Success using OBS to capture with Source Record?

[fixnmix]

So I am wondering if anyone has tried or know of someone who uses(d) OBS to successfully record, 8 4K Pro Res 422 Streams via BlackMagic Deck Link 8K Pro G 2's (12G SDI) .
I have all the hardware spec'ed, computer, PCI Chassis, HD's, etc. but need a software solution for capture.
Thanks in advance.

Edit for clarity:

There will be two Black Magic 8K Pro G2 cards in two Thunderbolt PCI chassis via a MacStudio M2 Ultra.

 

[turingsroot]

OBS can ingest the DeckLink feeds fine via the Blackmagic plugin but recording 8 simultaneous 4K ProRes 422 streams is going to hammer storage bandwidth pretty hard, roughly 600-800 MB/s sustained across all 8 depending on content. Source Record plugin can split each input into its own file which is what you want. Write to separate NVMe volumes or a striped RAID because a single drive won't keep up even on fast NVMe. Worth testing the Apple ProRes encoder in OBS too since on M2 Ultra it's hardware accelerated and barely touches the CPU.

 

[fixnmix]

OBS can ingest the DeckLink feeds fine via the Blackmagic plugin but recording 8 simultaneous 4K ProRes 422 streams is going to hammer storage bandwidth pretty hard, roughly 600-800 MB/s sustained across all 8 depending on content. Source Record plugin can split each input into its own file which is what you want. Write to separate NVMe volumes or a striped RAID because a single drive won't keep up even on fast NVMe. Worth testing the Apple ProRes encoder in OBS too since on M2 Ultra it's hardware accelerated and barely touches the CPU.

Thanks for the reply, the recording of these streams has been a bit of a concern, for sure. Now real-world testing is about our only option, which is fine, I just wanted to get as many ducks in a row before we pulled the trigger on all the expensive items. I guess I didn't think that I could send the feed from OBS to two different NVMe drives, I was considering a RAID.....

 

[fixnmix]

You should also keep an eye on the Thunderbolt bus bandwidth, especially if both PCI chassis are hitting the same controller. Depending on your setup, this can definitely mess with capture stability. If you can, it is better to split the devices across different Thunderbolt ports or separate controllers to avoid saturating the bus. It is probably worth doing a test run with a few simultaneous streams just to check the actual load and make sure everything holds up under pressure.

100% we are going to be aware of what devices are on what busses, why we are carefully selecting the computer and capture drive(s).