插件的实现程序。该插件对Filter Graph Manager进行扩展，让它

支持IMPEG1Builder接口。使用该接口可以为MPEG1文件自动构建播放用的Filter

Graph（使用DirectShow集成的MPEG1相关的一系列Filter）。-plug-in the realization process. The plug-right Graph Filter Manager for expansion, it supports IMPEG1Builder interface. The interface can be used to automatically convert documents with the players Construction Filter Graph (using DirectShow integrated MPEG1 related to the series of Filter).