OpenCV for CSI Raspberry Pi Camera

Python
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1

Hi, I am trying to use OpenCV to capture image using raspberry pi v2 CSI camera in raspberry pi os bullseye. I am using OpenCV v4.7

I noticed that OpenCV only able to open CSI camera when CSI camera detected under mmal which returned by v4l2-ctl --list-devices but now camera detected under unicam

In certain circumstance, I must load camera overlays IMX219 which cause CSI camera to be detected under unicam returned by v4l2-ctl --list-devices.

I can use my camera normally using Picamera library, but not in OpenCV.

cap.isOpened() returned me true, but no frame was captured from csi camera using openCV.

Any ideas?

2

Nobody so far has bothered to implement this “unicam” interface in OpenCV.

You could be the first?

Examine the “picamera” library and see what’s needed to build a “Video I/O” backend for OpenCV from that.

or you could just use that library, instead of OpenCV’s VideoCapture.