Python通過cv2讀取多個(gè)USB攝像頭

import cv2

capture = cv2.VideoCapture(0)
# 打開自帶的攝像頭
if capture.isOpened():
 # 以下兩步設(shè)置顯示屏的寬高
 capture .set(cv2.CAP_PROP_FRAME_WIDTH, 640)
 capture .set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
 
 # 持續(xù)讀取攝像頭數(shù)據(jù)
 while True:
  read_code, frame = capture.read()
  if not read_code:
   break
  cv2.imshow("screen_title", frame)
  # 輸入 q 鍵，保存當(dāng)前畫面為圖片
  if cv2.waitKey(1) == ord('q'):
   # 設(shè)置圖片分辨率
   frame = cv2.resize(frame, (1920, 1080))
   cv2.imwrite('pic.jpg', frame)
   break
 # 釋放資源  
 capture.release()
 cv2.destroyWindow("screen_title")  

import cv2

capture = cv2.VideoCapture(0)
capture_usb = cv2.VideoCapture(1)
# 打開自帶的攝像頭
if capture.isOpened():
 if capture_usb.isOpened():
 # 以下設(shè)置顯示屏的寬高
 capture.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
 capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
 capture_usb.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
 capture_usb.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
 
 # 持續(xù)讀取攝像頭數(shù)據(jù)
 while True:
  read_code, frame = capture.read()
  read_code2, frame2 = capture_usb.read()
  if not read_code or not read_code2:
   break
  cv2.imshow("screen_title", frame)
  cv2.imshow("screen_title_usb", frame2)
  # 輸入 q 鍵，保存當(dāng)前畫面為圖片
  if cv2.waitKey(1) == ord('q'):
   # 設(shè)置圖片分辨率
   frame = cv2.resize(frame, (1920, 1080))
   cv2.imwrite('pic.jpg', frame)
   capture_usb.release()
   break
 # 釋放資源  
 capture.release()
 cv2.destroyWindow("screen_title")