DeltaMikeCharlie Rather then messing up the testing thread, I thought I'd reply here
Once tested/vetted/working, what is your opinion of adding it to the LE repository for easy installation by those who want it?
For the subset of users with who just plugin a single supported DVB-T card and have a good tuning file PVR could be easy. Otherwise it will take time, know-how for setup and potentially support. Assuming you support TVHeadend via the tvheadend.org forum I don't see any major issue. Once the addon is working support needs to get handed to backend support. Integrating PVR backends could lead to more posts about getting specific tuners h/w and firmware installed and this is already a concern for devices not supported by the kernel. Without a LinuxTV expert one board this could well be an on-going issue.
As always on open source there is a question on what will happen if you decide to stop supporting the addon. edit4ever's excellent work is a case in point.
You do need to support the source on a own GitHub repo though not just a pre-built package. I can submit issue's and PR's there as things mature if I feel that it is worth adding NextPVR support. This will need to wait until the next version though since NextPVR currently doesn't do OTA ATSC (because it is terrible) and DVB-S is under re-development for improvement. I am monitoring upstream dtv-scanning-tables too since outside of the UK upstream conf files they suck.
There is also seems to be a big hole in the uses case for various tuners like SAT>IP, IPTV capture, HDHR devices, pipe devices, CAM/CI, ffmpeg integration and integrating XMLTV and Schedules Direct guide data. Not sure how to limit expectations and what this addon can do, and the differences in PVR on x64 on a full PC and aarch64 devices with an octopus of USB connections.