Replicating video stream in AvStream

Hello All,

My current job is to write a AvStream based driver which can replicate the camera stream to several processes, just like SplitCam or ManyCam.
The purpose of such driver is to deliver the stream to several applications simulatiously, whille each applications will obviously instatinate its own filter.

I have tested a ManyCam virtual driver with Avshws example using WinDbg and saw that it created many filters with pins, but issue acquire command only to a single pin. What I don't understand is the principle behind cloning the frame from a single pin to several filters/pin, created by various processes. Can anyone please drop a hint ?

10x
Sagi