#!/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='mVLeysJ-sx4'

# 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 00:03:57 -i "${SRC_FILE}" -vn -acodec copy "1. Midnight City Centre.${FILE_EXT}"
ffmpeg -ss 00:03:57 -to 00:07:16 -i "${SRC_FILE}" -vn -acodec copy "2. Aether World.${FILE_EXT}"
ffmpeg -ss 00:07:16 -to 00:10:40 -i "${SRC_FILE}" -vn -acodec copy "3. Waterway (ft. sv1)..${FILE_EXT}"
ffmpeg -ss 00:10:40 -to 00:14:05 -i "${SRC_FILE}" -vn -acodec copy "4. Saturn Skyline.${FILE_EXT}"
ffmpeg -ss 00:14:05 -to 00:19:13 -i "${SRC_FILE}" -vn -acodec copy "5. Gamma Hill Zone.${FILE_EXT}"
ffmpeg -ss 00:19:13 -to 00:22:01 -i "${SRC_FILE}" -vn -acodec copy "6. Distant Shore (ft. UNIT KAI).${FILE_EXT}"
ffmpeg -ss 00:22:01 -to 00:24:47 -i "${SRC_FILE}" -vn -acodec copy "7. Frame Runner (ft. bloodworth).${FILE_EXT}"
ffmpeg -ss 00:24:47 -to 00:28:13 -i "${SRC_FILE}" -vn -acodec copy "8. Heaven Sense (bonus).${FILE_EXT}"