NVIDIA+TVHEADEND+UNRAID+ACCELERATED FFMPEG
I recently had a need to get hardware accelerated ffmpeg running on tvheaded under unraid, I eventually achieved this with a few tricks, here are my notes on what I did to achieve this.
First up, Unraid NVIDIA support
Install the Nvidia plugin under Unraid, this installs a custom kernel complete with the nidia drivers and docker runtime to support thiese.
Next install a hardware accelerated FFMPEG