULL; if (!(ctrl = gst_controller_new (G_OBJECT(smpte), "alpha",NULL))) /// Here's the error, always return NULL { cout << "ctrl value..." << ctrl << endl; GST_WARNING ("No puede controlar el elemento fuente\n"); return 1; } </blockquote> </div></div><blockquote type="cite"><div><div></div><div> // Todo valor GValue debe inicializarse en 0 GValue val_double = { 0, }; g_value_init (&val_double, G_TYPE_DOUBLE); // Creo la fuente al controlador y la asocio al controlador // Seteo modo de interpolacion 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); // Seteo primer valor g_value_set_double(&val_double, 0.0); gst_interpolation_control_source_set(csource,(0 * GST_MSECOND),&val_double); // Seteo segundo valor g_value_set_double (&val_double, duracion); gst_interpolation_control_source_set(csource,(1 * GST_MSECOND),&val_double); g_object_unref (csource); gst_bin_add_many (GST_BIN (pipeline),src1, src2, dec1, dec2, alfa1, smpte, mixer, queue, color, sink, NULL); g_signal_connect (G_OBJECT (dec1), "pad-added", G_CALLBACK (on_pad_added),alfa1); g_signal_connect (G_OBJECT (dec2), "pad-added", G_CALLBACK (on_pad_added),smpte); gst_element_link (src1,dec1); gst_element_link (src2,dec2); gst_element_link (alfa1,mixer); gst_element_link (smpte,mixer); gst_element_link (mixer,queue); gst_element_link (queue,sink); g_object_set(smpte,"type", transicion, NULL); /* now run */ gst_element_set_state (pipeline, GST_STATE_PLAYING); cout << "Playing..." << endl; g_main_loop_run (loop); /* also clean up */ gst_element_set_state (pipeline, GST_STATE_NULL); gst_object_unref (GST_OBJECT (pipeline)); return 0; } </div></div><pre><fieldset></fieldset> _______________________________________________ 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> </pre> </blockquote> </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> </div></div></blockquote></div>