Tvheadend

Could look at a making a cron script that incorporates tv_merge. https://github.com/XMLTV/xmltv/blob/master/filter/tv_merge

You would download two xml files then use tv_merge to merge into a new xml file. Each additional xml file would be downloaded and merged until you had all. Once complete that final xml file would be fed to TVH in the manner you normally use. I use tv_grab_file https://github.com/b-jesch/tv_grab_file

Hmmm. I wonder if I can somehow embed the logic of tv_merge into a new tv_grab file. I'll have to think about that.