If I stream Fortnite on PC via OBS it pixels easily, how can I set it correctly?

If I stream Fortnite on the PC via OBS it pixelates easily, how can I set it correctly?!

If you selected Minecraft (i.e. Java) as the window shot, you must not enlarge the window.

It should stay so small and the rest will be black. But when you have the finished video / watch the stream, it's perfect.

If it wasn't, check the settings.

Hope I could help you.