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PTZ Limitation

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Norihiro Kamae edited this page Nov 18, 2021 · 3 revisions

Face Tracker PTZ Limitations

Currently the PTZ control feature is under development state. There are some limitations when you use this

  • When changing zoom, a user need to adjust gain (Kp) of pan and tilt.

    • Workaround: Users are suggested to set the slider Max control (zoom) to 0, and manually adjust gain Kp. The gain for pan and tilt should be around 40dB to 60dB but heavily depend on the zoom.
    • In future, the gain would be automatically adjusted by the zoom. Currently, there is a problem to get current state of zoom through VISCA protocol.
    • Only VISCA-over-IP experimentally automatically reuduces gain internally. However, since the zoom vs. binary code mapping depends on camera models, it's not accurate for some cameras.

  • Difference of device types

    • Not all features are implemented for all device types.

      through PTZ Controls VISCA-over-TCP VISCA-over-IP
      Pan and tilt control Yes Yes Yes
      Zoom control Yes (>= 0.4.1) Yes Yes
      Gain reduction by zoom Not yet Yes No
      Requirements obs-ptz n/a n/a
      Development status Experimental Deprecated

    • ONVIF If someone requires this protocol, please leave a comment.

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