SwitcherEX is a special DirectShow capture filter. This filter is used to be able to switch capture filename without stopping capture graph to avoid loosing frames/sample's.

The package also contains a demo application called CapSwitch.
CapSwitch is designed to show the capability of developed DirectShow filter. With CapSwitch you also can do a performance test of your system to be sure, it is effectual enough to perform audio video capture from live source.