What do you have for hardware?

Shield works great but you can't schedule it.

You can do recording with any DVR hardware or any capture device (usb or pcie) on your pc.

Super simple, but sorta pointless with all these servers with catchup these days.

Still, it's an option.

Alternatively you can try TV Headend for a free linux solution

dreamlink t1 and t1 plus has a scheduled recording feature. works great...