5 camera windows PC

[Baron Oz]

I have a need for running up to four HDMI cameras simultaneously. The stream will generally be 720p 30fps.
I have a BMD 4 HDMI capture card and a 4 HDMI output card to support three desktop monitors for me and a fourth studio monitor. I am planning on building a new PC in a small footprint case for easy transportation. My dilemma is which processor to use? I’m leaning toward the Intel Core I7 10700F with 8 cores and 16 threads. Any recommendations as far as GPU or other processors would be appreciated.

 

[Baron Oz]

Anybody? Any thoughts on these cards: Quadro M2000 vs GTX1660. GT610 maxes out GPU with 4 cameras. No gaming, just live video.

 

[Lawrence_SoCal]

I have no idea if a 8c/16t CPU can handle your overall workload.. in part depends on what features/effects/filters and plug-ins you use
I'm using a 10700K and a single NDI PTZ camera, limited audio filters, and PPTx in a windowed slide show, plus re-scaling 4K pre-recorded videos. CPU and GPU both in the 12-13% range

As for GPU, the general rule of thumb for OBS is to use a Turing NVENC based card, which means GTX 1650 Super or newer/higher
One consideration of workload is whether you are rendering/encoding for multiple cameras simultaneously. And you are driving GPU load with the 4 monitor setup. I can't say if a GTX 1650 Super would suffice for you, but if you are buying new, I wouldn't go lower
The challenge you will have is that most GTX 1650 Supers require more than 75W (ie what can be powered by PCIe bus), so extra power connector, and that usually precludes all but boutique SFF PC setups

Hopefully someonr who has more experience with your type of setup will comment

 

[Baron Oz]

Thanks! The output card gets swamped beyond three cameras. I think replacing it with a Quadro will do the trick, as far as NVENC goes, plus 4 monitor outs to boot. Power is not an issue, Building the PC myself, over 40 years of experience, so I can size the PS accordingly. The I/O cards are going to cost as much as the rest of the computer!

 

[Tomasz Góral]

check how many lines PCIE working with cpu and mobo.
Typical value is 20-24, sometimes is not enought.

 

[Baron Oz]

Ok, now have the BMD HDMI Quad card installed for video capture and the Quadro M2000 with NVENC, unlimited sessions. The M2000 is driving four monitors as well as encoding the stream. CPU usage is down around 3%, when recording goes up to 4.5%. I’d say this combo is a winnah!

 

[Lawrence_SoCal]

congrats and thanks for the follow up

 

[Jaylaw64]

I'm looking at putting together a rack mount box with 8-core i7s. There will be 4 NDI/HX cameras streaming to it. The default graphics card for the rack mount I'm looking at is a Quadro P2200 with 5GB RAM. For $500 it can be upgraded to a Quadro RTX4000 with 8GB. Any recommendation on whether the upgrade is worth it?

I will want to stream the mixed signal and capture it to disk. At this point I have no need to capture the individual streams pre-mix.

Thanks!