Standard FPS is a must for external edit/export file integrity. Pros will never prefer size over frame rate which I see as your explanation of why you just don't duplicate frames where images don't change. I know this seems inefficient to keep all frames but it in fact is practical to do so for people needing a serious tool. Look into screenflow by Telestream for Mac for ideas. If you cant lock the frame rate at industry standards then this product wont be an ideal choice for Broadcast companies and similar. Make it standard frame rates so that further editing can be done with out complications. Do this an your product will be solid. Preferred FPS -- 29.97, 59.94, 24,30,60 -- All at 1080 or 2160. Consumers can utilize your current way of recording video on screen but pros need specificity for reasons you may not care to understand. Let me know what you can do.