How to capture full screen?

[JohnsonWang]

I want to capture full screen, not the screen part in core. Window Key + PrtScr is not suitable for me.

I hope to capture the screen after filter processing like scanline, and include the left & right border in 16:9. The resolution of screen I captured is what the screen resolution set in Mister.ini

Is there any way to achieve the goal?

[AngelicLiver]

An external HDMI capture device would be required.

To the best of my knowledge Linux does not have access to the output post framebuffer for capture of the upscaled and filtered images.

[JohnsonWang]

Thank you.

[BigMac2]

I want to capture full screen, not the screen part in core. Window Key + PrtScr is not suitable for me.

I hope to capture the screen after filter processing like scanline, and include the left & right border in 16:9. The resolution of screen I captured is what the screen resolution set in Mister.ini

Is there any way to achieve the goal?

I've found this, but I've misread what you really wanted.
https://github.com/MiSTer-devel/Scripts ... demo/nginx