前引

由于在对移动的人体进行拍照的效果并不好，所以对抓拍图片版进行了升级，通过人体红外感应器在来访人员进入房间后录制视频，视频能比较好的看清来访人员起到看家的作用。

拍照版

代码

import RPi.GPIO as GPIO  ##引入GPIO模块
import time
from picamera2 import Picamera2, Preview
from picamera2.encoders import H264Encoder
from picamera2.outputs import FfmpegOutput

def video():
    now = time.strftime("%Y%m%d%H%M%S",time.localtime(time.time())) 
    file_name="/Disk/MyCloud/Safe/"+now+".mp4"
    picam2 = Picamera2()
    video_config = picam2.create_video_configuration()
    picam2.configure(video_config)

    encoder = H264Encoder(10000000)
    output = FfmpegOutput(file_name)

    picam2.start_recording(encoder, output)
    time.sleep(5)
    picam2.stop_recording()
    picam2.close()
  
HC_Pin = 18 

GPIO.setmode(GPIO.BCM)
GPIO.setup(HC_Pin, GPIO.IN)

while True:
    if(GPIO.input(HC_Pin)):
        now = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time()))
        f = open('/home/zh/code/.log','a',encoding='utf-8')
        try:
            video()
        except:
            str=now+'    相机调用失败\n'
            f.writelines(str)       
        finally:
            str=now+"    有人来访\n"
            f.writelines(str)
            f.close()
    time.sleep(1)