This page will show you how to connect the camera to pixhawk for MAVlink QGC
The ADTi 61MAX V1 cameras can work directly with ADTI POS &CTRL Unit for MAVlink QGC, if you are using standard PX4 or Ardupilot firmware and standard QGC for ground control software, you do not need to do any another work, simply connnect the camera with POS & CTRL Unit, choose the right IP address inyour video feed device such as GCS or you PC (192.168.144.100 ) and then connect and power on.
you will see the video feed, as well as QGC will automatically download the camera QGC user interface.
Hardware Connections , you will need:
1Flight controller with PX4 or ardupilot and compatible with QGC