#!/bin/bash

#                       __                __
#    ____ ___  ______  / /___  ____ _____/ /__  _____
#   / __ `/ / / / __ \/ / __ \/ __ `/ __  / _ \/ ___/
#  / /_/ / /_/ / / / / / /_/ / /_/ / /_/ /  __/ /
#  \__, /\__,_/_/ /_/_/\____/\__,_/\__,_/\___/_/
# /____/
# ---------------------------------------------------
# Author :: Miris /// GitHub :: MirisWisdom/Albumin
# ---------------------------------------------------

# This simple Bash script lets you download the video
# using yt-dlp, and then takes care of extracting its
# audio into a file for each song w/ ffmpeg!

# It does not re-encode or tag any of the audio files
# due to raw preservation being its purpose.

# You should run it line by line rather than blindly!
# Feel free to tweak & suggest improvements!

# ---------------------------------------------------

# We'll be using the ID for both file and directory.
VIDEO_ID='onZ4PM9PbVQ'

# Create and enter the new directory.
mkdir -p "${VIDEO_ID}" && cd "${VIDEO_ID}"

# Download the audio file using yt-dlp.
yt-dlp -x -f bestaudio "${VIDEO_ID}" -o "${VIDEO_ID}.%%(ext)s"

# Figure out the downloaded file name and extension.
SRC_FILE=$(ls "${VIDEO_ID}".*) # ls command should only output the downloaded file name!
FILE_EXT=${SRC_FILE:12}        # file id + dot = 12 characters; extension length varies!

ffmpeg -ss 00:00:00 -to 00:04:24 -i "${SRC_FILE}" -vn -acodec copy "01. M☆O☆S☆O乱舞 ～まかでみ・WAっしょい！より～.${FILE_EXT}"
ffmpeg -ss 00:04:24 -to 00:08:24 -i "${SRC_FILE}" -vn -acodec copy "02. 崖の上のポニョ ～崖の上のポニョ～ (赤い彗星 Mix).${FILE_EXT}"
ffmpeg -ss 00:08:24 -to 00:12:24 -i "${SRC_FILE}" -vn -acodec copy "03. 銀河鉄道999 ～銀河鉄道999より～.${FILE_EXT}"
ffmpeg -ss 00:12:24 -to 00:16:01 -i "${SRC_FILE}" -vn -acodec copy "04. ETERNAL BLAZE ～魔法少女リリカルなのはA’Sより～.${FILE_EXT}"
ffmpeg -ss 00:16:01 -to 00:19:47 -i "${SRC_FILE}" -vn -acodec copy "05. flower of bravery ～恋姫†無双より～.${FILE_EXT}"
ffmpeg -ss 00:23:55 -to 00:27:34 -i "${SRC_FILE}" -vn -acodec copy "07. 激動 ～D.GRAY-MANより～ (Pinpon Mix).${FILE_EXT}"
ffmpeg -ss 00:27:34 -to 00:32:02 -i "${SRC_FILE}" -vn -acodec copy "08. UNNAMED WORLD ～二十面相の娘より～ (NFPudding Mix).${FILE_EXT}"
ffmpeg -ss 00:32:02 -to 00:35:43 -i "${SRC_FILE}" -vn -acodec copy "09. やっぱり世界はあたし☆れじぇんど!! ～恋姫†無双より～.${FILE_EXT}"
ffmpeg -ss 00:35:43 -to 00:39:19 -i "${SRC_FILE}" -vn -acodec copy "10. ?でわっしょい ～ひだまりスケッチ×365より～ (NFPudding Mix).${FILE_EXT}"
ffmpeg -ss 00:39:19 -to 00:41:47 -i "${SRC_FILE}" -vn -acodec copy "11. 私の彼はパイロット ～超時空要塞マクロス より～ (Pinpon Mix).${FILE_EXT}"
ffmpeg -ss 00:41:47 -to 00:45:19 -i "${SRC_FILE}" -vn -acodec copy "12. TRICKSTER.${FILE_EXT}"
ffmpeg -ss 00:45:19 -to 00:48:37 -i "${SRC_FILE}" -vn -acodec copy "13. BLACK DIAMOND.${FILE_EXT}"
ffmpeg -ss 00:48:37 -to 00:53:20 -i "${SRC_FILE}" -vn -acodec copy "14. 続く世界 ～天元突破グレンラガン -紅蓮編-より～ (NFPudding Mix).${FILE_EXT}"
ffmpeg -ss 00:53:20 -to 00:58:15 -i "${SRC_FILE}" -vn -acodec copy "15. バンビーノ・バンビーナ.${FILE_EXT}"
ffmpeg -ss 00:19:47 -to 00:23:55 -i "${SRC_FILE}" -vn -acodec copy "06. MASSIVE WONDERS ～魔法少女リリカルなのはStrikerS～ (NFPudding Remix).${FILE_EXT}"