[mythtv-users] No subtitle menu for OTA recordings

[Bob]

I have 3 systems I use, only one of which offers the "Subtitles" menu 
for the same recording (when viewed on any of the 3 systems, recording 
format is ATSC 1.0).

I have a BE/FE combo that does not offer the "Subtitles" menu, a 
dedicated FE that does, and another FE that does not. I've compared the 
settings and I don't understand the difference.

Any suggestions?