MP4tools

MP4tools screenshots

Offshoot of the current version of the popular conversion tools called MKVtools.
Main window
MP4tools 3.0 : Main window

Alternative downloads

AVCLabs M4V Converter Plus
4.1.1
This program helps you convert M4V files on your Mac.
PS3 Video 9
6.0
FREE
Free video conversion application developed by Red Kawa.
Kigo M4V Converter for Mac OS X
4.2.2
Convert protected M4V files to MP4, iPod, iPhone or Audio format.