rpi-timelapse.py

__author__ = 'agrimasthana'
import boto
import boto.s3
from boto.s3.key import Key
from picamera import PiCamera
from time import sleep
from os import system
import urllib2
import json
import arrow


def s3upload(filename, bucket):
    conn = boto.connect_s3('Did-you-really-think', 'I-would-check-this-in') #AWS credentials
    bucket = conn.get_bucket(bucket)
    k = Key(bucket, filename)
    k.key = filename
    with open(filename) as f:
        k.set_contents_from_file(f)
    print('Completed uploading {}'.format(filename))


def daylight():
    res = json.load(urllib2.urlopen('http://ip-api.com/json/'))
    lat = res['lat']
    lon = res['lon']
    tz = res['timezone']
    time = json.load(urllib2.urlopen('http://api.sunrise-sunset.org/json?lat=%s&lng=%s&formatted=0' % (lat, lon)))
    sunset = time['results']['sunset']
    sunrise = time['results']['sunrise']
    timespan = {'sunrise': arrow.get(sunrise).to(tz).timestamp,
                'sunset': arrow.get(sunset).to(tz).timestamp,
                'timezone': tz}
    return timespan

if __name__ == '__main__':
    imgs = raw_input('What should the captured series be called?: \n')
    bkt = raw_input('What S3 bucket are you using?: \n')
    camera = PiCamera()
    camera.vflip = True #This is because my camera is attached upside down.
    camera.resolution = (1920, 1080)
    dl = daylight()
    crnt = arrow.utcnow().to(dl['timezone']).timestamp
    dif = dl['sunset'] - crnt
    photostocapture = dif / 5 #It is suggested to take a photo every 3 seconds for sunset timelapse
    for i in range(photostocapture):
        camera.capture(imgs + '-{0:04d}.jpg'.format(i))
        sleep(1)
        s3upload(imgs + '-{0:04d}.jpg'.format(i), bkt)
        sleep(2)
    print('installing avconv library')
    system('sudo apt-get install libav-tools -y')
    print('Starting to process video')
    system('avconv -y -r 30 -i '+imgs+'-%4d.jpg -r 30 -vcodec libx264 '+imgs+'.mp4')
    print('uploading processed video to AWS: S3')
    s3upload(imgs+'.mp4')
    print('Done')