Python 调用海康威视摄像头显示预览画面

本文最后更新于：2024年5月23日下午

本文记录Python 调用海康威视摄像头，开启预览画面的方法。

准备工作

安装好 Python ， Opencv-python
配置测试机与摄像头 IP，二者在同一个网段

rtsp

支持 RTSP（Runtime Stream Protocol）协议的摄像头可以很方便地用 opencv i调用

#coding=utf-8
import cv2

ip_str = '192.168.1.64'
rtsp_port = '554'

url = "rtsp://admin:password@" + ip_str + ":" + rtsp_port + "/Streaming/Channels/2"
cap = cv2.VideoCapture(url)
ret,frame = cap.read()
while ret:
    ret,frame = cap.read()
    cv2.imshow("frame",frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
 
cv2.destroyAllWindows()
cap.release()

hikvisionapi

也可以用第三方 API 实现，不过这个 API 文档写的不好，网上资料也不多，我勉强搞了个能显示模糊图像的：

# 导入必要的库
import cv2
from hikvisionapi import Client
import numpy as np
import io
from PIL import Image
 
def string_to_image(string, width, height):
    image = Image.frombytes('RGB', (width, height), string)
    return image

# 连接到摄像头
cam_ip = 'http://192.168.1.64'
cam_username = 'admin'
cam_password = 'password'
cam = Client(cam_ip, cam_username, cam_password)


# Dict response (default)
response = cam.System.deviceInfo(method='get')

# 打印设备的信息
print(response)


cam.Streaming.channels[101]

while True:
    response = cam.Streaming.channels[101].picture(method='get', type='opaque_data')
    response2 = cam.Streaming.channels[101].picture_url
    data = response.iter_content(chunk_size=999999)
    for chunk in data:
        image = Image.open(io.BytesIO(chunk))
        cv2.imshow('Video Stream', np.array(image))
        
        # 按下q键退出循环
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break