In the UK if we could demux terrestrial rather than tune to a channel, you could have everything all the time and as much of it as you want. Somebody has achieved a Linux version:
http://angrytechnician.wordpress.co...very-channel-from-freeview-onto-your-network/
http://angrytechnician.wordpress.co...very-channel-from-freeview-onto-your-network/