python+open cv調用手機攝像頭，保存文件

  
1、android手機上安裝一款APP：IP攝像頭，app的圖片如上圖

2、調用代碼如下

import cv2

cv2.namedWindow("camera", 1)
# 開啟ip攝像頭
video = "http://admin:admin@192.168.31.97:8081/"  # 此處@后的ipv4 地址需要改為app提供的地址
cap = cv2.VideoCapture(video)
#　　開攝像頭
# while True:
#     # Start Camera, while true, camera will runq
#
#     ret, image_np = cap.read()
#
#     # Set height and width of webcamq
#     height = 600
#     width = 1000
#
#     # Set camera resolution and create a break function by pressing 'q'
#     cv2.imshow('object detection',image_np)# cv2.resize(image_np, (width, height)))
#     if cv2.waitKey(25) & 0xFF == ord('q'):
#         cap.release()
#         cv2.destroyAllWindows()
#         break
#     print(cap.get(cv2.cv2.CAP_PROP_FRAME_COUNT))
# # Clean up
# cap.release()
# cv2.destroyAllWindows()

#保存文件

fps = 30

size = (int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)), int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)))

# 調用VideoWrite（）函數
videoWrite = cv2.VideoWriter('MySaveVideo.avi', cv2.VideoWriter_fourcc('I', '4', '2', '0'), fps, size)

# 先獲取一幀，用來判斷是否成功調用攝像頭
success, frame = cap.read()

# 通過設置幀數來設置時間,減一是因為上面已經獲取過一幀了
numFrameRemainling = fps * 10 - 1

# 通過循環保存幀
while success and numFrameRemainling > 0:
    videoWrite.write(frame)
    success, frame = cap.read()
    numFrameRemainling -= 1

# 釋放攝像頭
cap.release()