user-data

#!/bin/bash
#update package sources
apt-get update
apt install -y awscli
apt-get install -y mencoder

#create directory for files and output
mkdir /vid
cd /vid

#download everything from S3 bucket
aws s3 cp --recursive s3://picamera-timelapse .

#horrible and overcomplicated way to sieve out undwanted pictures because I was too lazy to craft proper cron. List of files is placed into text file for memcoder as a reference
find . -size +1M -type f -exec ls {} + | grep -E "20170...-(05[3-5]|0[6-9].|1[0-9][0-2])...-image.jpg" | sort | cut -d '/' -f 2- > stills.txt

#I found that formula here: http://mariovalle.name/mencoder/mencoder.html
#adjusted for 60 FPS. 
#optimal_bitrate = (50 * fps * width * height) / 256
#output video will be saved in /vid
mencoder -nosound -ovc lavc -lavcopts vcodec=mpeg4:aspect=16/9:vbitrate=24300000 -vf scale=1920:1080 -o orange2.avi -mf type=jpeg:fps=60 mf://@stills.txt