Take a look at GraphEdit tool, where you can drag and drop several filters and test it. Or you can just drag and drop a Avi file into graphedit, immediately it will show the filters and connections. Also take a look at sample direct show filters (comes with dxsdk) . Start with simple BallFilter http://msdn.microsoft.com/en-us/library/windows/desktop/dd318194(v=vs.85).aspx[^] Hopes this helps jkchan http://cgmath.blogspot.com[^] If u can Dream... U can do it http://cgmath.blogspot.com/