Center Click

The center click is a conditional command. The ONVIF driver will support it only if the device supports the optional translation space - http://www.onvif.org/ver10/tptz/PanTiltSpaces/TranslationSpaceFov.

See https://www.onvif.org/specs/srv/ptz/ONVIF-PTZ-Service-Spec-v1712.pdf (Section A.3.2 Pan/Tilt Translation Space in FOV).