基于DirectShow核心框架的非线性编辑的基本原理，并提供了一个编辑的源代码，演示如何拼接两个音视频文件，实现视频过渡效果，并预览。 -Based on DirectShow core fr a mework of the basic principles of non-linear editing, and provides a source code editor, shows you how to splice the two audio and video files, video