mitchell65 said:
Try AVS Video Converter here:
How to convert between all popular video formats?
I have finally had some success in this M4V conversion issue. I upgraded my iTunes to the very latest version, then installed a program called AVCLabs M4V Converter. This program cost me 39 bucks but it got the job done. It actually converts the M4V file directly, without any playing back and recording of the file like other video conversion programs. You have to have a valid iTunes program and account set up on your PC for this to work. This is where the "authorization" comes in. Thanks again for your assistance.