directshow 为基础，封装了良好的类。用于 视频的获取和视频文件的读取，播放。 可以播放特定的时间段的视频文件。-directshow basis of a good Packaging category. Video for access and video files are read and broadcast. Can be broadcast at specific times of the video fil

利用opencv,directshow进行视频采集保存及运动检测-use opencv, directshow for preservation and Video Capture Motion Detection