void take_photo (GtkButton *button, gpointer data)
{
 GstElement *pipeline, *jpegenc, *fakesink, *filesink;

 pipeline = g_object_get_data (G_OBJECT (button), "pipeline");
jpegenc =  gst_bin_get_by_name (GST_BIN (pipeline), "encoder");
fakesink = gst_bin_get_by_name (GST_BIN (pipeline), "fakesink");
filesink = gst_bin_get_by_name (GST_BIN (pipeline), "filesink");

g_object_set(filesink,"location","photos/prueba.jpg",NULL);

gst_element_unlink (jpegenc, fakesink);
gst_element_link (jpegenc, filesink);
gst_element_set_state (filesink, GST_STATE_PLAYING);
sleep (3);
gst_element_unlink (jpegenc, filesink);
gst_element_link (jpegenc, fakesink);
gst_element_set_state (filesink, GST_STATE_NULL);

}