利用opencv库实现的从指定位置视频截取关键帧的程序，需要安装opencv库，具体安装上官网可以进行查询。-Use opencv library to achieve the specified location from the video key frame interception procedures, need to install the opencv library, specific queries can be installed Shangguan network.

手机遥控器服务端手机端广播查询PC服务端，PC服务端应答-Broadcast mobile client queries the server PC, PC server response