pluginName, ...)
   vw = videoWriter(url,pluginName)
     Opens the file using the specified plugin implementation.
     Available plugins include:

     'DirectShow': preferred method on Windows
       - Only available on Windows
       - See INSTALL.dshow.txt for installation instructions
       - The URL parameter should be a filename.
         - As a convenience, all forward slashes ('/') are automatically  
           converted to backslashes ('\')

     'ffmpegPopen2': safe method on Linux