Raspberry Pi Zero 和 OpenCV 上的网络摄像头损坏图像

Question

I attached a USB webcam to my Raspberry Pi Zero W though an OTG cable. When I run my python script the OpenCV video capture at first gave me select timeout errors:

import cv2 as cv
cap = cv.VideoCapture(0)
_, img = vs.read()
cv.imwrite(filename="image.jpg", img=img)

Then I tried:

rmmod uvcvideo
modprobe uvcvideo nodrop=1 timeout=5000 quirks=0x80

It doesn't give select timeout errors anymore but the image seems corrupt. Here is an output image from the webcam:

Answer 1

I fixed it a while ago and I thought I should answer my own question:

vc.set(cv.CAP_PROP_FRAME_WIDTH, 480)
vc.set(cv.CAP_PROP_FRAME_HEIGHT, 360)

I just had to tell CV the correct width and height of the camera.