python - OpenCV 视频输出图像未显示

Question

import numpy as np
import cv2

cap = cv2.VideoCapture(0)

while(True):
    # Capture frame-by-frame
    ret, frame = cap.read()

    cv2.imshow('frame',frame)

为什么相机预览未显示在输出屏幕/帧上？

这是输出的屏幕截图

标签： pythonpython-2.7opencv

Answer 1

尝试这个

import numpy as np
import cv2

cap = cv2.VideoCapture(0)

x = 0
while True:
    ret, frame = cap.read()

    cv2.imshow('frame',frame)

    if cv2.waitKey(1) == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()