Thank you for your reply,
I have recently installed a new AV-processor, Anthem AVM 70, and there is this strange scaling issue I have with madvr that scales 1920x1080 and 3840x2160 resolution movies to a 4608x2592 resolution.
I have tried to troubleshoot this issue with the help of Madvr support forum but not finding an obvious solution.
The simple solution to my problem is to exit JRiver server and restart JRiver when Anthem AVM 70 and the projector is up and running. After that shutdown of server and restart of JRiver (including server) there are no scaling issues.
I did not have this issue when I used my previous AVR Marantz SR 7011, so I’m leaning towards some weird scaling stuff going on with my Anthem AVM 70 and Madvr.
So, my thinking for now is to automate the shutdown and restart of JRiver server when Anthem AVM 70 and projector is turned on with the help of Flirc and Switchbot.
I already have this automation where JRiver starts in Theater view when the projector and AVM 70 is up and running and I would like before that to turn off JRiver server so I can start JRiver fresh.
I will continue to troubleshoot but I’m not confident that I can solve this as it only appeared when I introduced a new AV-processor.