Did you know that FLOW ACAP supports PTZ AXIS cameras? It can also recognize when the camera leaves its home position in which case the video analysis will stop. This is to prevent receiving data that is not relevant to your desired setup and to avoid false positives.
One of the supported PTZ cameras is the M5526-E which is an all-in-one solution running the FLOW ACAP application.
Try the FLOW demokit and try how easy it is to set up your own traffic video analytics.