video fullscreen

[Marco Trapanese]

Hi,
in my Qt application runnin on a Raspberry Pi under a buildroot 
environment (no X) I wrote:

pipeline = gst_element_factory_make("playbin", 
"player");g_object_set(G_OBJECT(pipeline), "uri", uri, NULL);
bus = gst_element_get_bus(pipeline);
gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING);


When the video size is smaller than the resolution of the monitor, a 
transparent border appears around, showing the console behind.

How could I tell to the pipeline to show the video in fullscreen mode?
Thanks!
Marco