gif recorder and converter

gif

#!/bin/bash

print_usage()
{
	cat <<EOF
$(basename $0) -- gif recorder and converter

Usage: $(basename $0) [-h] [-r] [-w] [-c] [time] [file]
	   -h to print this usage
	   -r to record a region
	   -w to record a window
	   -c to convert gif into png file

recorder: by default, if time and file argumetns are not given, time=10s and outout to ~/recorded.gif
EOF
	exit 0
}

# Sound notification to let one know when recording is about to start (and ends)
beep() {
	if [ -f /usr/share/sounds/KDE-Im-Irc-Event.ogg ]; then
		paplay /usr/share/sounds/KDE-Im-Irc-Event.ogg &
	fi
}

if [ -z "$DISPLAY" ]; then
	echo "Unable to use this tool in non-GUI environment!"
	exit
fi
DELAY=5 # Delay before starting
flag_r=0
flag_w=0
flag_c=0
while getopts ":hrwc" args; do # prefix-: no warning for illegal option
	case "$args" in
		h|\?)
			print_usage;;
		r)
			flag_r=1
			;;
		w)
			flag_w=1
			;;
		c)
			flag_c=1
			;;
	esac
done
shift $((OPTIND -1))            # remove options that have already been handled from $@

if [ "$flag_c" -eq 1 ]; then
	if ! hash mplayer 2>/dev/null; then
		echo "mplayer program is not installed!"
		exit 1
	fi
	# You can also convert gif to multiple png images
	# convert input.gif output%05d.png
	# Pause/Continue using SPACE key, Next frame using `.`
	gif 'mplayer -loop 0  -speed 0.2' $1
	exit 0
fi

if ! hash byzanz-record 2>/dev/null; then
	echo "byzanz-record program is not installed!"
	exit 1
fi

# Duration and output file
if [ $# -gt 0 ]; then
	D="--duration=$@"
else
	echo Default recording duration 10s to $HOME/recorded.gif
	D="--duration=10 $HOME/recorded.gif"
fi

if [ "$flag_r" -eq 1 ]; then
	# xrectsel from https://github.com/lolilolicon/xrectsel
	ARGUMENTS=$(xrectsel "--x=%x --y=%y --width=%w --height=%h") || exit -1

	echo Delaying $DELAY seconds. After that, byzanz will start
	for (( i=$DELAY; i>0; --i )) ; do
		echo $i
		sleep 1
	done
	beep
	byzanz-record --verbose --delay=0 ${ARGUMENTS} $D
	beep
	exit 0
fi

if [ "$flag_w" -eq 1 ]; then
	XWININFO=$(xwininfo)
	read X < <(awk -F: '/Absolute upper-left X/{print $2}' <<< "$XWININFO")
	read Y < <(awk -F: '/Absolute upper-left Y/{print $2}' <<< "$XWININFO")
	read W < <(awk -F: '/Width/{print $2}' <<< "$XWININFO")
	read H < <(awk -F: '/Height/{print $2}' <<< "$XWININFO")

	echo Delaying $DELAY seconds. After that, byzanz will start
	for (( i=$DELAY; i>0; --i )) ; do
		echo $i
		sleep 1
	done

	beep
	byzanz-record --verbose --delay=0 --x=$X --y=$Y --width=$W --height=$H $D
	beep
fi