Most cord-cutters who want to record live channels should instead consider a simpler over-the-air DVR, such as as the Tablo Quad or a live TV streaming service that doesn’t require any in-home DVR hardware in the first place. To get Channels DVR running on a Raspberry Pi, you’ll need to be comfortable working with non-graphical command line interfaces and with poking around in your router’s settings. Setting one up isn’t for the faint of heart though. But as the $35 Raspberry Pi micro-PC has become more powerful, you no longer need to spend upwards of $200 on server hardware.
The problem with Channels has always been the hardware cost, as you’ve needed a desktop computer, NAS box, or Nvidia Shield TV to run the DVR server.