tion arguments to plugin.
     Currently no plugin arguments are supported right now.  In the 
     future, we may allow the user to do things like have DirectShow
     automatically convert to grayscale, or give options to trade off 
     speed with seeking precision.
 
 Once you have created a videoReader object, you must next call NEXT,
 SEEK, or STEP at least once so that it will read some frame from disk.  
 *After* calling one of these methods, you may call GETFRAME as many 
 times as you wou