VirtualDub
http://www.virtualdub.org/ in conjunction with some of the various plugins available will do the job in one or two steps. But what is your time worth? Unless you value a few dollars more than your precious time, or you really love learning new software, by the time you figure this powerful freeware app out for the first time and mess around with the various plug-ins and settings you may as well purchase a decent shareware app like VideoCharge and just get it done faster.