ingest three 720p60 uncompressed camera feeds over blackmagic duo 2 into
So PC is only dealing with a single video input, right. You can't mix all 3 cameras view at once on the PC in OBS?
note this isn't a criticism. if I am guessing correctly, that makes a LOT of sense on an under-powered CPU to limit how much video the PC/OBS is having to process, so having a switcher in front is one way to accomplish that in a multi-camera scenario
To
@B1ackt34 , for context, when I started streaming (using OBS) I used my work engineering class (ie beefy) workstation laptop. Due to security software running on it, my streams would get interrupted (I think it was the DLP, but not sure). I then tried to stream with a late 2015 gaming laptop with an Intel i5-6300HQ (2.3GHz 4c/4t), 8GB RAM, with a Nvidia GeForce GTX 960M and a SATA SSD (not HDD) Win 10 - fresh/clean install, and optimized [I know what I'm doing with Windows], and failed as the PC wasn't up to the task (no gaming, just alternating between USB webcam and simple pre-recorded videos (some were 4K), alongside a PPTx slide show window capture, streaming at 720p 30fps with no OBS effects/filters). I’ve learned a lot more about OBS since then, and I might be able to just squeak it out, but wasn’t worth it. I needed to focus on content and presentation, so I got a newer, much more powerful PC, which should last for many years.
My point is that if you go for something that just meets your requirements today, tomorrow you might go, 'Oh, I'll add X" and now you go beyond the system's capabilities. And then there are the impacts of Operating System, driver, etc updates. So I'd recommend having a healthy buffer between minimum specs and what you acquire so you don't end up needing/wanting to replace it soon [assuming you have the extra budget]