How can I stream 3440x1440 to YouTube?

[Tokenn]

I want to stream my gameplay on a widescreen 3440x1440 monitor to YouTube. However the image on my monitor just doesn't fit in the YouTube window. What setting do I need to adjust in OBS to accomplish what I want to do? I'll drop the YouTube image down to 1080p if necessary.

 

[koala]

See this guide:

Aspect Ratio Guide | OBS

OBS Knowledge Base. Learn how to properly make your content fit on your canvas, and how to deal with aspect ratios and scaling

obsproject.com