tunerdevice 
 
-  Type: String
  -  Range / Valid values: Max 4095 characters
  -  Default: /dev/tuner0
  -  Group: Video Devices
 
 
The tuner device used for controlling the tuner in a tuner card. This option is only used when Motion is compiled for 
FreeBSD., The tuner device used for controlling the tuner in a tuner card. This option is only used when Motion is compiled for 
FreeBSD.
Make sure to remove or comment out this option when running Motion under Linux.