Is there any way other than usb capture to get video stream from camera(hdmi/sdi) for use with CV libraries?

Hello I was wondering if there was a way to get low latency video stream from camera’s hdmi/sdi output without using usb? Would I be able to use the 2x csi2 ports with a hdmi2csi bridge to achieve this? The goal is that I can take signal from camera and then use Computer vision libraries on it.

It is possible. The capture goes through v4l2 interface. There are existing camera modules from our partners. Please check

For having optimal performance, using OpenCV may not be a good choice since there is limitation in Jetson hardware. You can take a look at
[Gstreamer] nvvidconv, BGR as INPUT

So it is recommended use gstreamer or jetson_multimedia_api.