display_cams.py

#!/usr/bin/env python

import numpy as np
import cv2
import sys

ORIG_WIDTH = 160
ORIG_HEIGHT = 120
#ORIG_WIDTH = 1920
#ORIG_HEIGHT = 1080
RESIZE_WIDTH = 640
RESIZE_HEIGHT = 480

captures = []

for i in range(1, len(sys.argv)):
    temp = cv2.VideoCapture(int(sys.argv[i]))
    temp.set(cv2.CAP_PROP_FRAME_WIDTH, ORIG_WIDTH)
    temp.set(cv2.CAP_PROP_FRAME_HEIGHT, ORIG_HEIGHT)
    captures.append(temp)

while(True):
 
    frames = []

    for i in range(len(captures)):
        _, frame = captures[i].read()
	frames.append(cv2.resize(frame, (RESIZE_WIDTH,RESIZE_HEIGHT)))

    for i in range(len(frames)):
        cv2.imshow('cam ' + str(i) + ' ', frames[i])

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

for capture in captures:
    capture.release()

# When everything done, release the capture
#cap1.release()
#cap2.release()
cv2.destroyAllWindows()