webcam_port 
 
-  Type: Integer
  -  Range / Valid values: 0 - 65535
  -  Default: 0 (disabled)
  -  Group: Obsolete
 
 
TCP port on which motion will listen for incoming connects with its webcam server.
This option has been replaced by the stream_port option
Note that each camera thread must have its own unique port number and it must also be different from the control_port number.
A good value to select is 8081 for camera 1, 8082 for camera 2, 8083 for camera 3 etc etc.