PiLapse - Python script to take timelapse

pilapse.py

#!/usr/bin/python
import os
import time
import subprocess
from time import sleep
import random


# Configuration 

sleepDurationInSeconds = 15
checkDiskSpaceEveryImage = 20

rand = random.randint(0,10000)
# "echo \"SEQ-$RANDOM-$(ls | wc -l)-\""
numFiles = subprocess.check_output("echo $(ls | wc -l)", shell=True)


randPrefix = "SEQ-"+str(rand)+"-"+str(numFiles).strip()


imgSeq = 0
shouldAbort = False

print "Timelapse started. Capture image every "+str(sleepDurationInSeconds)+" sec. Check Free Space every "+str(checkDiskSpaceEveryImage)+" images."

while (shouldAbort != True):
    # Every x seconds
    sleep(sleepDurationInSeconds)
    ts = time.strftime("%Y%m%d%H%M%S")
    imgName = randPrefix+"-"+str(imgSeq)+"-"+ts
    print imgName

    os.system("raspistill -t 2000 -n -q 100 -vf -hf -w 1440 -h 1080 -o "+imgName+".jpg")

    imgSeq += 1
    # Quit after x images
    # if (imgSeq > 10):
    #     shouldAbort = True


    # Check freespace every x seconds
    if (imgSeq % checkDiskSpaceEveryImage == 0):
        dfOut = subprocess.check_output("df | grep root| awk '{print $4}'", shell=True)
        freespace = int(dfOut.strip())
        # less than 1G
        if (freespace < 1000000):
            print "Low on space, exiting timelapse"
            shouldAbort = True

print "Timelapse completed."

I'm aware of built-in raspistill -t 30000 -tl 2000 -o image%04d.jpg

I wrote this script, because I need to manage the quality -q and W x H which -tl flag does not support.

Files were later copied to mac, batch renamed later as

• image0.jpg
• image1.jpg
• ...
• image100.jpg

And used the following command to convert to video

avconv -r 10 -i image%d.jpg -r 10 -vcodec libx264 -vf scale=1440:1080 timelapse.mp4