I upgraded to a 4k TV over the weekend, and when I try to play back a 4k movie (39944 kbps MKV, H264. AAC, DCA) on my Shield, I get about 5 minutes in and then start getting a few seconds of buffering here and there until it throws up the "network not fast enough" error.
The Shield is hard wired to my network. The server is a Core i7 2013 MacBook, and the movies are stored on a DS413j.
My suspicion is that the NAS is the bottleneck. Short of just buying a faster storage device for my 4K movies, anything I can do to give a bit more buffer time before starting playback?
I'm also wondering if maybe the H264 is an issue and will test later tonight with an H265 file.