说明：  数字视频处理在matlab仿真实验时经常用到YUV格式视频序列进行测试，这里提供自己编写的yuv视频读取及统计视频帧数的程序源码。
(Digital video processing in matlab simulation experiment often used YUV format video sequence test here to write your own program source yuv video read and statistical video frames.)