directshow,mpeg1Filter-mpeg1解码器源代码；编译环境需要direct9的debug版本的bassClsss 还需要mpeg2dec-0.4.1的三个debug库，此是开源的；用filter的架构，mpeg1的解码源码；-directshow, mpeg1Filter-mpeg1 decoder source code compile the debug version of the environmental needs direct9 of bassClsss a