On Pi day, I bought a Raspberry Pi Camera Module V2 from Amazon so I could try out Amazon Rekognition, Google Video Intelligence API, and many other fun projects that utilize the camera. I finally opened the camera package yesterday and started playing with it. The first project was a simple one: take many still photos and create a time-lapse video. Here are the steps:
- Install the camera module.
- Set up the Pi and put the camera facing the window.
- Write the following Python program:
from picamera import PiCamera import time # Configs SUNRISE = 6 SUNSET = 20 LOCAL_TIME_UTC_OFFSET = -7 SAVE_PATH = "/home/pi/Projects/PiCam/photos/" TIME_GAP_IN_SECONDS = 300 def isDayTime(): hour = int(time.strftime("%H")) + LOCAL_TIME_UTC_OFFSET hour_local = hour if hour < 0: hour_local = hour + 24 return (hour_local >= SUNRISE and hour_local <= SUNSET) def start(): camera = PiCamera() camera.start_preview() while True: time.sleep(TIME_GAP_IN_SECONDS) if isDayTime(): now = time.strftime("%m%d%Y-%H%M") file_path = SAVE_PATH + now + ".jpg" camera.capture(file_path) print("Captured: " + file_path) else: print("Do not capture") camera.stop_preview() print("Program starts...") start()
Then just let it run in the background. Today, after sunset, I stopped the program and copied all the photos over to my Macbook, and used iMovie to create a time-lapse video.
That’s it! More camera projects to come!