How to use v4l2src in cv2.VideoCapture application?

VIM3
1

I had test with：
cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)

but it can only reach 17 FPS.
I expect high value fps. So want to use v4l2.
Is there any valid example for this need?
Thanks