Fixed syntax and added documentation for the timelapse script from https://reps.cc/?p=85

cap.py

#!/usr/bin/env python
 
import numpy as np
import cv2
from skimage.measure import compare_ssim as ssim
import time

# Pick a source - either a file or a (exiting) device
cap = cv2.VideoCapture('/dev/video0')
 
ret,previous = cap.read()
best_frame = previous
number = 50
file = 0
 
while(True):
    i = 0
    best_s = 0
    while(i<=number):
        i += 1
        ret, frame = cap.read()
        s = ssim(frame, previous, multichannel=True)
        if(s > best_s):
            best_s = s
            best_frame = frame
    cv2.imwrite('folder/%04d.png' % file,best_frame)
    file += 1
    previous = best_frame
 
cap.release()
cv2.destroyAllWindows()

install-steps.sh

# Installing conda through Berryconda (https://github.com/jjhelmus/berryconda)
wget https://github.com/jjhelmus/berryconda/releases/download/v2.0.0/Berryconda3-2.0.0-Linux-armv7l.sh
chmod +x Berryconda3-2.0.0-Linux-armv7l.sh
./Berryconda3-2.0.0-Linux-armv7l.sh -b -f

# Install the prerequisites for the script above
conda install -c menpo opencv ffmpeg scikit-image

# Run the script as long as you have to
berryconda3/bin/python cap.py

# Rendering the timelapse video
ffmpeg -r 1 -i folder/%04d.png -c:v libx264  -vf "fps=50,setpts=0.25*PTS" -pix_fmt yuv420p  out.mp4