They are command line tools.
See recommendation CX or newer at https://docs.google.com/spreadsheets/d/ ... jymVo/edit
I think almost no tv’s internal player is capable of DV MKV playback.
Do the P7->P8.1 conversion with any tool you like.
I wouldn't recommend converting trueHD, use the ac3 core in the file instead, it’s converted by the filmmaker and keeps director’s intention.
ST-DL refers to single track dual layer FEL file and DT-DL to dual track dual layer FEL.
Dolby Vision is very complicated, you may want to read more post to learn more of this.