Open command (the DOS style window, I don't exactly know how it's called in english, think it's command), then go to the folder your ffmpeg.exe is in by climbing the folder structure with "cd Foldername" until you're there, then insert the code spinal posted.

edit: sniped. Yeah. The GUI version should be much easier to use.

This post has been edited by Guy.brush, Wed, December 7th, 2011 at 22:39

Reason: clarification