I want to turn my 1080p MKV files to m4v to use on my Apple TV 3. Want quality picture. Do I just use the default Apple TV 3 settings from the nightly build, or is it worth any other settings being changed.
If those source MKV files are already of manageable size (meaning they aren't direct, non-reencoded BD rips), a simple remux could be preferable (time, quality) to reencoding the entire thing with HB. Give a try to Subler.