#!/usr/bin/python
 import urllib
 import tempfile
 import shutil
 import subprocess
 import boto3
 import os

 def lambda_handler(event, context):
     tmpd = tempfile.mkdtemp()

     # fetch movie
     movie_url  = event['movie_url']
     movie_file = os.path.join(tmpd,
         os.path.basename(movie_url))
     urllib.urlretrieve(movie_url,movie_file)

     # motion analysis
     print subprocess.check_output([
         "bin/max-movement-lk.py",
         movie_file])

     # generate montage
     print subprocess.check_output([
         "bin/mk-montage.py",tmpd])

      # store montage in s3
     s3 = boto3.resource('s3')
     bucket = "snapshot.linux-magazin.de"
     data = open(os.path.join(
          tmpd,'montage.jpg')).read()
     s3.Bucket(bucket).put_object(
         Key="montage.jpg",
         Body=data,ContentType="image/jpeg")

     result = { "montage_url":
       "https://s3-us-west-2.amazonaws.com" +
       "/snapshot.linux-magazin.de/" +
       "montage.jpg"}

     shutil.rmtree(tmpd)
     return result