#!/bin/sh

# useful urls:
# https://github.com/LukeSmithxyz/voidrice/blob/master/.local/bin/dmenurecord
# https://wiki.archlinux.org/title/FFmpeg#Screen_capture
# https://trac.ffmpeg.org/wiki/Capture/Desktop

infofile="/tmp/recoinfo"
recodir="$XDG_VIDEOS_DIR/recordings/"
mkdir -p "$recodir"

if [ -e "$infofile" ]; then
	read -r pid tmpfile < "$infofile"
	kill "$pid"
	notify-send 'finish recording, start converting'
	ffmpeg -i "$tmpfile" "$recodir/$(time.uuid).mkv"
	notify-send 'finish converting'
	rm "$tmpfile" "$infofile"
else
	tmpfile="$(mktemp --suffix '.mkv')"
	notify-send 'start recording'
	# arch wiki way, no audio, less cpu use during capturing (fast?), large file size, need convert afterward
	xrectsel '%w %h %x %y' | xargs sh -c 'ffmpeg -y -loglevel quiet -f x11grab -framerate 25 -s "$2"x"$3" -i "$DISPLAY+$4,$5" -c:v ffvhuff "$1" & echo $!' shell "$tmpfile" | xargs -I {} printf '%s\t%s' '{}' "$tmpfile" > "$infofile"
	# another way to get subshell ffmpeg child pid
	#xrectsel '%w %h %x %y' | xargs sh -c 'ffmpeg -y -f x11grab -framerate 25 -s "$2"x"$3" -i "$DISPLAY+$4,$5" -c:v ffvhuff "$1"' shell "$tmpfile" &
	#printf '%s\t%s' "$(ps -o pid= --ppid $!)" "$tmpfile" > "$infofile"
fi