interval-ss.bash

#!/usr/bin/env bash

set -e

if [ "$#" -ne 2 ]; then
  echo "usage: ./script <dst> <duration (m)>"
  exit 1
fi

echo "start after 3 seconds"
sleep 3

dst=$1
duration=$2

mkdir -p "$dst"

num="$(expr $duration \* 60 / 5)"
echo $num
for i in $(seq 0 $num); do
  screencapture -m -T0 -x "$dst/$(date +%s).png"
  echo "captured $i"
  sleep 5
done