playcap是一个视频抓取源代码，Unlike AMCap, it does

not allow you to capture data to a file. Instead, it searches for the first-PlayCap is a simple video capture device previewer.　Unlike AMCap, it does

not allow you to capture data to a file.　Instead, it searches for the first

available video capture device registered in the system, connects to it,

and begins displaying its video data in a small window.　



It demonstrates a simple example of using the ICaptureGraphBuilder2 and

ICreateDevEnum interfaces to build a capture graph.　This type of simple

previewing might be used in a videoconferencing application, for example.