I am having a similar problem with a Wintv-QuadHD card from Hauppauge.  Emby seems to be randomly holding one or more of my tuners, making them inaccessible for recording or live TV viewing.  It seems to happen with Roku and Apple TV clients.  When I exit from live TV viewing, the server intermittently keeps the tuner active, and it is no longer accessible. I am using a batch file I got from Hauppauge support that allows me to monitor all four tuners on my QuadHD card.  They probably have o