Action Cam Compatible Mission Flight Trigger Capture Photo (PIXHAWK)

Howdy experts, needing your assistance please on what kind of action cam is compatible to use in pixhawk, it will trigger to capture photo on mission flights set using QGroundControl. Thank you.

These are not action cam but useful
http://ardupilot.org/copter/docs/common-apm-to-chdk-camera-link-tutorial.html

http://ardupilot.org/copter/docs/common-chdk-camera-control-tutorial.html

http://ardupilot.org/copter/docs/common-pixhawk-camera-trigger-setup.html