Green/Purple tint on HDMI Capture Card - iMac 27" Late 2012 (GTX 660M) - Sonoma OCLP

Hi everyone,

I'm facing a persistent color distortion issue (green and purple tint) when using an HDMI capture card in OBS on my iMac 27-inch Late 2012 (iMac13,2).

Specs:

- CPU: Intel Core i5 (Late 2012)

- GPU: NVIDIA GeForce GTX 660M (Kepler)

- OS: macOS Sonoma 14.x via OCLP

- RAM: 24GB / SSD: 500GB

The Issue:

In OBS, the video feed from the capture card shows distorted colors (green and purple).

What I've tried:

1. Changing formats in OBS: Tried NV12 (it's green), tried YUY2 (still distorted).

2. QuickTime Player: The colors are PERFECT here, so the hardware and the cable are fine. However, QuickTime has too much latency and is capped at 30fps.

1. Root Patches: I have already applied the Post-Install Root Patches for Kepler graphics.

- Is there a specific OCLP setting or a "boot-arg" that fixes YUV color mapping for Kepler on Sonoma?

- Does anyone know why QuickTime (AVFoundation) handles the color correctly while OBS fails?

- Is this a known limitation of the current Kepler patches on 14.0+?

Thanks for any help!