opencv VideoCapture.read()读取错误

Posted 2020-09-14 林幽独步

错误详情:

OpenCV Error: Assertion failed (size.width>0 && size.height>0) in cv::imshow, file ..\..\..\..\opencv\modules\highgui\src\window.cpp, line 261

源码:

import cv2 as cv
clicked = False
def onMouse(event,x,y,flags,param):
    global clicked
    if event == cv.EVENT_LBUTTONUP:
        clicked = True

capture = cv.VideoCapture(0)
capture.open(0)
success, frame = capture.read()
cv.namedWindow(‘mywin‘)
cv.setMouseCallback(‘mywin‘,onMouse)
while cv.waitKey(1)==-1 andnot clicked:
　　cv.imshow("mywin",frame)
　　success, frame = capture.read()
cv.destroyAllWindows()
capture.release()

在控制台敲入上面的命令就可以看到视频,debug也可以,就是直接运行不行,一直报上面的错误,success一直为false

找网上的资料,基本上是说release和debug时OpenCV执行的dll文件(opencv_ffmpeg.dll 32位)不同导致的,也不知道到哪去设置这玩意儿......

郁闷了很久,我想是不是视频设备需要延时,因为我在命令行上敲和在debug运行的时候都是在capture.open(0)这地方有逗留的,

所以就在下面加了行time.sleep(1)

点击运行,喔~成功了,这也是奇葩的坑...