说明：  当下比较流行的即时通信工具，比如MSN，QQ等都实现了视音频的功能，通过视频，音频，我们可以更好的和朋友通过网络进行沟通，本文通过DirectShow技术模拟QQ实现了视频和音频的采集，传输，基本实现了QQ的视音频聊天的功能。
(Present more popular instant messaging tools, such as MSN, QQ and so realize the function of the video and audio, through video, audio, we can better and friends to communicate through the network, this article through the DirectShow technology QQ realize analog video and audio collection, transmission, the basic realization of the QQ s video and audio chat features.)