Implementation of Video Filter's Copyright Protection Based on DirectShow
LU Man-hong · Science Technology and Engineering · 2009
The Microsoft's DirectShow development kit provides an opened platform for developing high quality multimedia software.Filter is the fundamental part of DirectShow.Owing to the DirectShow's opening attribute,every filter can be used by other applications after registration in the operating system.Two methods of copyright protection to filter are implemented.In these two methods,one is so hard that everyone who hasn't authorization can not use filter,and the other one allows everybody to use filter but there will be some text on the video stream to awake user to register.