lapse.sh

#!/bin/bash
set -e

rawdir="$1"
[ -z "$rawdir" ] && echo "missing dir" && exit

dir=$(cd "$rawdir" && pwd)
tmp=$(mktemp -d)

(
	cd "$tmp"
	ffmpeg -f v4l2 -s 640x480 -ss 00:00:3 -i /dev/video0 -vframes 1 -qscale:v 2 webcam.jpg
	scrot -q 1 desktop.png

	# composite
	gm composite -gravity SouthEast -geometry +10+10 webcam.jpg desktop.png composite.png

	ts=$(date +%s)
	cp composite.png "$dir/$ts.png"
	echo "Wrote " "$dir/$ts.png"
)

rm -r "$tmp"