http://stackoverflow.com/questions/6766333/capture-windows-screen-with-ffmpeg
http://muzso.hu/2013/06/28/how-to-record-a-screencast-full-desktop-or-a-window-with-ffmpeg
http://code.google.com/p/ardesia/issues/detail?id=19
https://github.com/rdp/screen-capture-recorder-to-video-windows-free
http://trac.ffmpeg.org/wiki/How%20to%20grab%20the%20desktop%20%28screen%29%20with%20FFmpeg
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