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i want to Connect Hikvision ip camera with python and open cv using this code :

import numpy as np
import cv2

cap = cv2.VideoCapture()
cap.open("rtsp://yourusername:yourpassword@172.16.30.248:555/Streaming/channels/2/")

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

    # Our operations on the frame come here
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Display the resulting frame
    cv2.imshow('frame',ret)

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()

when i run my code i got this Error :

    Traceback (most recent call last):
  File "C:\Users\Amin\Desktop\ip camera in py\csm.py", line 15, in <module>
    cv2.imshow('frame',ret)
cv2.error: OpenCV(4.0.0) c:\projects\opencv-python\opencv\modules\imgproc\src\color.hpp:261: error: (-2:Unspecified error) in function '__cdecl cv::CvtHelper<struct cv::Set<1,-1,-1>,struct cv::Set<3,4,-1>,struct cv::Set<0,2,5>,2>::CvtHelper(const class cv::_InputArray &,const class cv::_OutputArray &,int)'
> Unsupported depth of input image:
>     'VDepth::contains(depth)'
> where
>     'depth' is 6 (CV_64F)

i test my camera whit VLCPlayer and it work perfectly!

i think the problem refer to opencv4!

how can i fix it? tnx a lot

4

1 回答 1

5

错误是您在这里传递了一个BOOLEAN值而不是OpenCV 函数中的Mat值：imshow()

cv2.imshow('frame',ret)

所以你应该通过框架：

cv2.imshow('frame',frame)

cap.read()inPython返回两个值，一个是Boolean显示帧是否被成功读取，第二个是帧本身。所以你应该检查retif it is true，然后显示框架。

于 2019-03-03T16:28:59.093 回答