gst_controller_new returns NULL
Rossana Guerra
guerra.rossana at gmail.com
Tue Oct 25 17:16:43 PDT 2011
sorry I was appying a controller to a wrong name property. Now it is fixed,
the controller it's created.
GstController * ctrl = gst_object_control_properties(G_OBJECT(smpte),
"position",NULL);
>
> if (ctrl == NULL)
> {
> cout << "controller wasn't created.." << endl;
>
> GST_WARNING ("No puede controlar el elemento fuente\n");
> return 1;
> }
> else
> cout << "controller created..." << endl;
>
> cout << "Controlando..." << endl;
>
> // 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_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, 1.0);
>
//duracion = 500
> gst_interpolation_control_source_set(csource,(duracion *
> GST_MSECOND),&val_double);
>
> gst_controller_set_control_source (ctrl, "position", GST_CONTROL_SOURCE
> (csource));
>
> g_object_unref (csource);
>
>
>
2011/10/25 Rossana Guerra <guerra.rossana at gmail.com>
> I change the code, the problems is still there, the controller is NULL.
> I initialize the controller properly, after, gst_init.
>
> Here's the code, I don't know what it's wrong, very clueles, and worse, I
> need a controller (thanks!):
>
> GstController * ctrl = gst_object_control_properties(G_OBJECT(smpte),
> "property",NULL);
> cout << "ctrl's value..." << ctrl << endl; // returns 0
>
> if (ctrl == NULL)
> {
> cout << "controller wasn't created.." << endl;
>
> GST_WARNING ("No puede controlar el elemento fuente\n");
> return 1;
> }
> else
> cout << "controller created..." << endl;
>
> cout << "Controlando..." << endl;
>
> // 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_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);
>
> gst_controller_set_control_source (ctrl, "property", GST_CONTROL_SOURCE
> (csource));
>
> g_object_unref (csource);
>
>
>
>
>
> 2011/10/25 Rossana Guerra <guerra.rossana at gmail.com>
>
>> 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;
>> }
>>
>>
>>
>> 2011/10/25 Rossana Guerra <guerra.rossana at gmail.com>
>>
>>> 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):
>>>
>>>
>>> #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 * 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);
>>>
>>> }
>>>
>>> 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;
>>>
>>> }
>>>
>>> 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 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);
>>>
>>>
>>> g_object_set(smpte,"type", transicion, NULL);
>>>
>>> return bin;
>>> }
>>>
>>> void getAndSetController(GstElement * smpte, gdouble duracion)
>>>
>>> {
>>> GstController * ctrl = NULL;
>>> if (!(ctrl = gst_controller_new (G_OBJECT (smpte), "alpha",NULL))) {
>>> // Here it works fine
>>>
>>> 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);
>>>
>>>
>>> // 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);
>>>
>>> }
>>>
>>> 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
>>>
>>> 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);
>>>
>>> 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;
>>>
>>> /* init GStreamer */
>>> gst_init (&argc, &argv);
>>> gst_controller_init (&argc, &argv);
>>>
>>> loop = g_main_loop_new (NULL, FALSE);
>>>
>>> /* 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 */
>>>
>>> g_main_loop_run (loop);
>>>
>>> /* also clean up */
>>> gst_element_set_state (play, GST_STATE_NULL);
>>> gst_object_unref (GST_OBJECT (play));
>>> return 0;
>>>
>>> }
>>>
>>>
>>>
>>>
>>>
>>> 2011/10/25 Stefan Sauer <ensonic at hora-obscura.de>
>>>
>>>> **
>>>> On 10/25/2011 08:06 AM, Rossana Guerra wrote:
>>>>
>>>> Hello everyone, I am translating the following code to C/C++:
>>>> http://notes.brooks.nu/2011/01/python-gstreamer-controller/
>>>> It's a controller for controlling the alpha channel during crossfade, I
>>>> adapted it for transitions, using, smpte instead.
>>>>
>>>>
>>>> smptealpha does not have a property called "alpha". Only "border" and
>>>> "invert" are controllable right now.
>>>>
>>>> Stefan
>>>>
>>>>
>>>> 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;
>>>> }
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> // 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;
>>>> }
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> gstreamer-devel mailing listgstreamer-devel at lists.freedesktop.orghttp://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>>>
>>>
>>
>
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