You can use
Blue Iris to make the PC-based Point of Sale desktop viewable from any PC, tablet or smartphone on your LAN or remotely at least 2 ways that I know of:
Method #1: As you stated, you could use the 'DeskCamera' software, and the POS' desktop would appear as an ONVIF-compatible IP camera to Blue Iris, according to their claims. I have no way of verifying that but assuming it does, then one cam can be configured in Blue Iris to stream MJPG.
Method #2: If DeskCamera is NOT installed on the POS but Blue Iris is, I know for sure that one cam can be configured as in the 2 images below to stream MJPG.
Either way you create the stream, either with DeskCamera or Blue Iris, then Blue Iris will allow the stream to be available to any PC, tablet or smartphone on the LAN or remotely using a browser (I tested with Chrome on PC and Safari on iPhone) or on the Blue Iris smartphone app. For a browser, the URL is:
Code:
http://BI-server_IP:port/mjpg/{cam-short-name}/video.mjpg
Image #1 is the 'General' configuration.
Image #2 is the 'Video' configuration.
Image #3 is a screenshot of my Blue Iris cams, the desktop cam is at upper left.
Image #4 is a screenshot taken on my iPhone of the desktop cam while using the Blue Iris app via WAN, over the LTE cellular network. I minimized Blue Iris on my PC so the desktop would reveal the browser window on the IPCT forum!
Image #5 is a graphical representation of the 2 methods.
Image #1
Image #2
Image #3
Image #4
Image #5