Raspberry pi wildlife camera script

camera.sh

#!/bin/bash

# any questions to my.name@gmail.com

TODAY=$(date +%Y%m%d)
START=${1}
HOURS=${2}

# how many ms to run
MS=$((3600 * ${HOURS} * 1000))

# how many ms between frames
RATE=1500

echo "Sleeping until ${START} then run ${MS} ms to ${TODAY}"

mkdir ${TODAY}
cd ${TODAY}

sleep $(( $(date -f - +%s- <<< "${START}"$'\nnow') 0 ))

raspistill -n -v -hf -vf -ex night -sa -100 -t ${MS} -tl ${RATE} \
           -l /home/pi/html/latest.jpg \
	   -w 1640 -h 820 -o ${TODAY}_%05d.jpg 2>&1 | tee camera.log

N=$(ls ${TODAY}_*.jpg | wc -l)

python3 ~/bin/movify.py ${TODAY}_%05d.jpg 1 ${N}

mv out.mp4 ${TODAY}.mp4