Hi,
We would suggest use CSI/MIPI cameras for this use-case. For using USB cameras, you may hit bandwidth constraint as we have seen on Jetson Nano and Xavier NX:
connected more than two usb cameras problem on deepstream-app (Jetson Nano Dev Kit) - #12 by DaneLLL
For CSI/MIPI cameras, please check with our partners:
Jetson Ecosystem | NVIDIA Developer