Forcing a specific screen sharing frame rate

At some points during the chat, I have to share video and slideshows, and for that it is important to have a high, consistent frame rate and resolution. Right now, when I do a test with any number of sessions, it shares the desktop at native resolution (4K), but at no more than 11 frames per second, even when there is bandwidth to spare.

Is there any way to fix this? Obviously, I have already set the minimum desktop sharing frame rate to 30, but it appears that the videobridge is overriding it. Is there another setting that can fix this? Can the videobridge be recompiled to have a different sort of behaviour?