AVI Home Video no Longer Works with Lion

Hi Everybody,

I have quite a few hours of AVI files (family footage dating back to early 70's transfered to avi from Super-8). This worked before I updated to Lion. Now I get the message "The document xxxxxxxx.avi” could not be opened. A required codec isn't available."

I don't understand why this now doesn't work. When I click on "Tell Me More" option avi is one of the files listed for Quicktime so...

Can anyone help with this?

Cheers