Sample Grabber filter

Question

Hi All,

    I would like to implement Still Image capture from a USB camera device. I am using Amcap source and able to capture the live video from the camera. Using help from msdn i am able to capture still image from a video file, now how do i change the source from video file to USB camera. My device also support Still Image capture pin. Any help would be greatly appreciated.

MSDN link i used is

http://msdn.microsoft.com/en-us/library/windows/desktop/dd407288%28v=vs.85%29.aspx

Regards

nathan