/// <summary>
 /// 结束辅助摄像头
 /// </summary>
 /// <param name="id">摄像头标识id,如果为空,则关闭所有辅助摄像头</param>
 /// <returns>无返回值</returns>
 public static void StopExtendCamera(string id)
 {
     DeviceNativeMethods.nim_vchat_stop_extend_camera(id, "");
 }