TiVo recording to Plex retaining close-caption or subtitles

What would be the best workflow to copy a TiVo recording to my PLEX server and retain the CC (or Subtitles)? No editing involved -- I don't need to cut out commercials, but I do need to preserve the ability to turn on/off CC when playing back the recording through PLEX.

Suggestions? I've searched and have missed finding an answer...that works...

TiVo recording to Plex retaining close-caption or subtitles