Invalid property's type for a controller at runtime: `G_VALUE_TYPE (value) == self->priv->type' failed

[Rossana Guerra]

HI Stefan, thanks for your help, I changed the variable type from gdouble to
guint, same error.

Here's the whole code example:


#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 = 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;

  guint duracion = 500.0;
  guint transicion = 1;


    /* init GStreamer */
  gst_init (&argc, &argv);
  bool iniciado = 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");

  cout << "Creando pipeline..." << endl;

  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");
  g_object_set(smpte,"type", transicion, NULL);
  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;
  }


  // Controller creation

  GstController * ctrl = gst_object_control_properties(G_OBJECT(smpte),
"position",NULL);

  if (ctrl == NULL)
  {
        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);

  // Set interpolation mode

  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);

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);
  g_value_unset (&val_double);

  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);

  queue = gst_element_factory_make("queue", "queue");
  sink  = gst_element_factory_make("autovideosink", "sink");

  gst_bin_add_many (GST_BIN (pipeline),src1, src2, dec1, dec2, alfa1, smpte,
mixer, queue, color, sink, NULL);

  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);


  /* 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;
}






2011/10/26 Stefan Sauer <ensonic at hora-obscura.de>

> **
> On 10/26/2011 03:12 AM, Rossana Guerra wrote:
>
> Hi I trying to control the position property of a smptealpha element. It
> controls the opacity of the alpha channel,
>
>  no, position controls the transition of the fade. 0.0:input1, 1.0:input2.
>
>   it varies from 0.0 to 1.0.
> The duration of this setting is 500ms.
>
> I am working around this problem, it happens at runtime, I can't figure out
> what it's wrong.
>
>
> What is not working? The code snippet looks more of less okay. Maybe you
> can post a full standalone example.
>
> Stefan
>
>  Thanks and regards,
>
> Rossana
>
>
> Here's the code;
> _____________
>
>
> gst_interpolation_control_source_set: assertion `G_VALUE_TYPE (value) ==
> self->priv->type' failed
>
> // Agrego Controlador
>
>   gdouble duracion = 500;
>
>  guint64 duracion = 500;
>
>   GstController * ctrl = gst_object_control_properties(G_OBJECT(smpte),
> "position",NULL);
>
>   if (ctrl == NULL)
>   {
>         GST_WARNING ("No puede controlar el elemento fuente\n");
>         return 0;
>   }
>
>
>   // Todo valor GValue debe inicializarse en 0
>   GValue val_double = { 0, };
>   g_value_init (&val_double, G_TYPE_DOUBLE);
>
>
>   // 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);
>
> 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);
>   g_value_unset (&val_double);
>
>
>
> _______________________________________________
> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20111026/83ef9f03/attachment.htm>