介紹DirectShow 开发应用程序，我们可以很方便地从支持 WDM 驱动模型的采集卡上捕获数据， 并且进行相应的后期处理乃至存储到文件中-DirectShow application development, we can easily support the WDM driver model from the capture card to capture data and the corresponding post-processing as well as to a file