ytdl youtube-dl wrapper bash script

#!/bin/bash

StartDir=$(pwd)
ScriptName=$(realpath "$0")
ScriptDir=$(dirname "$ScriptName")

if ! [ -d "$ScriptDir/youtube-dl" ] ; then
	echo "Downloading youtube-dl to $ScriptDir"
	cd "$ScriptDir"
	if ! git clone https://github.com/ytdl-org/youtube-dl.git ; then
		exit 1
	fi
	cd "$StartDir"
fi

BidDir=$(cd "$ScriptDir/youtube-dl/bin" && pwd)

export PYTHONPATH=$(cd "$ScriptDir/youtube-dl" && pwd)
export PATH="$BidDir:$PATH"

if ! $(which AtomicParsley) ; then
	echo "sudo apt install atomicparsley"
	if ! sudo apt install atomicparsley ; then
		exit 1
	fi
fi

Scale=1
for Arg in "$@" ; do
	# echo "'$Arg'"
	if [ "$Arg" == --help ] || [ "$Arg" == -h ] ; then
		youtube-dl --help
		exit 0
	elif [[ "$Arg" =~ ^-[1-9][0-9]*$ ]] ; then
		Scale=${Arg:1}
	else
		YTDLArgs+=("$Arg")
	fi
done


ResNameContainer=$(mktemp /tmp/ytdl.XXXXXX)

youtube-dl \
	--ignore-errors \
	--all-subs \
	--embed-subs \
	--embed-thumbnail \
	--add-metadata \
	--verbose \
	--geo-bypass \
	-o "%(playlist_index)s-%(title)s.%(ext)s" \
	--format 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4' \
	--exec "echo {} > $ResNameContainer" \
	"${YTDLArgs[@]}" \
	;

ResName=$(cat "$ResNameContainer")

rm "$ResNameContainer"

if [ $Scale != 1 ] ; then
	ScaledResName="s${Scale}_${ResName}"

	ffmpeg \
		-i "$ResName" \
		-vf scale="iw/$Scale:ih/$Scale" \
		-y \
		"$ScaledResName" \
	;

fi