实现视频图片的抓取，本代码是每秒抓取视频图像的一帧。需要用到CxImage类，请到网上下载。如果你不要连接数据库，请删除相关代码。-video pictures crawls, the code is crawls per second video image one. Need to resort to CxImage category, search online download. If you do not connect to the database, delete the rele