Handbrake on a Mac is an easy and quality way to rip video.
Should I just use the default Apple TV3 to convert for everything?
I am not looking to stream.
This is basically what I am doing just to give a better picture.
I use the Hauppauge 2 and HDPVRCapture(For Mac) to capture video and convert to MP4.
I want to load some of these videos on my iPad to watch and store for the future.
http://www.hdpvrcapture.com
TV in the car but, as you're obviously aware, too many obstacles. I originally thought about it back when I had the original HDD based model (more video/audio output options and onboard storage) but figured a bouncing car probably isn't the best place for it, amongst other reasons.