The latest GstreamerSDK and gst_x_overlay_set_window_handle (ubuntu)

[maveze]

Hi, i have a strange problem. I've used the SDK from: 
http://docs.gstreamer.com/display/GstSDK/Tutorials
<http://docs.gstreamer.com/display/GstSDK/Tutorials>  
and *it runs well when installed on my system*.
i tried to run the same code on a different system and i get:

(11111:21498): GStreamer-CRITICAL **: gst_implements_interface_cast:
assertion `gst_element_implements_interface (GST_ELEMENT (from),
iface_type)' failed

** (11111:21498): CRITICAL **: gst_x_overlay_set_window_handle: assertion
`overlay != NULL' failed

and a new window opens with the movie inside instead of showing in a  gtk
drawing area(GtkWidget).

i have libgstreamer0.10-0-dev installed on the second system *BUT NOT THE
SDK*.

i think that error came from realize callback:
static void realize_cb (GtkWidget *widget, CustomData *data)
{
    data->window = gtk_widget_get_window (widget);
    guintptr window_handle;
    if (!gdk_window_ensure_native (data->window))
        g_error ("Couldn't create native window needed for GstXOverlay!");

        /* Retrieve window handler from GDK */
#if defined (GDK_WINDOWING_WIN32)
    window_handle = (guintptr)GDK_WINDOW_HWND (data->window);
#elif defined (GDK_WINDOWING_QUARTZ)
    window_handle = gdk_quartz_window_get_nsview (data->window);
#elif defined (GDK_WINDOWING_X11)
    window_handle = GDK_WINDOW_XID (data->window);
#endif
    /* Pass it to playbin2, which implements XOverlay and will forward it to
the video sink */
    gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->playbin2),
window_handle);
}

how can i make this work?



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