Vivotek FD8167A User Manual page 285

http://IPAddr/cgi-bin/camctrl/eCamCtrl.cgi?stream=0&zooming=wide&zs=5
zooming is used to indicate the moving direction, and zs is used to indicate the speed.
To stop a continuous movement, you have to use the command as below:
http://IPAddr/cgi-bin/camctrl/eCamCtrl.cgi?stream=0&zoom=stop&zs=0
2. [Area zoom]: it means to zoom in on a specific area, here is an example for a directly moving
[x, y] is the desired coordinate, and it will be the center after movement
[w, h] is the scaled area size
[resolution] is the base range of this coordinate system
The example shows [w, h] = [864, 488], which means to zoom in to ratio x2.2 based on [1920x1080].
Pay attention to that [x, y, w, h] are essential parameters in an area zoom case, and the stream index is counted
from 0 as the first stream.
http://IPAddr/cgi-bin/camctrl/eCamCtrl.cgi?channel=0&stream=0&x=912&y=297&w=864&h=488&resolution=
1920x1080
PARAMETER VALUE
channel <0~(n-1)>
stream <0~(m-1)>
move home
up
down
left
right
auto pan
patrol
stop
zoom wide
tele
zooming wide or tele
zs 0 ~ 6
x <integer>
y <integer>
w <integer>
h <integer>
resolution <window size>
DESCRIPTION
Channel of video source.
Stream.
Move to home ROI.
Move up.
Move down.
Move left.
Move right.
Auto pan.
Auto patrol.
Stop auto pan/patrol.
Zoom larger view with current speed.
Zoom further with current speed.
Zoom without stopping for larger view or further view with zs speed,
used for joystick control.
Set the speed of zooming, "0" means stop.
The desired coordinate, and it will be the center after movement
The scaled area size
The resolution of streaming.
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User's Manual - 285