I am unable to stream 4K movies from my NAS to an AppleTV 4K over WiFi. I have tried multiple 4K files and the experience is the same; the movies take extra long to start and they stop and buffer after less than a minute of playtime. I have troubleshooted and determined WiFI is not the problem. I have a high-end AC WiFi router that delivers >45MBps to the room I am attempting to stream to. My MacBook Pro in the same room as the 4K AppleTV streams 4K files instantly and flawlessly with zero buffering using VLC Player and Quicktime player. My network monitor shows that streaming a 4K movie from my NAS does not exceed 5MBps, well below my bandwidth capacity.
Why is Infuse not able to stream 4K MKV files? These files range in size from 10GB to 60GB. It doesn't make sense that my MacBook can stream just fine but Infuse on the AppleTV cannot.