Short problem description:
MKV file playback is smooth on my Acer Iconia A1 810, because the HW acceleration is used in MXPlayer for video track (AC3 audio is decoded by SW custom codec).
TS file has the same video track (PAL 1080i) and audio track (AC3) as the MKV file above, but the HW acceleration is not used.
In fact, the MKV file is repacked version of the original TS file (using mkvmerge).
Please see the details in thread "[Feature Request] .ts file is not HW-accelerated but repacked to MKV is"
Thank you in advance!