Python Script to start the recording using Picamara in Rasoberry Pi

Hii guys....
       Today I'm going to write a python script to start the video recording in Picamera Using RaspberryPi..
        For that You the following equpiment You need to integtare with raspberry pi..
       

• PiCamera Connected to raspberry pi
• Pir Sensor module connected to GPIO Pin  to raspbeery Pi
• 5V Rapberry Pi Charger

Now, Here I am going to write the python script to start recording :

import RPi.GPIO as GPIO

import time

import picamera

import datetime  # new

def get_file_name():  # new

    return datetime.datetime.now().strftime("%Y-%m-%d_%H.%M.%S.h264")

sensor = 4

GPIO.setmode(GPIO.BCM)

GPIO.setup(sensor, GPIO.IN, GPIO.PUD_DOWN)

previous_state = False

current_state = False

cam = picamera.PiCamera()

while True:

    time.sleep(0.1)

    previous_state = current_state

    current_state = GPIO.input(sensor)

    if current_state != previous_state:

        new_state = "HIGH" if current_state else "LOW"

        print("GPIO pin %s is %s" % (sensor, new_state))

        if current_state:

            fileName = get_file_name()  # new

            cam.start_preview()

            cam.start_recording(fileName)  # new

        else:

            cam.stop_preview()

            cam.stop_recording()  # new

by Executing this program You will get the .H264 Video file, which will save in the same folder of your python script. This file shows date as a file name..