This thread has piqued my interest.
Dusted off an old Amazon Fire TV and was able to get adb working so I have my first tuner somewhat ready.
Also dusted off a Roku Ultra but when I try to issue a REST API command it says 404 for the keypress/home command. I was able to verify that the rest api is working as the / of the URL shows a status xml response. Did they remove the rest api abilities from the Roku Ultra?
One other question. My channels DVR is on a Mac Mini and I have access to a blackmagic HDMI capture card that I could potentially plugin. Is there a way to record from this capture card using ffmpeg?
Many thanks to everyone in this thread - this is the answer to TVE going fooey.