When a Panasonic camera is configured for Internet mode (over HTTP) when using H.264 or MPEG-4 compression, the camera’s trigger inputs do not work correctly. The triggers are in a normally open state by default, but they do not enter an alarm state when the circuit is closed.
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Trigger-Inputs-Do-Not-Work-on-Panasonic-Cameras-Running-H.264-or-MPEG-4-in-Internet-Mode-Over-HTTP.pdf