Not sure about DTS (I think passthrough works, at least, if you have a receiver, and I'm pretty sure it'll at least give you stereo from it if you don't) but an

Not sure about DTS (I think passthrough works, at least, if you have a receiver, and I'm pretty sure it'll at least give you stereo from it if you don't) but an RPi2 will do h.264 1080p video no problem. Any Pi, however, will fail to play the newer h.265/hevc codec at anything above maybe SD resolutions, as they lack hardware support for that codec and don't have anywhere near the horsepower to give you anything but an audio-desynced slideshow in software.