The built in media player is really good IMO.
The manual lists the official limits, but it seems to play much more than just listed in the manual. For example, the manual lists a 20 mbps video bitrate limit, but I've played 45mbps content directly remuxed from bluray ISOs without issue.
The only common format encoding I've found it won't play is AVC [email protected]
with ReFrames set at 14 frame. No problem with 4 frame.
Of course, no h.265 playback.
To anser to specific format question; yes, it plays AVC and DTS MKVs, with at least the noted exception above.
Compiled format list from the manual:
External subtitle formats supported: .smi, .srt, .sub (MicroDVD, SubViewer 1.0/2.0), .ass,
.ssa, .txt (TMPlayer), .psb (PowerDivX), .dcs(DLP Cinema)
Internal subtitle formats supported: XSUB (supports internal subtitles generated from DivX6)
Maximum data transfer rate: at least as high as 45 Mbps (tested)
.asf, .wmv, .divx, .avi, .mp4, .m4v,.mov, .3gp, .3g2, .mkv, .ts, .trp, .tp, .mts, .m2ts, .vob, .mpg, .mpeg
VC-1 Advanced Simple and Main Profiles, DivX3.11, DivX4, DivX5, DivX6, XViD, H.264/AVC, Motion Jpeg,
MPEG-1, MPEG-2, MPEG-4 Part 2
WMA Standard, WMA 9 Professional, MPEG-1 Layer I, II, MPEG-1 Layer III (MP3), Dolby Digital,
Dolby Digital Plus, LPCM, ADPCM, DTS, (DTS-HD MA), AAC, AMR-NB, AMR-WB, HE-AAC, DVD-LPCM