webcam.py

# cv를 통한 라이브스트림 비디오 캡쳐 관련 레거시 코드
# https://docs.opencv.org/4.x/dd/d43/tutorial_py_video_display.html


## Capture Video from Camera ##

import cv2 as cv

def cv2_stream():
    cap = cv.VideoCapture(0)
    if not cap.isOpened():
        print("Cannot open camera")
        exit()
    while True:
        # Capture frame-by-frame
        ret, frame = cap.read()

        # if frame is read correctly ret is True
        if not ret:
            print("Can't receive frame (stream end?). Exiting ...")
            break
        # Our operations on the frame come here
        gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)
        # Display the resulting frame
        cv.imshow('frame', gray)
        if cv.waitKey(1) == ord('q'):
            break

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

if __name__ == "__main__":
    cv2_stream()