#!/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='9uL2yqwvQNM'

# 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 00:04:00 -i "${SRC_FILE}" -vn -acodec copy "01. 悲しみよこんにちは.${FILE_EXT}"
ffmpeg -ss 00:04:00 -to 00:08:30 -i "${SRC_FILE}" -vn -acodec copy "02. あした晴れるか.${FILE_EXT}"
ffmpeg -ss 00:08:30 -to 00:12:25 -i "${SRC_FILE}" -vn -acodec copy "03. シ・ネ・マ.${FILE_EXT}"
ffmpeg -ss 00:12:25 -to 00:16:05 -i "${SRC_FILE}" -vn -acodec copy "04. Alone Again.${FILE_EXT}"
ffmpeg -ss 00:16:05 -to 00:18:45 -i "${SRC_FILE}" -vn -acodec copy "05. Get Down.${FILE_EXT}"
ffmpeg -ss 00:18:45 -to 00:21:22 -i "${SRC_FILE}" -vn -acodec copy "06. 好きさ.${FILE_EXT}"
ffmpeg -ss 00:21:22 -to 00:25:34 -i "${SRC_FILE}" -vn -acodec copy "07. ファンタジー.${FILE_EXT}"
ffmpeg -ss 00:25:34 -to 00:29:22 -i "${SRC_FILE}" -vn -acodec copy "08. サニーシャイニーモーニング.${FILE_EXT}"
ffmpeg -ss 00:29:22 -to 00:33:42 -i "${SRC_FILE}" -vn -acodec copy "09. サヨナラの素描(デッサン).${FILE_EXT}"
ffmpeg -ss 00:33:42 -to 00:37:44 -i "${SRC_FILE}" -vn -acodec copy "10. 陽だまり.${FILE_EXT}"
ffmpeg -ss 00:37:44 -to 00:42:17 -i "${SRC_FILE}" -vn -acodec copy "11. ビギン・ザ・ナイト.${FILE_EXT}"
ffmpeg -ss 00:42:17 -to 00:46:43 -i "${SRC_FILE}" -vn -acodec copy "12. 予感.${FILE_EXT}"
ffmpeg -ss 00:46:43 -to 00:50:35 -i "${SRC_FILE}" -vn -acodec copy "13. 夢の入口へ.${FILE_EXT}"