If you're looking for a way to add replay gain tags to all of your music all at once, especially if your music collection consists of multiple file formats, this HOWTO will describe two ways to do it.
The first way is to use a program called Quod Libet (or its companion, Ex Falso). Recent versions of these programs feature an extension that can apply replaygain to large sets of files at once. However, the version in Jaunty is not recent enough to include this feature, and I don't think the version in Karmic is either. (Apparently, you can also use Foobar2000 in wine, but I haven't tried that.)
The second way is to use my script. I have a music collection in at least four different formats (mp3, ogg, flac, wavpack, maybe a handful of aac) and multiple sample rates, so I wrote this one script to replaygain them all. The script assumes that each directory is an album (for the purposes of album gain values), and it walks the whole directory tree starting from where you tell it. In each folder, it searches for every kind of music file that it knows about, and applies replay gain to all the ones that it finds. If it doesn't support your music format of choice, you can add it with two lines of code.
I have written a script to add replaygain tags to an entire collection of music files at once. I use it to apply replaygain to my whole music collection, or to any new files/albums I add to it. When run, the script will search recursively through an entire folder and all of its subfolders and will add replaygain data to all the music files of any known file type that it finds. The script assumes that each folder represents an album (for the purposes of calculating album gain).
To use it, copy the text below into a script called "gain-music-dir-recursive.sh" (or whatever you want to call it), and run it something like this:
$ gain-music-dir-recursive.sh ~/Music/ ~/Podcasts/
Then go and wait a while if you have a large music collection. (Or sit and watch the text scroll by for a while. It can be mesmerizing.) You can supply any number of directories on the command line, and it will process each of those directories and all of their subdirectories. If you don't supply any directory names, it will process the current directory.
Note that you will need to install the replaygain tool for each file type in your music library. To determine the correct program, look here: http://wiki.hydrogenaudio.org/index....le=Replay_Gain. However, you will then need to figure out which package contains the tool and install that package.
Anyway, here's the script:
Update: I also have a second script for doing the same thing. However, this script requires Gstreamer and Quod Libet, so if you don't want to install those, then stick with the script in this post. If you want the newer and arguably better script, go to https://github.com/DarwinAwardWinner/rganalysisCode:#!/bin/bash # gain-music-dir-recursive.sh: A script to apply replaygain to an # entire directory tree (or several). # Usage: gain-music-dir-recursive.sh [paths...] # Supply one or more paths in which to apply replaygain to all music files. # This determines what the script does when run with no arguments DEFAULT_MUSIC_DIR="." # You can set this to your music folder if [ -z "$(echo $@)" ]; then set $DEFAULT_MUSIC_DIR fi record_error () { errors="$errors\n$@" } print_errors () { if [ -n "$errors" ]; then echo -ne "The following errors were encountered: $errors\n" fi } gain_general_single () { if [ -z "$1$2" ]; then echo "Invalid input: $@" return fi local gain_target_file="$1" if [ "$(echo *.$gain_extension)" = "*.$gain_extension" ]; then #echo "No $gain_extension files in $(pwd)." return fi local gain_command="$2" local gain_track_opt="$3" local gain_opt="$gain_track_opt" echo "Running $gain_command $gain_opt \"$gain_target_file\" in $(pwd)" $gain_command $gain_opt "$gain_target_file" || record_error "In $(pwd):\n Failed to run: $gain_command $gain_opt \"$gain_target_file\".\n This file was not gained." } test_executable () { if which $(echo $1 | sed -e 's/ .*//') &>/dev/null; then return 0; #true else return 1; #false fi } gain_general () { if [ -z "$1$2" ]; then echo "Invalid input: $@" return fi local gain_extension=$1 if [ "$(echo *.$gain_extension)" = "*.$gain_extension" ]; then #echo "No $gain_extension files in $(pwd)." return fi local gain_command=$2 local gain_track_opt=$3 local gain_album_opt=$4 # Test for executability of the replaygain program test_executable $gain_command || { record_error "Unable to gain $gain_extension files because $(echo $gain_command | sed -e 's/ .*//') is not installed."; return; } local gain_opt="$gain_track_opt" if [ -f "ALBUMGAIN" ]; then local gain_opt="$gain_album_opt" fi echo "Running $gain_command $gain_opt *.$gain_extension in $(pwd)" $gain_command $gain_opt *.$gain_extension || { record_error "In $(pwd):\n Failed to run: $gain_command $gain_opt *.$gain_extension\n Falling back to one-track-at-a-time replaygain."; shift; local target; for target in *.$gain_extension; do gain_general_single "$target" "$@"; done }; } # These gain_mp3 () { gain_general mp3 "mp3gain -k -p" "-r" "-a"; } gain_ogg () { gain_general ogg "vorbisgain -a -s"; } gain_flac () { gain_general flac "metaflac --add-replay-gain --preserve-modtime"; } gain_wv () { gain_general wv "wvgain -a"; } gain_aac () { gain_general aac "aacgain -k -p" "-r" "-a"; gain_general mp4 "aacgain -k -p" "-r" "-a"; } gain_dir () { echo "Adding replaygain to known file types in $(pwd)" gain_mp3 gain_ogg gain_flac gain_wv gain_aac echo "Finished adding replaygain in $(pwd)" } gain_dir_recursive () { gain_dir if [ "$(echo */)" != "*/" ]; then local dir for dir in */; do pushd "$dir"; gain_dir_recursive popd; done fi } for dir in "$@"; do pushd "$dir" gain_dir_recursive popd; done print_errors
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Originally Posted by StrikerNL
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