Axis Communications 241Q Using CGI links to control PTZ devices, PTZ control modes, Control panel

36AXIS 241Q/241S - Pan Tilt Zoom

Using CGI links to control PTZ devices

User-defined CGI links on the Live View page can be used to issue HTTP API requests, such as PTZ commands. These links are configured in the Live View Layout settings, see page 11.

PTZ control modes

The PTZ device can also be controlled using click-in-imagemovement, which has two different types of navigation - Center and Joystick.

Center mode means that when clicking in the image, the camera view centers on the absolute position that was clicked.

Joystick mode moves the camera in the direction of the mouse pointer. By clicking and holding the mouse button down in the image, the PTZ device moves the camera in that direction, relative to the center of the image. The farther from the center the image is clicked, the greater the movement. The camera stops moving when the button is released.

Note: There is also joystick support in AXIS Media Control (AMC).

Control panel

The focus and iris (image brightness) can be adjusted manually by using the control bars, or they can be set for automatic adjustment, by clicking the Auto iris and Auto focus buttons.

Note: These buttons appear only if the PTZ driver installed supports them.

To access the Auto iris and Auto focus buttons, click on the Control panel button. The menu to the right will then appear in the upper left hand corner of the screen.

There are also driver specific shortcuts that can appear in the Control Panel. In the screen to the right, a driver has been installed that brings up the Wiper shortcut button, which allows the user to configure and use a windshield wiping action with the Axis video server.

Preset positions

Also available with many PTZ devices are Preset positions. These presets are selected from the drop-down Source list on the Live View

page and will move and/or zoom the camera to a pre-defined position, i.e. to cover an area of particular interest. Events can also be configured to go to preset positions when triggered. For information on setting up preset positions, please see Preset positions, on page 34, and the online help.

Guard tour

A guard tour moves between chosen Preset Positions, one-by-one, in a pre-determined order or randomly, and for configurable time periods. Unlike the Sequence Mode, which is a viewing application under Live View Config (see Live View Config, on page 23), the guard tour sequence will keep running after the user has logged off or closed the browser.