经过研究本人初略的将原代码进行了模拟，原理为首次进行全屏幕截图，其后只对变化的部分进行截图。代码写的比较粗糙望不要见笑。 附带一个远程视频传输的简单实现代码，用到DSPACK控件.-After studying my original strategy for the beginning of the simulation code, the principle for the first time to conduct all-Screenshots, only later to cha