播放视频后 OpenCV/Python 崩溃 [英] OpenCV/Python crashes after playing a video

问题描述

我将通过教程来学习 OpenCV.我有一个问题.当我运行此代码时:

I am going thru the tutorials to learn OpenCV. And I have a problem. When I run this code:

import cv2
cap = cv2.VideoCapture('C:\Users\wg\174037210.avi')
while(cap.isOpened()):
    ret, frame = cap.read()
    cv2.imshow('Video', frame)
    if cv2.waitKey(75) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

这是普通的视频显示代码，我在视频结束后收到此错误:

which is plain vanilla video display code I get this error after the video finishes:

回溯(最近一次调用最后一次):文件C:/Users/wg/python/video-test.py"，第 15 行，在cv2.imshow('Video', frame) cv2.error: OpenCV(3.4.3)C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:356:错误: (-215:Assertion failed) size.width>0 &&尺寸.高度>0 英寸函数 'cv::imshow'

Traceback (most recent call last): File "C:/Users/wg/python/video-test.py", line 15, in cv2.imshow('Video', frame) cv2.error: OpenCV(3.4.3) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:356: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'

环境如下:
Windows 7 专业版
Python 3.6.5
OpenCV 3.4.3

非常感谢任何帮助.谢谢！

Any help is greatly appreciated. Thanks!

推荐答案

试试这个:

import cv2

video = cv2.VideoCapture(filePath)   
frames_counter = 1

while True:
    frames_counter = frames_counter + 1
    check, frame = video.read()
    # print(frame)
    # print(check)
    if check:
        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
        cv2.imshow("Capturing", gray)
        key = cv2.waitKey(1)
    else:
        break

print("Number of frames in the video: ", frames_counter)
video.release()
cv2.destroyAllWindows()

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