I have a collection of about 300 Blu-ray discs which I've ripped to 720p h264 MKV format with either DTS or AC3 passthru audio. I have been using Plex to play them and everything has worked great. Due to a change in my home theatre setup, I can no longer use Plex and have to use an Apple TV (the new version 3). Obviously, the ATV doesn't handle MKV files. I'm looking for a suggestion on how I can transcode the files to a format the ATV can play. I don't want to lose video quality and I'm assuming there must be some way to transcode the h264 and audio to a different container format. Any ideas how to do this on a Mac? Thanks a lot.