open cv close camera

Question

I am using OpenCv to capture image from webcam.

It works fine I just don't know how to close the camera.

from cv2 import *
# initialize the camera
cam = VideoCapture(0)   # 0 -> index of camera
s, img = cam.read()
if s:    # frame captured without any errors
    namedWindow("cam-test",CV_WINDOW_AUTOSIZE)
    imshow("cam-test",img)`
    waitKey(0)
    destroyWindow("cam-test")
    imwrite("testfilename.jpg",img) #save image
    cam.release

Your code is working fine. Camera is automatically closed once you press any key because you have used waitKey(0). can you elaborate your problem? — Jazz, Oct 19 '17 at 03:29
Thank you, the camera light was blinking even after the file was written. it would only go off when the python session was closed. — Akshay Kadidal, Oct 19 '17 at 04:05

score 14 · Accepted Answer · answered Oct 19 '17 at 02:23

14

I think you're just missing () at the end of cam.release

answered Oct 19 '17 at 02:23

trixr4kdz

324
2
12

score 0 · Answer 2 · edited May 27 '22 at 05:17

0

use below snippet

cap=cv2.VideoCapture(0) 
 
while True:
    ret,frame=cap.read()
    
    
    cv2.imshow("window",frame)
    if cv2.waitKey(0) & 0xFF==ord("q"):
        break

cv2.destroyAllWindows()

you can change the letter "q" to any other character and by pressing the "q" letter the video will stop

edited May 27 '22 at 05:17

Suraj Rao

29,388
11
94
103

answered May 27 '22 at 05:05

DIPTI_DJ_STACK

1

score -1 · Answer 3 · edited Jan 12 '18 at 17:06

-1

Change CV_WINDOW_AUTOSIZE to WINDOW_AUTOSIZE.

edited Jan 12 '18 at 17:06

Karol Selak

4,248
6
35
65

answered Jan 12 '18 at 16:05

RomeroCreator

1
1

open cv close camera

3 Answers3