[colonelpopcorn]

There's a great write up on how to proxy/multiplex rtmp streams with nginx on the OBS forums.

https://obsproject.com/forum/resources/obs-studio-stream-to-...

Edit: That one is newer and maybe more useful. Here's the one I had used before. https://obsproject.com/forum/resources/how-to-set-up-your-ow...

[flexiondotorg]

That is a nifty solution