If you’re running Mac OS this is the go to app for converting to iTunes

I’ve been using iVi for years. I recommend it to everyone that runs Mac OS and wants to add their personal collection of videos to iTunes. The updates have always run effortlessly. It has been drag and drop forever. Metadata info populates very well. Fully customizable to my needs and videos have had at least a 98% success rate. Batch converting is very convenient. Videos also play no problem on my WD media players (as long as their firmware is uptodate). There might be other apps out there that do the same things, but I wouldn’t know. I’ve never had to try anything else because iVI has taken very good care of me.

Quik5ilver about iVI, v3.65