CODEWITHSUNDEEP
pythonopencv
Deep
Deep

Reputation: 51

Not receving continous frame from opencv

my function did not return continuous frame ,it return only signal frame and then break here is my code:

import cv2
import numpy as np 
def video():
    cam=cv2.VideoCapture(0)
    while cam.isOpened:
        _,frame=cam.read()
        return frame

im=video()
cv2.imshow("image",im)
cv2.waitKey(0)

I want such function ,when i call this function ,anywhere in my code it return a continues frame and i do stuff on it whatever display ,face detection or other stuff

Upvotes: 0

Views: 228

Answers (2)

Mailerdaimon
Mailerdaimon

Reputation: 6080

Try to gather the frames in a while loop without breaking it by returning:

import cv2
import numpy as np 

def video(cam):     
    _,frame=cam.read()
    return frame

cam=cv2.VideoCapture(0)
while cam.isOpened:
    im=video(cam)
    cv2.imshow("image",im)
    cv2.waitKey(0)

Upvotes: 1

Ha Bom
Ha Bom

Reputation: 2917

When you return, you just exit the while loop, so it just shows 1 image.

import cv2
import numpy as np 

cam=cv2.VideoCapture(0)
while cam.isOpened:
    _,frame=cam.read()

    cv2.imshow("image",frame)

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

cap.release()
cv2.destroyAllWindows()

Upvotes: 0

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