First, thanks for your fantastic offering of spacedesk Server and Viewer!!! So very thankful to have found your products!!!!
We're using the product to send secondary monitor video from one computer as an input source in OBS Studio on another computer (without using VGA or HDMI capture card). This seems to be working great! In our case, we're using to live stream our Sunday morning church services. Video from the first computer is pre and post-service announcements as well as displaying words for the worship songs we sing and from time-to time showing a video clip, graphic, or other presentation. This video gets sent to a projector and several TVs around the building. I've got the spacedesk server set to duplicate video with the second monitor on the source PC and we use the spacedesk VIEWER (beta 0.9.25 currently) Windows desktop application on the OBS Studio computer, using "Window Capture" of the viewer app. OBS grabs just the remote video portion (client area of app as OBS seems to call it) of the VIEWER app without any problem. Works great! (almost!)
Only issue we have is that the spacedesk VIEWER application has a window border that is also captured. It seems that the right and bottom edges are more pronounced with a slightly thicker white line, though top and left are also visible.
Any chance that you might be able to add as a option, to remove those borders?