two_camera 2

Author: makelove

ch05-视频/two_camera.py

@@ -9,6 +9,7 @@
 """
 
 import cv2
+import numpy as np
 
 cap0 = cv2.VideoCapture(0)
 cap1 = cv2.VideoCapture(1)
@@ -18,14 +19,17 @@
 ret = cap1.set(4, 240)
 
 while cap0.isOpened() and cap1.isOpened():
-    ret, frame0 = cap0.read()
-    ret, frame1 = cap1.read()
+    ret0, frame0 = cap0.read()
+    ret1, frame1 = cap1.read()
 
-    cv2.imshow('frame0', frame0)
-    cv2.imshow('frame1', frame1)
-    cv2.moveWindow('frame1', x=frame0.shape[1], y=0)
+    if ret0:
+        cv2.imshow('frame0', frame0)
+    if ret1:
+        cv2.imshow('frame1', frame1)
+        # cv2.moveWindow('frame1', x=frame0.shape[1], y=0)
+        cv2.moveWindow('frame1', x=240, y=0)
 
-    key = cv2.waitKey(delay=10)
+    key = cv2.waitKey(delay=2)
     if key == ord("q"):
         break