Along with that Blazin suggested, try Virtual Dub. Its free and its an amazing piece of software. It can seem advanced, but its not. It just has ALOT of options.
And I use free-codecs.com for all my video troubles: codec problems, making movies problems, etc. The site has TONS of free and shareware apps, codecs, media players, etc. When browsing categories, u can filter by freeware or shareware.