[Python] Opencv changing camera resolution with v4l2 backend not working

I am using opencv 4.10.0 from conda-forge compiled with v4l2 backend on ubuntu.

It seems I can't set the camera resolution, is there any workaround?

import cv2 as cv

cam = cv.VideoCapture(0, cv.CAP_V4L2)
w, h = 1920, 1080
cam.set(cv.CAP_PROP_FRAME_WIDTH, w)
cam.set(cv.CAP_PROP_FRAME_HEIGHT, h)

actual_width = cam.get(cv.CAP_PROP_FRAME_WIDTH)
actual_height = cam.get(cv.CAP_PROP_FRAME_HEIGHT)
print(f"Resolution: {actual_width}x{actual_height}")


Output:

Resolution: 640.0x480.0


PS: the resolution is valid for that camera. When using the cheese app, it defaults to 1920x1080 which is the one I want.

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