Enable CAM3 CAM4 by commands

<p>1.Login CMSV6 PC Client<img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/670b299ca8a670b31ebf97e9c5b914df?showdoc=.jpg" alt="" /></p> <p>2.Input this command and set to Enable CAM3, CAM4 <strong><VariCfgSec Action="DEVICE_SET"><stMainStream ucFD_ExternalAHD="1" ></stMainStream></VariCfgSec></strong> <img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/a7764a576abc5845e513809a501da558?showdoc=.jpg" alt="" /></p> <p>3.If you want to Disable, please set commands below: <strong><VariCfgSec Action="DEVICE_SET"><stMainStream ucFD_ExternalAHD="0" ></stMainStream></VariCfgSec></strong></p>