20来个过滤器编程源码大集合,需要了解过滤器编程的和COM编程的,这是必读基础教程,从事相关开发如播放器软件、播放器控件、转场效果、图象特殊处理等等，都需要跟这方面的知识打交道。-20 months to filter programming source large pool filters need to understand programming and COM programming. This is mandatory basis and guidance in the develo