Anyway to do this? I have used Subler and MP4Tools to take mkv files and convert them to m4v ("pass thru") settings enabled. Subler crashes with over 5 "saves" going on, and MP4Tools sometimes stalls at the demuxing stage. I can't seem to find a way to take the elementary streams in a m2ts file and remux them into the iTunes/ATV friendly m4v container. Any ideas? I really don't want to re-encode with Handbrake, since that takes days.