Get the zoom capability from the camera.
This URL is only available in the PlatformK camera which there is optical zoom lens.
None
ZOOM_CAP_GET='TelePos,WidePos'
or
ZOOM_CAP_GET not found.TelePos: the nearest position of zoom.
WidePos: the farthest position of zoom.
Valid
http://ip:port/cgi-bin/encoder?USER=Admin&PWD=123456&ZOOM_CAP_GET
or
http://ip:port/cgi-bin/cmd/encoder?ZOOM_CAP_GET