.. versionchanged:: 0.6.1
            Log video source process ID.

def set_video_config(self, video_config):
        '''
        .. versionchanged:: 0.6.1
            Log video source process ID.
        '''
        self.video_config = video_config
        if video_config is None:
            self.disable_video()
            return

        py_exe = sys.executable
        port = self.canvas_slave.video_sink.socket_info['port']
        transport = self.canvas_slave.video_sink.socket_info['transport']
        host = (self.canvas_slave.video_sink.socket_info['host']
                .replace('*', 'localhost'))

        # Terminate existing process (if running).
        self.cleanup_video()

        # Launch new video source process using JSON serialized video
        # configuration.
        command = [py_exe, '-m', 'pygst_utils.video_view.video_source',
                   'fromjson', '-p', str(port), transport, host,
                   video_config.to_json()]
        logger.info(' '.join(command))
        self.video_source_process = sp.Popen(command)
        logger.info('Launched video source process: %s',
                    self.video_source_process.pid)
        self.canvas_slave.enable()