可以不经过编解码就快速的切割视频文件，可以任意确定出点和入点-Can not read the codec on the Express cutting video files, can be identified and entry points

基于opencv，将两个视频横向拼接成为一个视频，要求视频的帧数必须相同。-Based on opencv, the two spliced ​ ​ into a video video lateral requires video fr a mes must be the same.