一、出问题的代码
import numpy as np
import cv2
cap = cv2.VideoCapture(0) # 摄像头编号。
# Define the codec and create VideoWriter object
fourcc = cv2.VideoWriter_fourcc(*'XVID') # 注意编码器
out = cv2.VideoWriter('output3.avi', fourcc, 20.0, (640, 480))
while cap.isOpened():
ret, frame = cap.read()
if ret:
# 根据y轴对称
frame = cv2.flip(frame, 1)
# write the flipped frame
out.write(frame)
cv2.imshow('frame', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# Release everything if job is finished
cap.release()
out.release()
cv2.destroyAllWindows()
二、解决办法
解决办法一：
将第三行 cap = cv2.VideoCapture(0)改为
cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
解决办法二：
windows 下：在命令行中输入：
setx OPENCV_VIDEOIO_PRIORITY_MSMF 0
三、参考
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