If you decide to go the PC route, this is probably the simplest & friendliest way:
http://betalabs.nokia.com/apps/inter...ideo-converter

Although, I was somewhat shocked to see that not only is it not being maintained (and it's closed-source AFAIK), but the download link is apparently gone! I saw at least one URL mentioned in one of the Bug Report threads that may or may not work for you...