Delete from DVR

[TheDreadPirate]

Post processing is something you could do. Though I would experiment with post processing outside of Jellyfin before trying within the DVR post-processing functionality.

Regarding XMLTV stuff. Here is the script I use to pull down my IPTV's TV guide. The source is in JSON, this person's script converts it to XMLTV. They even back ported my modification regarding the "sub-title" field (not to be confused with subtitles).

https://github.com/Squizzy/NHK-World-XML-to-XMLTV

Perhaps you can use it as a starting point for your TV guide setup.