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MPD: Music Player Daemon

Sep 2, 2008 how-to, linux

About:

Music Player Daemon (MPD) allows remote access for playing music (MP3, Ogg Vorbis, FLAC, AAC, Mod, and wave files) and managing playlists. MPD is designed for integrating a computer into a stereo system that provides control for music playback over a local network. It also makes a great desktop music player, especially if you are a console junkie, like frontend options, or restart X often.

@ MPD homepage

Overview:

Não estou aqui para explicar o que é  - Todos percebem que é um leitor de música.
Mas sim apresentá-lo e indicar as instruções de como o instalar.

Instalação/Configuração:

# apt-get install mpd sonata
Agora vem a parte chata e um bocado confusa. É preciso configurar o mpd antes de o poder utilizar. Para começar vamos editar o ficheiro /etc/mpd.conf. Recomendo que façam uma cópia de segurança do ficheiro inicial para prevenir futuros deslizes e evitar que se ande a procurar o mpd.conf pela web.
# cp /etc/mpd.conf /etc/mpd.conf.backup
# nano /etc/mpd.conf

1. REQUIRED PATHS & OPTIONAL PATHS
   Neste passo é necessário configurar as directorias segundo o local onde está localizada a nossa música. No campo music_directory coloquem a directoria da vossa música (apenas dá para colocar uma) e nas restantes copiem deste exemplo.
   ######################## REQUIRED PATHS ########################
# You can put symlinks in here, if you like. Make sure that
# the user that mpd runs as (see the 'user' config parameter)
# can read the files in this directory.
music_directory      “/home/os.meus.documentos/music”
playlist_directory   “~/.mpd/playlists”
db_file              “~/.mpd/tag_cache”
log_file             “~/.mpd/mpd.log”
error_file           “~/.mpd/errors.log”
pid_file             “~/.mpd/pid”
################################################################
#
######################## OPTIONAL PATHS ########################
#
# If specified, MPD will save its current state (playlist,
# current song, playing/paused, etc.) at exit. This will be
# used to restore the session the next time it is run.
#
state_file “~/.mpd/state”
#
################################################################
2. DAEMON OPTIONS
   Coloquem no campo user o nome do vosso user (no meu caso é qaz). Descomentem os restantes.
   ######################## DAEMON OPTIONS ########################
#
# If started as root, MPD will drop root privileges and run as
# this user instead.  Otherwise, MPD will run as the user it was
# started by.  If left unspecified, MPD will not drop root
# privileges at all (not recommended).
#
user                            “qaz”
#
# The address and port to listen on.
#
bind_to_address                 “localhost”
port                            “6600″
#
# Controls the amount of information that is logged.  Can be
# “default”, “secure”, or “verbose”.
#
log_level                       “default”
#
################################################################
3. AUDIO OUTPUTS & MIXER
   Descomentem as linhas do vosso output. No meu caso é alsa.
   ########################## AUDIO OUTPUT ########################
#
# MPD supports many audio output types, as well as playing
# through multiple audio outputs at the same time.  You can
# specify one or more here.  If you don't specify any, MPD will
# automatically scan for a usable audio output.
#
# See <http://mpd.wikia.com/wiki/Configuration#Audio_Outputs>
# for examples of other audio outputs.
#
# An example of an ALSA output:
#
audio_output {
type                    “alsa”
name                    “My ALSA Device”
#        device                  “hw:0,0″     # optional
#        format                  “44100:16:2″ # optional
}
#
# An example of an OSS output:
#
#audio_output {
#        type                    “oss”
#        name                    “My OSS Device”
#        device                  “/dev/dsp”   # optional
#        format                  “44100:16:2″ # optional
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
#        type                    “shout”
#        name                    “My Shout Stream”
#        host                    “localhost”
#        port                    “8000″
#        mount                   “/mpd.ogg”
#        password                “hackme”
#        quality                 “5.0″
#        bitrate                 “128″
#        format                  “44100:16:1″
#        user                    “source”                # optional
#        description             “My Stream Description” # optional
#        genre                   “jazz”                  # optional
#        public                  “no”                    # optional
#}
#
# Force all decoded audio to be converted to this format before
# being passed to the audio outputs.
#
#audio_output_format             “44100:16:2″
#
################################################################
#
############################# MIXER ############################
#
# MPD needs to know what mixer settings to change when you
# adjust the volume.  If you don’t specify one here, MPD will
# pick one based on which ones it was compiled with support for.
#
# An example for controlling an ALSA mixer:
#
mixer_type                      “alsa”
mixer_device                    “default”
mixer_control                   “PCM”
#
# An example for controlling an OSS mixer:
#
#mixer_type                      “oss”
#mixer_device                    “/dev/mixer”
#mixer_control                   “PCM”
#
# If you want MPD to adjust the volume of audio sent to the
# audio outputs, you can tell it to use the software mixer:
#
#mixer_type                      “software”
#
################################################################

4. OTHER OPTIONS
   Descomentem as duas entradas.
   ######################### OTHER OPTIONS ########################
#
# The metadata types MPD will recognize.
#
metadata_to_use                  “artist,album,title,track,name,genre,date,composer,performer,disc”
#
# Enable this if you wish to use your MPD created playlists in
# other music players.
#
save_absolute_paths_in_playlists “no”
#
################################################################
5. Outras configurações
   Ficaram como estão por default. Para evitar dúvidas aqui fica o MEU resultado final.

Agora temos de adicionar o nosso user (qaz no meu caso) ao grupo mpd (a necessidade deste passo desconheço):
# groupadd mpd
# gpasswd -a qaz mpd
Certifica-te que a pasta ~/.mpd não necessita de previlégios root.

Agora iremos fazer a base de dados - poderá demorar algum tempo.
$ mpd --create-db
Neste momento já tens o mpd completamente instalado e configurado.
$ mpd

Frontend:

Necessitamos apenas agora de um frontend. Vou escolher o Sonata.

Sonata is an elegant GTK+ music client for the Music Player Daemon (MPD).

@ Sonata Homepage

O Sonata também requer alguma configuração. Mas primeiro lança-lo:
$ sonata
Vão até as preferências e no separador MPD insiram as vossas configurações. MEU caso ficará:

• Name: qaz
• Host: localhost
• Port: 6600
• Password: (em branco)
• Music dir: /home/os.meus.documentos/music/

Se necessário matem os dois processos (killall) e lancem de novo mpd e sonata.

Referências:
» Techzone/Zwame
» ArchLinux Wiki
» MPD homepage

Meus ficheiros:
» http://dotfiles.org/~uterrorista/%2Fetc%2Fmpd.conf

FeedBack:
Se tiverem alguma dúvida ou reparo no tutorial não hesitem - os comentários são para isso mesmo

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Tags: frontend, mpd, music player