So I'm hoping someone here may be able to help. Long story short, I have remuxed a large number of MKV files to MP4, via Subler, for use on my Apple TV 3. Unfortunately, at the time I didn't understand that the ATV3 (currently) does not support Profile 4.1 for video, only 4.0. So all of these mp4s are profile 4.1 and won't stream well to the ATV3 (they buffering endlessly, like 30 minutes or more just to start playing a two-hour movie). Alas, Subler doesn't support any option for muxing profile 4.0 video, only 4.1 and/or 3.1 Main and High. And remuxing at 3.1 (which supports 720p but not 1080p) wouldn't work either as I'm dealing with 1080p source material. So it seems i know have a bunch of mp4 versions of movies that are useless, on the Apple TV anyway. Aside from reencoding all of the files via Handbrake to profile 4.0, does anyone know of any other solution I may be missing? Thanks much to anyone who has any insight.