说明：  功能： (1)读取给定的若干视频文件，提取帧率，并按照分钟为单位将视频保存为连续的多幅图像。如：帧率为25fps的话，则每分钟存储25幅图像，分钟的序号作为不同文件夹名称。 (2)对第i分钟的图像序列，随机选取其中的n幅(n为随机输入变量，不同的i对应的n也不同，显然n<原始帧率)。 (3)对(2)中选取出来的所有图像，按时间顺序生成视频。新视频的帧率为（随机选取出的图像总数/原始视频的时长）。 注：在VC6环境下，并且装有OPENCV1.0
(Features: (1) to read a given number of video files, extract frame rate, and in accordance with minutes as a unit the video is saved as a continuous multiple images. Such as: frame rate of 25fps, then the store 25 images per minute, minutes, the serial number as a different folder name. (2) the first i-minute image sequence, in which n randomly selected sites (n as random input variables, corresponding to n different i are also different, obviously n <the original frame rate). (3) (2) selected out of all the images in chronological order-generated video. The new video frame rate is (randomly selected images out of total number/length of time the original video). Note: In VC6 environment, and with OPENCV1.0)