Not that would be a bug.
RIFE schould change the frame rate.
Just tested, here it works fine.
(loaded a 25fps source, enabled RIFE and changed the frame rate to 40/1 and the output frame rate changed to 40fps)
LOL, looking at the screenshot, you are using a 25fps source and you want to go to 23.976 => RIFE is for adding frames not removing.
Since the frame rate RIFE is fed with is below the current frame rate there is nothing for RIFE to do so the output frame rate won't change.
Cu Selur
RIFE schould change the frame rate.
Just tested, here it works fine.
(loaded a 25fps source, enabled RIFE and changed the frame rate to 40/1 and the output frame rate changed to 40fps)
LOL, looking at the screenshot, you are using a 25fps source and you want to go to 23.976 => RIFE is for adding frames not removing.
Since the frame rate RIFE is fed with is below the current frame rate there is nothing for RIFE to do so the output frame rate won't change.
Cu Selur