Note: This Beta version is Windows-only for the moment, macOS builds will follow later.
Find the the full patch notes for OBS Studio 29.1 Beta 1 here: github.com/obsproject/obs-studio/releases/tag/29.1.0-beta1
You can now opt-into the beta by adding the "OBS Studio Beta" app to your library, this will allow you to keep the stable release installed side-by-side and give you a clean installation to play with.
To add the beta to your library go to the OBS Studio store page and click "Request Access", you will be given access immediately:

If you instead wish to update your regular OBS Studio Steam install to the beta open the "Properties" window, navigate to the "Betas" tab and select the "beta" option in the dropdown:

(If you're not seeing the "beta" option yet try restarting your Steam client)
We need your help tracking down as many bugs as you can find before we make a full release! Please give the build a try and let us know here or in the #beta-testing channel on Discord: https://obsproject.com/discord
Note for users of the "nightly" branch: We are in the process of revamping our build infrastructure and have disabled the nightly branch for the time being. It is expected to return some time after the final release of 29.1.
Changed depots in beta_staging branch