cv2_multicap.py

#
# Adapted from https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_video_display/py_video_display.html#capture-video-from-camera
#

import numpy as np
import cv2

caps = [cv2.VideoCapture(i) for i in range(2)]  # open 2 camera feeds

while(True):
    for i, cap in enumerate(caps):
        # 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(f'frame {i}', gray)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

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