Right, this is why I mentioned the known, Mac-specific issue with some Apple silicon-based servers and live TV. I’ll see if I can dig up one of the threads. The workaround I found was to disable HW-accelerated encoding (HW-acceleration can generally be left enabled)
All the testing I performed was with an HDHomeRun Flex 4K with OTA broadcasts in 480i, 720p, and 1080i (all MPEG2VIDEO). This was on an M2 MacBook Air-based server. In all cases, with HW-accelerated encoding enabled it would fail. I’d suggest leaving that off for the time being just to ensure it isn’t contributing to the failures in your case.
Yeah, I probably should have just left that part out. Or perhaps worded it differently. Mea culpa.
Edit:
I found the thread I was referring to:
There are others floating around out there. It seems that even in that thread the “encoding” workaround didn’t work for everybody; so, it’s obviously not a panacea.
Edit 2:
Here’s another recent’ish thread discussing the issue:
https://forums.plex.tv/t/live-tv-not-working-after-macos-update-1-43-0-10492/936373/12
