screenrecord

#!/bin/bash

print_help()
{
	echo "Usage: $(basename "$0") [options] [output_file]"
	echo "Screen records with ffmpeg using the x11grab backend"
	echo ""
	echo "Example: $0 -s 1920x1080 -r 60 -o 128,0 -f ./video.mkv"
	echo ""
	echo "Required options:"
	echo "  -s    Output resolution"
	echo "  -r    Output FPS / refreshrate"
	echo "  -f    Output file path"
	echo ""
	echo "Option options:"
	echo "  -o    Recording position offset from the top left corner of the left-most screen"
	echo "  -a    Audio source (something from 'pactl get-default-sink')"
}

start_recording()
{
	ffmpeg -video_size "$RESOLUTION" -framerate "$FPS" -f x11grab -i :0.0+"$OFFSET" -f pulse -ac 2 -i "$AUDIO_SOURCE" -c:v libx264 -preset ultrafast -qp 17 -vf format=yuv420p "$OUTPUT"
}

# If there were no args specified, simply print the help page
[ $# -eq 0 ] && print_help

# Set default values for optional arguments
OFFSET="0,0"
AUDIO_SOURCE="$(pactl get-default-sink).monitor"

# Handle script arguments
while test $# -gt 0; do
	case $1 in
		-s)
			shift
			RESOLUTION="$1"
			shift
			;;

		-r)
			shift
			FPS="$1"
			shift
			;;

		-o)
			shift
			OFFSET="$1"
			shift
			;;

		-a)
			shift
			AUDIO_SOURCE="$1"
			shift
			;;

		-f)
			shift
			OUTPUT="$1"
			shift
			;;

		*)
			print_help
			exit 0
			;;
	esac
done

# Check if required args were set
[ -z "$RESOLUTION" ] && echo "Resolution was not specified" && exit 1
[ -z "$FPS" ] && echo "FPS was not specified" && exit 1
[ -z "$OUTPUT" ] && echo "Output path was not specified" && exit 1

start_recording