简单介绍一下视频的存储格式与基本操作方法。一个视频由很多帧的图片构成，当逐帧播放这些图片时，类似放电影形成连续动态的视频效果。从数学表达上来看，存储于计算机中的视频，可理解为一个3维数据，其中代表视频帧的长，宽，代表视频帧的帧数(Briefly describes the video storage format and basic methods of operation. A video is made up of pictures from many fr a mes. When fr a mes are played by fr a me, similar movies are used to form continuous, dynamic video effects. From the point of view of mathematical expression, stored in the computer's video, can be understood as a 3 dimensional data, which represent the video fr a me is long, wide, representative video fr a me number)