__NB__ This *must* be called from a *different* thread than the GUI/Gtk thread.

def refresh_config(self):
        '''
        __NB__ This *must* be called from a *different* thread than the GUI/Gtk thread.
        '''
        if self.config_requested is not None:
            while self.video_view.xid is None:
                print 'waiting for GUI...'
                time.sleep(1)
            self.pipeline_manager.set_config(self.video_view.xid,
                                             self.config_requested,
                                             record_path=self.record_path)
            self.config_requested = None