I was referring to a Classic Amiga PAL demo with smooth scrolling.
Super frog game is smooth on my ASUS G1S laptop (via WinUAE).
You might not be able to see the jerkiness -- different people have different tolerances for it. If you actually took video of your screen with a high speed camera and played it back slowly, you'd see the jerkiness. It really is happening.
An A/B comparison between a properly synced display and one that isn't would show the difference well -- you could probably see it then.
Are you claiming jerky frame rates while playing back 24FPS on 60hz LCD with PureVideo HD or Avivo HD video processor?
NVIDIA PureVideo HD (Geforce 8)covers the following(quoting nVIDIA)...
All of those features you're listing focus on *recovering the original frames* of the film. All of the features listed are basically motion-detection techniques to try to reconstruct the original frames from the fragments generated by various telecine conversions (including reconversion to progressive).
All this does though is recover the original frame! Once you have your nice original frames, it *still* has to perform a framerate conversion, which still leads to jerkiness unless the source frame rate can be evenly divided into the target framerate.
It *does* reduce jerkiness in the sense that it removes any jerkiness caused in the mastering of the source materal. The reconstructed video data that results is in fact not jerky. When you actually *DISPLAY* it though you're introducing jerkiness in your final pulldown conversion. It's just better than the much-worse jerkiness you'd get from cascaded pulldown conversions.
It can't magically make 24fps or 50fps fit into a 60fps framerate smoothly.
Run the emulated Amiga in NTSC mode.
This actually works. There will still be the occasional glitch due to very slight differences in framerate (unless you can 100% accurately synchronize the mode -- this is hard to do unless your emulator has direct access to the timing controls of the video drivers), but it will mostly look great.
The only problem is that tons of software on the Amiga is carefully timed to run synchronized with a 50Hz display, and simply won't play or sound right when run in NTSC mode.