Southpark Downloader (with german and english audio) - Uses youtube-dl and ffmpeg

southpark-download.sh

#!/bin/bash
#
# ARG_POSITIONAL_SINGLE([season],[Season],[])
# ARG_POSITIONAL_SINGLE([episode],[Episode],[])
# ARG_OPTIONAL_BOOLEAN([keep],[k],[Prevents program to delete temporary files])
# ARG_HELP([The general script's help msg])
# ARGBASH_GO()
# needed because of Argbash --> m4_ignore([
### START OF CODE GENERATED BY Argbash v2.8.1 one line above ###
# Argbash is a bash code generator used to get arguments parsing right.
# Argbash is FREE SOFTWARE, see https://argbash.io for more info
# Generated online by https://argbash.io/generate


die()
{
	local _ret=$2
	test -n "$_ret" || _ret=1
	test "$_PRINT_HELP" = yes && print_help >&2
	echo "$1" >&2
	exit ${_ret}
}


begins_with_short_option()
{
	local first_option all_short_options='kh'
	first_option="${1:0:1}"
	test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0
}

# THE DEFAULTS INITIALIZATION - POSITIONALS
_positionals=()
# THE DEFAULTS INITIALIZATION - OPTIONALS
_arg_keep="off"


print_help()
{
	printf '%s\n' "The general script's help msg"
	printf 'Usage: %s [-k|--(no-)keep] [-h|--help] <season> <episode>\n' "$0"
	printf '\t%s\n' "<season>: Season"
	printf '\t%s\n' "<episode>: Episode"
	printf '\t%s\n' "-k, --keep, --no-keep: Prevents program to delete temporary files (off by default)"
	printf '\t%s\n' "-h, --help: Prints help"
}


parse_commandline()
{
	_positionals_count=0
	while test $# -gt 0
	do
		_key="$1"
		case "$_key" in
			-k|--no-keep|--keep)
				_arg_keep="on"
				test "${1:0:5}" = "--no-" && _arg_keep="off"
				;;
			-k*)
				_arg_keep="on"
				_next="${_key##-k}"
				if test -n "$_next" -a "$_next" != "$_key"
				then
					{ begins_with_short_option "$_next" && shift && set -- "-k" "-${_next}" "$@"; } || die "The short option '$_key' can't be decomposed to ${_key:0:2} and -${_key:2}, because ${_key:0:2} doesn't accept value and '-${_key:2:1}' doesn't correspond to a short option."
				fi
				;;
			-h|--help)
				print_help
				exit 0
				;;
			-h*)
				print_help
				exit 0
				;;
			*)
				_last_positional="$1"
				_positionals+=("$_last_positional")
				_positionals_count=$((_positionals_count + 1))
				;;
		esac
		shift
	done
}


handle_passed_args_count()
{
	local _required_args_string="'season' and 'episode'"
	test "${_positionals_count}" -ge 2 || _PRINT_HELP=yes die "FATAL ERROR: Not enough positional arguments - we require exactly 2 (namely: $_required_args_string), but got only ${_positionals_count}." 1
	test "${_positionals_count}" -le 2 || _PRINT_HELP=yes die "FATAL ERROR: There were spurious positional arguments --- we expect exactly 2 (namely: $_required_args_string), but got ${_positionals_count} (the last one was: '${_last_positional}')." 1
}


assign_positional_args()
{
	local _positional_name _shift_for=$1
	_positional_names="_arg_season _arg_episode "

	shift "$_shift_for"
	for _positional_name in ${_positional_names}
	do
		test $# -gt 0 || break
		eval "$_positional_name=\${1}" || die "Error during argument parsing, possibly an Argbash bug." 1
		shift
	done
}

parse_commandline "$@"
handle_passed_args_count
assign_positional_args 1 "${_positionals[@]}"

# OTHER STUFF GENERATED BY Argbash

### END OF CODE GENERATED BY Argbash (sortof) ### ])
# [ <-- needed because of Argbash


# Give season and episode with two digits
season=$(printf "%02d" "$_arg_season")
episode=$(printf "%02d" "$_arg_episode")

seasonName="Season $season"
episodeName="Episode ${episode}"
folder="$seasonName/$episodeName"

mkdir -p "$folder"
(
    cd "$folder"

    episodeFile="$episodeName.mp4"
    trackFile="Episode ${episode}_english.m4a"

    printf "Download video and german audio..."
    youtube-dl -q --restrict-filenames "http://www.southpark.de/alle-episoden/s${season}e${episode}"
    ffmpeg -hide_banner -loglevel error -f concat -safe 0 -i <(find . -type f -name '*.mp4' -printf "file '$PWD/%p'\n" | sort) -c copy "${episodeName}_german.mp4"
    printf "\rDownloaded video and german audio. \n"

    printf "Download english audio..."
    youtube-dl -q --restrict-filenames -k -x --geo-bypass "http://southpark.cc.com/full-episodes/s${season}e${episode}"
    ffmpeg -hide_banner -loglevel error -f concat -safe 0 -i <(find . -type f -name '*.m4a' -printf "file '$PWD/%p'\n" | sort) -c copy "$trackFile"
	  printf "\rDownloaded english audio. \n" 

    # Add english audio to video
    ffmpeg -hide_banner -loglevel error -i "${episodeName}_german.mp4" -i "$trackFile" -codec copy -map 0:v:0 -map 0:a:0 -map 1:0 -shortest "../$episodeFile"

	  # Normalize
    #printf "Normalize audio..."
	  #ffmpeg-normalize "$episodeFile" -o "../$episodeFile" -c:a copy
	  #printf "\rNormalized audio.  \n"
)

# Remove subfolder
if [ "$_arg_keep" = "off" ]; then
	(
		cd "$seasonName"

		rm -r "$episodeName"
	)
fi

# ] <-- needed because of Argbash