This the latest info I have on VRD and Subtitles...
Basically the subtitles you have can be preserved or lost depending on the "container"(mp4,TS,mpg, etc) you use.
On the good side...'Timed Text' is the ONLY subtitle that my OLED tv will display...So I alway burn in the Subtitles.
I tried to find this message so I could "date" the information, but it seems to be gone. Search on (contianer)..."no results"
Finally found the date..."search" is very faulty.
-------------------------------------From My "VRD Problems" text file---------------------------------
May 26, 2018
We only support 3 kinds of subtitles... NTSC closed captions, PAL teletext and DVB subtitles. And we only support them for passthrough, which means you can only keep them if the output contianer also supports them. MKV files use either DVD subtitles or SRT subtitles, neither of which we currently support. MP4 supports closed captions, but not the other two. The only format that supports all 3 is TS.
----------------------------------------------------------------