Convert Dolby Vision to MKV

[TheDreadPirate]

@TheDreadPirate you have been trying to convert DV for months now, have a look at dovi_tool to strip the DV layers https://github.com/quietvoid/dovi_tool
a lot of (or most of) will have HDR10 fallback and without the DV meta that's where it will land

I've figured out most of the process.  But I'm struggling with the final output file where I am unable to skip in the video properly.  It will take forever and when it actually does there is no sound.  Something about frame time stamps.  The solutions I've found regarding that haven't worked, so still researching.