Is it possible to implement this as an option for video recording in Adrenalin? A reason this might be used is to capture frame drops and see frame rate changes in the recording itself and help diagnose graphical settings later. Maybe it could save space too.
In the settings under frame rate, current options are 30 or 60 frames per second. If VFR were implemented, maybe there would be additional options such as: "up to 60 fps VFR"