feat: add flac2opus_collection.bash
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caem
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README.md
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README.md
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# scripts
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This repository contains some of my scripts. Feel free to use, modify or share as you wish.
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Quality of the script and or code might or might not be questionable. I am not responsible
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for any accidental rimraffing of your home or any other directories nor for any other damage.
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## Index
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### `flac2opus_collection.bash`
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This script converts a copy of a directory containing `.flac` files and converts them all to opus.
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The source folder remains unmodified and the whole directory structure, including non-flac files, will
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be simply copied over to the output directory. This serves the purpose of being able to compress
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your whole lossless library to copy over to devices which are storage limited and or unable to playback
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the lossless files at a quality where they are distinguishable from the compressed files.
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#### Overview of arguments
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```
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arguments:
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in [input directory] (required) <The flac directory> {default: none}
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out [output directory] (required) <The opus directory> {default: none}
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verify [on/off] (optional) <Check converted files for corruption> {default: on}
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vbr [on/off] (optional) <Toggle variable bit rate> {default: on}
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bitrate [{bitrate}k] (optional) <Set the bitrate to be passed to ffmpeg> {default: 128k}
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```
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195
flac2opus_collection.bash
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flac2opus_collection.bash
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#!/usr/bin/env bash
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# This code is thrown together lazily to just work and never be touched again.
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# Do NOT try to learn from this piece of shit
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check_dep() {
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if [ -z "$(command -v "$1")" ]; then
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echo "'$1' is required but not installed."
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exit 1
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fi
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}
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check_deps() {
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deps=("ffmpeg" "opusinfo" "xargs")
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for dep in "${deps[@]}"; do
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check_dep "$dep"
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done
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}
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args() {
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while [ -n "$1" ];do
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case "$1" in
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"help")
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printf "\n\
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arguments:\n\
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in [input directory] (required) <The flac directory> {default: none}\n\
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out [output directory] (required) <The opus directory> {default: none}\n\
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verify [on/off] (optional) <Check converted files for corruption> {default: on}
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vbr [on/off] (optional) <Toggle variable bit rate> {default: on}
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bitrate [{bitrate}k] (optional) <Set the bitrate to be passed to ffmpeg> {default: 128k}\n\n"
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exit 0
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;;
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"in")
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if [ -z "$2" ]; then
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echo "option '$1' requires an additional argument."
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exit 1
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fi
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INPUT_DIR="$(realpath "$2")"
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shift
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;;
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"out")
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if [ -z "$2" ]; then
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echo "option '$1' requires an additional argument."
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exit 1
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fi
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OUTPUT_DIR="$(realpath "$2")"
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shift
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;;
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"vbr")
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if [ -z "$2" ]; then
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echo "option '$1' requires an additional argument."
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exit 1
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fi
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if [ "$2" != "on" ] && [ "$2" != "off" ]; then
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echo "Invalid option '$2' for $1. Only accepted options are 'on' or 'off'."
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exit 1
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fi
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VBR="$2"
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shift
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;;
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"verify")
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if [ -z "$2" ]; then
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echo "option '$1' requires an additional argument."
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exit 1
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fi
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if [ "$2" != "on" ] && [ "$2" != "off" ]; then
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echo "Invalid option '$2' for $1. Only accepted options are 'on' or 'off'."
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exit 1
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fi
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VERIFY="$2"
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shift
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;;
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"bitrate")
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if [ -z "$2" ]; then
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echo "option '$1' requires an additional argument."
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exit 1
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fi
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BITRATE="$2"
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if [[ ! $2 =~ ^[0-9]+k$ ]]; then
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echo "Invalid bitrate '$2', only accepts string matching pattern '[0-9]\\+k'"
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fi
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shift
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;;
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*)
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echo "Invalid argument '$1', skipping"
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;;
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esac
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shift
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done
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if [ -z "$INPUT_DIR" ]; then
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echo "Missing input directory"
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exit 1
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fi
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if [ -z "$OUTPUT_DIR" ]; then
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echo "Missing input directory"
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exit 1
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fi
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if [ -z "$BITRATE" ]; then
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BITRATE="128k"
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fi
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if [ -z "$VBR" ]; then
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VBR="on"
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fi
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if [ -z "$VERIFY" ]; then
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VERIFY="on"
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fi
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}
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get_total_count() {
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local -n ref_total_count="$2"
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total_count="$ref_total_count"
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local dir="$1"
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for item in "$dir"/*; do
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if [ -f "$item" ]; then
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new_file="${item/"$INPUT_DIR"/"$OUTPUT_DIR"}"
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new_file="${new_file/".flac"/".opus"}"
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if [ ! -f "$new_file" ] && [[ "$item" == *".flac" ]]; then
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((total_count+=1))
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elif [[ "$item" == *".flac" ]]; then
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if [ "$VERIFY" = "on" ]; then
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printf "Checking \e[93m'%s'\e[0m: " "$(basename "$new_file")"
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if ! opusinfo "$new_file" > /dev/null 2>&1; then
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((total_count+=1))
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printf "\e[31mbad\e[0m\n"
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rm "$new_file"
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else
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printf "\e[32mgood\e[0m\n"
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fi
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fi
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fi
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elif [ -d "$item" ]; then
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get_total_count "$item" "total_count"
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fi
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done
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}
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iterate_dirs() {
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local dir="$1"
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local conversions=()
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local -n ref_count="$2"
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local total_count="$3"
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count="$ref_count"
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for item in "$dir"/*; do
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item="${item/\$/"\\$"}"
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if [ -f "$item" ]; then
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new_file="${item/"$INPUT_DIR"/"$OUTPUT_DIR"}"
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new_file="${new_file/".flac"/".opus"}"
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if [ ! -f "$new_file" ]; then
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if [[ "$item" == *".flac" ]]; then
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((count+=1))
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conversions+=("printf '[%s/%s] \e[92m%s\e[0m -> \e[93m%s\e[0m\n' $count $total_count \
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\"$item\" \"$new_file\" && ffmpeg -hide_banner -loglevel error -i \"$item\" -vbr \"$VBR\" -b:a \"$BITRATE\" \"$new_file\" > /dev/null")
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else
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echo "Copied $(basename "$item")"
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cp -f "$item" "$new_file"
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fi
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fi
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elif [ -d "$item" ]; then
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new_dir="${item/"$INPUT_DIR"/"$OUTPUT_DIR"}"
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mkdir -p "$new_dir"
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iterate_dirs "$item" "count" "$total_count"
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fi
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done
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if [ ${#conversions[@]} -gt 0 ]; then
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printf '%s\0' "${conversions[@]}" | xargs -0 -P "$(nproc)" -I {} bash -c '{}'
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fi
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}
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main () {
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check_deps
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args "$@"
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count="0"
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total_count="0"
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get_total_count "$INPUT_DIR" "total_count"
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iterate_dirs "$INPUT_DIR" "count" "$total_count"
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}
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set -e
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main "$@"
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