Have a look at
Bytessence MPxConverter 1.1 (Linux) for converting to .amv for Linux or
Bytessence MPxConverter 1.1 (Windows) for Windows.
This is a program created by a member of this site and was originally focused on converting to .amv so you should find it quite helpful and it should work.
Also remember that you will need the correct codecs when converting from .mov files as well.
Let us know how that goes and whether that works.