recorder.sh

#!/usr/bin/env bash
#
# Source:
#   https://gitlab.com/gaugek/dots/
#

dir="$HOME/Videos/recordings"
name="$(date '+%Y-%m-%d.%H:%M:%S')" # Needs .mp4 after this is listed in the actual recording part

re="\e[31m"
gr="\e[32m"
ye="\e[33m"
cy="\e[36m"
bl="\e[34m"
pu="\e[35m"
n="\e[0m"
b="\e[1m"

help="
Gauge Krahe's ${ye}(https://gitlab.com/gaugek)${n} ffmpeg recording script
${b}CLI Syntax: ${n} 
  ${ye}\$${n} ${gr}record ${bl}<Offset X> <Offset Y> <Width> <Height> <Frames Per Second> <Desktop audio (yes|no)>${n}
When ran without any arguments (Or with missing arguments), it will get the (missing) options with dmenu
${b}CLI Arguments:  ${n}
  ${b}-h / --help:    ${n}  Displays what you are viewing right now
  ${b}-d / --display: ${n}  Record selected display
  ${b}-s / --slop:    ${n}  Use slop to get region to record
  ${b}-n / --no-nvenc:${n}  Disable nvenc (for nvidia cards)
"

[[ -d $dir ]] || mkdir -p $dir

opts=`getopt -o d:smhn --long display:,slop,manual,help,no-nvenc -- "$@"`
eval set -- "$opts"

while true ; do
    case "$1" in
        -d|--display) [[ -n $2 ]] && DoM="Display" && display_select="$2"; shift 2;;
        -s|--slop) DoM="Slop" ; shift 1;;
        -m|--manual) DoM="Manual"; shift 1;;
		-h|--help) echo -e "$help"; exit ;;
		-n|--no-nvenc) nvenc=" "; shift 1;;
		--) shift; break;;
    esac
done

if   [[ -z $1 ]] && [[ -z $DoM ]]; then
    DoM="$(echo -e "Display\nManual\nSlop" | dmenu -i -p "Automatic dimensions from display, Manual dimensions, or select a region?")"
elif [[ -n $1 ]] && [[ -z $DoM ]]; then
    DoM="Manual"
fi

if [[ ${DoM} = Display ]]; then
	displays="$(xrandr -q --current | grep -iv "   \|disconnect\|screen" | awk '{gsub("primary ", "");print $1 " " $3}')"
	if [[ -z $display_select ]]; then 
		display_select="$(echo -e "$displays" | awk '{print $2}' | dmenu -i -p "Display to record")"
	fi
    display_res="$(echo -e "$displays" | grep -i $display_select | awk '{gsub("x", " "); gsub("+", " ");  print $2 " " $3 " " $4 " " $5}' )"
    
    width="$(echo   $display_res | awk '{print $1}' )"
    height="$(echo  $display_res | awk '{print $2}' )"
    offsetX="$(echo $display_res | awk '{print $3}' )"
    offsetY="$(echo $display_res | awk '{print $4}' )"
    rate="$(echo -e "30\n60"     | dmenu -i -p "Framerate")"
    audio="$(echo -e "no\nyes"   | dmenu -i -p "Desktop audio?")"
elif [[ ${DoM} = Slop ]]; then
    slop="$(slop)"
    slop1="$(echo $slop | awk '{ gsub("x", " "); gsub("+", " "); print}')"

    width="$(echo   $slop1 | awk '{print $1}' )"
    height="$(echo  $slop1 | awk '{print $2}' )"
    offsetX="$(echo $slop1 | awk '{print $3}' )"
    offsetY="$(echo $slop1 | awk '{print $4}' )"
    rate="$(echo -e "30\n60"     | dmenu -i -p "Framerate")"
    audio="$(echo -e "no\nyes"   | dmenu -i -p "Desktop audio?")"
elif [[ ${DoM} = Manual ]]; then
    [ -n "$1" ] && offsetX="$1" || offsetX="$(echo -e "1440\n0" | dmenu -i -p "Offset for the X axis")"
    [ -n "$2" ] && offsetY="$2" || offsetY="$(echo -e "0" | dmenu -i -p "Offset for the Y axis")"
    [ -n "$3" ] && width="$3"   || width="$(echo -e "1920\n1366\n1440" | dmenu -i -p "Width")"
    [ -n "$4" ] && height="$4"  || height="$(echo -e "1080\n768\n900" | dmenu -i -p "Height")"
    [ -n "$5" ] && rate="$5"    || rate="$(echo -e "30\n60" | dmenu -i -p "Framerate")"
    [ -n "$6" ] && audio="$6"   || audio="$(echo -e "no\nyes" | dmenu -i -p "Desktop audio?")"
fi

if [[ $audio = yes ]]; then 
    audio="-f pulse -i `pacmd list-sources | grep -PB 1 "analog.*monitor>" | head -n 1 | sed 's/.* //g'`"
else
    audio=""
fi

RtR="$(echo -e "No\nYes" | dmenu -i -p "Are you ready to record?")"

[[ -n $(lspci | grep -i nvidia) ]] && [[ -z $nvenc ]] && nvenc="-vcodec h264_nvenc"

if [[ $RtR = Yes ]]; then 
    notify-send -t 2000 "recording started"

    ffmpeg   -y $(printf " $audio") \
        -f x11grab -draw_mouse 1 \
        -s ${width}x${height} -r ${rate} -i :0.0+${offsetX},${offsetY} \
        -qscale 0 $(printf " $nvenc") \
        "${dir}/${name}".mp4 
fi