WinPython and OpenCV

Question

I use WinPython to write my python programs. I need to solve the task of detecting faces in a video stream. I have installed opencv-python to WinPython using this command:

pip install opencv-python==3.4.0.12

When I run the following code, I get a False:

import numpy as np
import cv2
cap = cv2.VideoCapture(0)
ret, img = cap.read()
print(ret)

What I am doing wrong?

Answer 1

Seems like legit function result. As you can see, from documentation VideoCapture::read function returns retval and image, in case there was image to return. Apparently, "False" value of the ret variable in your code means that there was no image.

Edit:

I looked up documentation and here's what i've found:

"If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the methods return false and the functions return NULL pointer."