I asked this question a few months back and cannot remmeber what little freeware proggy i used. The thing is is was perfect for i [and you?] wanted.
I remeber it was downloaded from click here [i think] but i've had a quick look and couldnt locate the section for such proggies.
Search these forums and with a bit a look, my thread will be returned to you. I have had a search myself but no luck (again).
Anyway i did come up with this > click here
Also click here i did use this and it was ok but the AVI files were too big. I think! So i did use another program eventually but cannot remember the name of it :-(