Using Two Cameras But Both Cannot Run At 30fps

newfuturefantasy

newfuturefantasy

New Member
Hello.
I want to use my two Logitech C922 cameras, and switch between the two alternative views as I stream. I am using a Mac Mini M1.
But when I set up the two cameras, I cannot run both at 30fps. I find that if I do this then one of the pictures freezes and stutters. The only solution I have found is to run one picture at 15fps, then both pictures are stable. However I am not happy with the quality of the video at 15fps.
Is there a way that I can run both cameras at 30fps with both pictures stable?
Thanks.
 
A

AaronD

Active Member
Each USB controller (not port), has a practical limit of one video stream. If you only have one controller with an internal hub, then you can only have one USB camera total. If you have multiple USB controllers, then you can have one camera on each.
 
newfuturefantasy

newfuturefantasy

New Member
AaronD, thanks for answering my question but I'm sorry I still don't understand. I can run two cameras simutaneously, only one of them has to be at a lower fps for both images to be stable. Both cameras are going into a USB hub then into my Mac M1 Mini. I can use both images, flick between them or have them both on the screen simutaneously. The problem is the lower 15fps setting of one camera and consequently the lower quality of the video.
How can I run them both at 30fps and so have a high quality picture from both cameras?
 
A

AaronD

Active Member
The limit is the total data rate per USB controller. Lower resolution and lower frame rate both reduce the amount of data. 1080p30 is more than half of the maximum.
 
A

AaronD

Active Member
Do you even *have* multiple controllers? That's the first question. If not, then you're stuck. If you do, then you need to figure out which ports go where, and plug them in accordingly.

I've seen laptops too, that do have two controllers, but one is dedicated to all of the internal gadgetry like the facecam, fingerprint reader, SD card slot, etc., and the other is dedicated to all of the external USB ports. That doesn't help either.
 
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