[Feature Requests] Improved frame rate output to better adapt with driver-level frame generation software to double the FPS

[crashGG]

Some DC/NAOMI games only have 30FPS. If could use 3rd party frame generation software to reach 60FPS, will have a smoother experience.For example: Lossless Scaling 's LSFG3.0 Frame Generation function

When it is paired with the PS1 and PS2 emulator's duplicate frame elimination option, the image is smooth with almost no lag or stuttering.

AMD's AFMF2 function https://www.amd.com/en/products/software/adrenalin/afmf.html also has good results.and Nvidia has also introduced a similar feature in the latest driver called “Smooth Motion”

But when I used these 3rd with flycast, I found obvious frame rate instability and image stuttering. So I requested a Improved frame rate output to better adapt to third-party frame generation tools.

Of course, a better way is to make a 60fps patch for each 30fps game. However, this is more difficult and sometimes there are bugs with some game mechanisms that break. Before this, third-party frame generation software is still the safest and most universal solution.

[flyinghead]

There are no duplicate frames in Flycast unless you use Full Framebuffer Emulation. The frame rate is determined by the game, and each dreamcast GPU render results in a new frame being displayed.

[crashGG]

Ok, I have edited the title and request content. For a emulator that has existed for many years, it will encounter various problems when paired with the new frame generation tools, but this is the direction of the future, which requires users and developers to constantly try and adjust.

[flyinghead]

I'm not sure what you are asking for then. How can Flycast "improve its frame rate output"?
Like I said the frame rate is controlled by the game. This causes issues because this rate isn't always constant: reduced FPS when loading, games switching from 30 FPS to 60 FPS and back, variable frame rate games, etc.
There is an enhancement request to duplicate frames as needed when rendering at less than 60 FPS (See #520) but this is precisely what you do not want.

[crashGG]

Maybe it's called the stability of the frame generation time, I don't know.maybe you can try the frame generation software above.