Is there any way to add black bars to fullscreen? [Java]

[11lora]

So I have a wide monitor and I want to record videos. But since YouTube videos are usually "normal" sized in screen resolution and I didn't want to play in a small window I wanted to ask if it is possible to change the resolution so I have black bars in fullscreen and in a window filling the whole screen. I tried changing the resolution in the launcher and in game but that didn't apply to fullscreen and when I tried a smaller resolution it ended up stretching the screen. When I change the resolution in the launcher it opens a normal sized window but that is useless in fullscreen so I would have to play with my desktop in the background which is a little annoying.

Is there any way to change the resolution so that there are black bars in full screen, making the window "normal" sized?

[jeyabrams]

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Edited February 19, 2023 by jeyabrams