AVI Conversion?

[Sean W.Gallagher]

I've got this AVI that QuickTime will not open. It gives that standard 
AVI message that it has a "compressor that quicktime does not 
understand". Does anyone know of a program that will convert it? I 
tried cleaner but it came out blank. I'm also trying to show up the PC 
user that created it who told me that the reason I can't open the file 
is that "Macs suck".

-Sean