[SeVreN2013]

MKV for me MP4 does not support DTS Audio

Here's the Container Comparision chart

https://en.wikipedia.org/wiki/Comparison...er_formats

[Prof Yaffle]

However, there are always some problems occured while playing MKV due to codec incompatibility.

No, *container* compatibility. You can have an MP4 and an MKV that both hold identical streams - but a device (say, a TV over UPnP/DLNA) may only be able to read the MP4 because it simply doesn't understand MKV containers, even if it does understand the audio/video streams inside. It's a case of not being able to open the box rather than not being able to play what's inside.

[MrMC]

mkv == more subtilte formats supported