Thanks for the wonderful TVHeadend software.
Here's a suggestion.
I'm using it with ComHem in Sweden.
Some channels do not have subtitling via TEXTSUB but just as a page in the teletext.
For example SVT1 and SVT2 which use page 199 and 299 respectively.
My suggestion is to be able to set teletext pages to be scanned and parsed, either globally or per channel.
Thanks for your attention.