Is there an existing issue for this?

• I have searched the existing issues and did not find a similar issue

This bug exists on the latest available release of DistroAV and supported environment?

• I have checked this bug still exist on the latest available version of DistroAV
• I have checked that my OS / OBS / NDI versions are supported

OBS Log [URL] - Important!

https://obsproject.com/logs/pJ6rb8vta0LteEHf

Issue reported - Current Behavior

As reported by user neoinnovation in Discord:

I have an issue where I'm using 4 cameras running HX3 at 4K60.  My system can easily run all 4 in 4 separate OBS instances each with their own camera or with NDI Monitor. However when loading multiple cameras into 1 OBS instance it will stutter even at 2 cameras and 4 is completely unusable. Any idea on how to get it running in 1 OBS instance?
It also runs fine on my M1 Max MacBook Pro. It is my windows 11 computers that have issues.

Expected Behavior

OBS performance should not be affected by multiple NDI sources not being shown.

Steps To Reproduce

To duplicate:

Create 4 scenes with a 4K 60fps NDI source in each.
Change behavior in each source to be "Keep Active".
Start all 4 sources external to OBS so they are sending NDI data.

OBS Will become sluggish and fps rate drops to 1fps

Environment

- OS: Windows 11
- OBS: 32.0.2
- DistroAV: 6.1.1
- NDI: 6.3.0.3

Pre-Check for Bug Report

• I am able to reproduce the bug following the steps provided above
• I have confirmed this bug exist on more than one device/computer
• I have tested using a new scene collection to reproduce the issue
• I have tested on a 'clean' OBS installation (aka with no other scripts or plugin installed)