2 USB Camera's Work... But Not 3
- Thread starter Fattire
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carlmmii
Active Member
Power is only part of the issue. The other is bandwidth. Webcams can easily use over half the rated 480mbps of USB2.0, so connecting two of them to the same host controller is not guaranteed to work.
The bandwidth limitation is per host controller, so the only guarantee is to connect them to separate host controllers to ensure they have the necessary bandwidth to operate without conflicting with each other.
To get a better view of how your USB ports are set up, use USBview.
r1ch.net
The bandwidth limitation is per host controller, so the only guarantee is to connect them to separate host controllers to ensure they have the necessary bandwidth to operate without conflicting with each other.
To get a better view of how your USB ports are set up, use USBview.
Managing USB bandwidth with USBView | r1ch.net
Find out how to make your USB devices perform optimally by moving them to less saturated controllers.
Thank you for the response, I learned a lot!Power is only part of the issue. The other is bandwidth. Webcams can easily use over half the rated 480mbps of USB2.0, so connecting two of them to the same host controller is not guaranteed to work.
The bandwidth limitation is per host controller, so the only guarantee is to connect them to separate host controllers to ensure they have the necessary bandwidth to operate without conflicting with each other.
To get a better view of how your USB ports are set up, use USBview.
Managing USB bandwidth with USBView | r1ch.net
Find out how to make your USB devices perform optimally by moving them to less saturated controllers.
I will look into that, ty!
Hey I just figured out how to get this to work. I have three identical USB 3.0 Capture cards (they are all seen as a webcam device in windows 10 with the same model name). My original logic of how to go about with things is that you would need to use a powered USB HUB since most affordable capture cards and webcams relies on USB power, which means these USB devices are going to drain all the power from the computer's USB ports. This is why when connecting two of the same webcams or what not in the same USB controller will cause issues since the USB controller has limited power which needs to be shared among the two USB ports. No motherboard will provide a separate USB controller chip for each USB port, this is not how the motherboard computing industries ever planned to design motherboards, each USB controller chip communicates with at least 2 to 4 USB ports depending on the motherboard designs.
How to get multiple webcams of the same type to work on OBS:
Buy a quality USB 3.0 POWERED HUB, make sure you read the details of the POWERED USB HUB can at least provide 2 AMPS of power for each USB port before buying, so that it can supply enough power to the USB devices which solely relies on USB power. This way the motherboard's USB controller chips aren't going to drain all it's power for the USB devices.
Anyhow this is how I got OBS to recognize three identical USB webcams. Need to also make sure that each webcam are using an equal portion of bandwidth divided for three webcams. Each USB controller has a max threshold bandwidth and would need to see the chip's max bandwidth specifications. Hope this works for others.
How to get multiple webcams of the same type to work on OBS:
Buy a quality USB 3.0 POWERED HUB, make sure you read the details of the POWERED USB HUB can at least provide 2 AMPS of power for each USB port before buying, so that it can supply enough power to the USB devices which solely relies on USB power. This way the motherboard's USB controller chips aren't going to drain all it's power for the USB devices.
Anyhow this is how I got OBS to recognize three identical USB webcams. Need to also make sure that each webcam are using an equal portion of bandwidth divided for three webcams. Each USB controller has a max threshold bandwidth and would need to see the chip's max bandwidth specifications. Hope this works for others.
Just want to update, seems like some USB 3 ports on my motherboard doesn't work with a powered USB 3.0 hub which has multiple camera, you would need to keep trying different USB 3.0 ports and see which accepts the powered USB 3.0 hub which has multiple camera.
I'm using a decade old motherboard...
I'm using a decade old motherboard...
The Problem ist the bandwitch limitation Not the capture cards.
One capture per USB root hub.
A normal USB hub brings nothing its like you wall Socket and an 3 Socket plug you can try to add 3x 3000 Watt heaters to one Socket but it will kill the Fuse.
Whe. You need mor cams use network cams Like ndi cams
One capture per USB root hub.
A normal USB hub brings nothing its like you wall Socket and an 3 Socket plug you can try to add 3x 3000 Watt heaters to one Socket but it will kill the Fuse.
Whe. You need mor cams use network cams Like ndi cams