Raspberry Pi

[bobrathbone]

Bug report

Describe the bug

Unable to load a playlist which points to .mp3 music files contained in /home/pi/Music on the SD card Operating System is Raspberry Pi OS Bookworm.

Expected Behavior

MPD should load the playlist.

Actual Behavior

Playlist is zero length MPD loads the similar music stored on USB stick. I also tried exactly the same music files on both the SD card and USB stick.

pi@bookworm32:~ $ mpc clear volume: 45% repeat: off random: off single: off consume: off pi@bookworm32:~ $ mpc load SD_Card loading: SD_Card pi@bookworm32:~ $ mpc play 1 MPD error: Bad song index pi@bookworm32:~ $ mpc load USB_Stick loading: USB_Stick pi@bookworm32:~ $ mpc play 1 Albert West - Ginny come lately [playing] #1/82 0:00/2:56 (0%) volume: 45% repeat: off random: off single: off consume: off

The following playlist says it has been loaded however the list is zero length.

pi@bookworm32:~ $ head -5 /var/lib/mpd/playlists/SD_Card.m3u sdcard/Stealers Wheel/Album onbekend/Stealers Wheel - Stuck In The Middle With You.mp3 sdcard/Dizzy Man's Band/Album onbekend/Dizzy Man's Band - Matter of facts.mp3 sdcard/Dizzy Man's Band/Album onbekend/Dizzy Man's Band - The Show.mp3 sdcard/Dizzy Man's Band/De 100 Beste Hits Onder De Zon (CD4 5)/Dizzy Man's Band - Let's Go To The Beach.mp3 sdcard/Jim Gilstrap/Top2000 Subtop Editie 2009 Disc 3/18 Swing Your Daddy.wma

The following loads OK pi@bookworm32:~ $ head -5 /var/lib/mpd/playlists/USB_Stick.m3u media/Albert West/Album onbekend/Ginny come lately Albert West .mp3 media/Astrid Nijgh/Album onbekend/Ik Doe Wat Ik Doe Astrid Nijgh .mp3 media/Barry Blue/One Hit Wonders CD 3 - 1972-7/Sampler - Barry Blue Dancing On A Saturday Night.mp3 media/Bee Gees/Album onbekend/Bee Gees - My World.mp3 media/Billy Joel/The Ultimate Collection [Disc 01]/Piano Man.mp3

Note sdcard and media are soft links to /home/pi/Music and /media/pi (USB Stick)

pi@bookworm32:~ $ ls -la /var/lib/mpd/music/ total 8 drwxr-xr-x 2 root root 4096 Jan 10 11:53 . drwxr-xr-x 5 mpd audio 4096 Jan 10 12:20 .. lrwxrwxrwx 1 root root 9 Jan 10 11:53 media -> /media/pi lrwxrwxrwx 1 root root 14 Jan 10 11:53 sdcard -> /home/pi/Music :

Version

mpd --version Music Player Daemon 0.23.14 (0.23.14) Copyright 2003-2007 Warren Dukes warren.dukes@gmail.com Copyright 2008-2021 Max Kellermann max.kellermann@gmail.com This is free software; see the source for copying conditions. There is NO warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Database plugins: simple proxy upnp

Storage plugins: local udisks nfs curl

Neighbor plugins: upnp udisks

Decoders plugins: [mad] mp3 mp2 [mpg123] mp3 [vorbis] ogg oga [oggflac] ogg oga [flac] flac [opus] opus ogg oga [sndfile] wav aiff aif au snd paf iff svx sf voc w64 pvf xi htk caf sd2 [audiofile] wav au aiff aif [dsdiff] dff [dsf] dsf [hybrid_dsd] m4a [faad] aac [mpcdec] mpc [wavpack] wv [modplug] 669 amf ams dbm dfm dsm far it med mdl mod mtm mt2 okt s3m stm ult umx xm [mikmod] amf dsm far gdm imf it med mod mtm s3m stm stx ult uni xm [sidplay] sid mus str prg P00 [wildmidi] mid [fluidsynth] mid [adplug] amd d00 hsc laa rad raw sa2 [gme] ay gbs gym hes kss nsf nsfe rsn sap spc vgm vgz [ffmpeg] 16sv 3g2 3gp 4xm 8svx aa3 aac ac3 adx afc aif aifc aiff al alaw amr anim apc ape asf atrac au aud avi avm2 avs bap bfi c93 cak cin cmv cpk daud dct divx dts dv dvd dxa eac3 film flac flc fli fll flx flv g726 gsm gxf iss m1v m2v m2t m2ts m4a m4b m4v mad mj2 mjpeg mjpg mka mkv mlp mm mmf mov mp+ mp1 mp2 mp3 mp4 mpc mpeg mpg mpga mpp mpu mve mvi mxf nc nsv nut nuv oga ogm ogv ogx oma ogg omg opus psp pva qcp qt r3d ra ram rl2 rm rmvb roq rpl rvc shn smk snd sol son spx str swf tak tgi tgq tgv thp ts tsp tta xa xvid uv uv2 vb vid vob voc vp6 vmd wav webm wma wmv wsaud wsvga wv wve rtp:// rtsp:// rtsps:// [pcm]

Filters: libsamplerate soxr

Tag plugins: id3tag

Output plugins: shout null fifo sndio pipe alsa ao openal pulse jack httpd snapcast recorder

Encoder plugins: null vorbis opus lame twolame wave flac shine

Archive plugins: [bz2] bz2 [zzip] zip [iso] iso

Input plugins: file archive alsa qobuz curl ffmpeg nfs mms cdio_paranoia

Playlist plugins: extm3u m3u pls xspf asx rss soundcloud flac cue embcue

Protocols: file:// alsa:// cdda:// ftp:// ftps:// gopher:// hls+http:// hls+https:// http:// https:// mms:// mmsh:// mmst:// mmsu:// nfs:// qobuz:// rtmp:// rtmpe:// rtmps:// rtmpt:// rtmpte:// rtmpts:// rtp:// rtsp:// rtsps:// scp:// sftp:// smb:// srtp://

Other features: avahi dbus udisks epoll icu inotify ipv6 systemd tcp un

Configuration

pi@bookworm32:~ $ cat /etc/mpd.conf
# An example configuration file for MPD.
# Read the user manual for documentation: http://www.musicpd.org/doc/user/
# or /usr/share/doc/mpd/html/user.html

# Files and directories #######################################################
#
# This setting controls the top directory which MPD will search to discover the
# available audio files and add them to the daemon's online database. This
# setting defaults to the XDG directory, otherwise the music directory will be
# be disabled and audio files will only be accepted over ipc socket (using
# file:// protocol) or streaming files over an accepted protocol.
#
music_directory         "/var/lib/mpd/music"
#
# This setting sets the MPD internal playlist directory. The purpose of this
# directory is storage for playlists created by MPD. The server will use
# playlist files not created by the server but only if they are in the MPD
# format. This setting defaults to playlist saving being disabled.
#
playlist_directory              "/var/lib/mpd/playlists"
#
# This setting sets the location of the MPD database. This file is used to
# load the database at server start up and store the database while the
# server is not up. This setting defaults to disabled which will allow
# MPD to accept files over ipc socket (using file:// protocol) or streaming
# files over an accepted protocol.
#
db_file                 "/var/lib/mpd/tag_cache"

# These settings are the locations for the daemon log files for the daemon.
#
# The special value "syslog" makes MPD use the local syslog daemon. This
# setting defaults to logging to syslog.
#
# If you use systemd, do not configure a log_file.  With systemd, MPD
# defaults to the systemd journal, which is fine.
#
log_file                        "/var/log/mpd/mpd.log"

# This setting sets the location of the file which stores the process ID
# for use of mpd --kill and some init scripts. This setting is disabled by
# default and the pid file will not be stored.
#
# If you use systemd, do not configure a pid_file.
#
#pid_file                       "/run/mpd/pid"

# This setting sets the location of the file which contains information about
# most variables to get MPD back into the same general shape it was in before
# it was brought down. This setting is disabled by default and the server
# state will be reset on server start up.
#
state_file                      "/var/lib/mpd/state"
#
# The location of the sticker database.  This is a database which
# manages dynamic information attached to songs.
#
sticker_file                   "/var/lib/mpd/sticker.sql"
#
###############################################################################

# General music daemon options ################################################
#
# This setting specifies the user that MPD will run as. MPD should never run as
# root and you may use this setting to make MPD change its user ID after
# initialization. This setting is disabled by default and MPD is run as the
# current user.
#
user                            "mpd"
#
# This setting specifies the group that MPD will run as. If not specified
# primary group of user specified with "user" setting will be used (if set).
# This is useful if MPD needs to be a member of group such as "audio" to
# have permission to use sound card.
#
#group                          "nogroup"
#
# This setting sets the address for the daemon to listen on. Careful attention
# should be paid if this is assigned to anything other than the default, any.
# This setting can deny access to control of the daemon. Not effective if
# systemd socket activation is in use.
#
# For network
bind_to_address         "127.0.0.1"
#
# And for Unix Socket
#bind_to_address                "/run/mpd/socket"
#
# This setting is the TCP port that is desired for the daemon to get assigned
# to.
#
#port                           "6600"
#
# Suppress all messages below the given threshold.  Use "verbose" for
# troubleshooting. Available setting arguments are "notice", "info", "verbose",
# "warning" and "error".
#
#log_level                      "notice"
#
# Setting "restore_paused" to "yes" puts MPD into pause mode instead
# of starting playback after startup.
#
#restore_paused "no"
#
# This setting enables MPD to create playlists in a format usable by other
# music players.
#
#save_absolute_paths_in_playlists       "no"
#
# This setting defines a list of tag    type            "alsa"
# audio file discovery process. The complete list of possible values can be
# found in the user manual.
#metadata_to_use        "artist,album,title,track,name,genre,date,composer,performer,disc"
#
# This example just enables the "comment" tag without disabling all
# the other supported tags:
#metadata_to_use "+comment"
#
# This setting enables automatic update of MPD's database when files in
# music_directory are changed.
#
#auto_update    "yes"
#
# Limit the depth of the directories being watched, 0 means only watch
# the music directory itself.  There is no limit by default.
#
#auto_update_depth "3"
#
###############################################################################

# Symbolic link behavior ######################################################
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links outside of the configured music_directory.
#
follow_outside_symlinks        "yes"
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links inside of the configured music_directory.
#
follow_inside_symlinks         "yes"
#
###############################################################################

# Zeroconf / Avahi Service Discovery ##########################################
#
# If this setting is set to "yes", service information will be published with
# Zeroconf / Avahi.
#
#zeroconf_enabled               "yes"
#
# The argument to this setting will be the Zeroconf / Avahi unique      name            "Waveshare WM8960 DAC"
# this MPD server on the network. %h will be replaced with the hostname.
#
#zeroconf_name                  "Music Player @ %h"
#
###############################################################################

# Permissions #################################################################
#
# If this setting is set, MPD will require password authorization. The password
# setting can be specified multiple times for different password profiles.
#
#password                        "password@read,add,control,admin"
#
# This setting specifies the permissions a user has who has not yet logged in.
#
#default_permissions             "read,add,control,admin"
#
###############################################################################

# Database #######################################################################
#
# An example of a database section instead of the old 'db_file' setting.
# It enables mounting other storages into the music directory.
#
#database {
#       plugin "simple"
#       path "/var/lib/mpd/tag_cache"
#       cache_directory "/var/lib/mpd/cache"
#}
#
# An example of database config for a satellite setup
#
#music_directory "nfs://fileserver.local/srv/mp3"
#database {
#       plugin "proxy"
#       host "other.mpd.host"
#       port "6600"
#}

# Input #######################################################################
#
input {
        plugin "curl"
#       proxy "proxy.isp.com:8080"
#       proxy_user "user"
#       proxy_password "password"
}

# Decoder #####################################################################
#

decoder {
        plugin                  "hybrid_dsd"
        enabled                 "no"
#       gapless                 "no"
}
decoder {
        plugin        "wildmidi"
        enabled       "no"
        #config_file "/etc/timidity/timidity.cfg"
}

#
###############################################################################

# Audio Output ################################################################
#
# MPD supports various audio output     type            "alsa"
# audio outputs at the same time, through multiple audio_output settings
# blocks. Setting this block is optional, though the server will only attempt
# autodetection for one sound card.
#
# An example of an ALSA output:

audio_output {
        type            "alsa"
        name            "Waveshare WM8960 DAC"
        mixer_type      "software"
#       device          "hw:0,0"
#       mixer_control   "PCM"           # optional
#       mixer_index     "0"             # optional
}

# An example of an OSS output:
#
#audio_output {
#       type            "oss"
#       name            "My OSS Device"
##      device          "/dev/dsp"      # optional
##      mixer_type      "hardware"      # optional
##      mixer_device    "/dev/mixer"    # optional
##      mixer_control   "PCM"           # optional
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
#       type            "shout"
#       encoder         "vorbis"                # optional
#       name            "My Shout Stream"
#       host            "localhost"
#       port            "8000"
#       mount           "/mpd.ogg"
#       password        "hackme"
#       quality         "5.0"
#       bitrate         "128"
#       format          "44100:16:1"
##      protocol        "icecast2"              # optional
##      user            "source"                # optional
##      description     "My Stream Description" # optional
##      url             "http://example.com"    # optional
##      genre           "jazz"                  # optional
##      public          "no"                    # optional
##      timeout         "2"                     # optional
##      mixer_type      "software"              # optional
#}
#
# An example of a recorder output:
#
#audio_output {
#       type            "recorder"
#       name            "My recorder"
#       encoder         "vorbis"                # optional, vorbis or lame
#       path            "/var/lib/mpd/recorder/mpd.ogg"
##      quality         "5.0"                   # do not define if bitrate is defined
#       bitrate         "128"                   # do not define if quality is defined
#       format          "44100:16:1"
#}
#
# An example of a httpd output (built-in HTTP streaming server):
#
#audio_output {
#       type            "httpd"
#       name            "My HTTP Stream"
#       encoder         "vorbis"                # optional, vorbis or lame
#       port            "8000"
#       bind_to_address "0.0.0.0"               # optional, IPv4 or IPv6
##      quality         "5.0"                   # do not define if bitrate is defined
#       bitrate         "128"                   # do not define if quality is defined
#       format          "44100:16:1"
#       max_clients     "0"                     # optional 0=no limit
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
# Please see README.Debian if you want mpd to play through the pulseaudio
# daemon started as part of your graphical desktop session!
#
#audio_output {
#       type            "pulse"
#       name            "My Pulse Output"
##      server          "remote_server"         # optional
##      sink            "remote_server_sink"    # optional
##      media_role      "media_role"            #optional
#}
#
# An example of a winmm output (Windows multimedia API).
#
#audio_output {
#       type            "winmm"
#       name            "My WinMM output"
##      device          "Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
#               or
##      device          "0"             # optional
##      mixer_type      "hardware"      # optional
#}
#
# An example of an openal output.
#
#audio_output {
#       type            "openal"
#       name            "My OpenAL output"
##      device          "Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
#}
#
# An example of an sndio output.
#
#audio_output {
#       type            "sndio"
#       name            "sndio output"
#       mixer_type      "hardware"
#}
#
# An example of an OS X output:
#
#audio_output {
#       type            "osx"
#       name            "My OS X Device"
##      device          "Built-in Output"       # optional
##      channel_map      "-1,-1,0,1"    # optional
#}
#
## Example "pipe" output:
#
#audio_output {
#       type            "pipe"
#       name            "my pipe"
#       command         "aplay -f cd 2>/dev/null"
## Or if you're want to use AudioCompress
#       command         "AudioCompress -m | aplay -f cd 2>/dev/null"
## Or to send raw PCM stream through PCM:
#       command         "nc example.org 8765"
#       format          "44100:16:2"
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
#       type            "null"
#       name            "My Null Output"
#       mixer_type      "none"                  # optional
#}
#
###############################################################################

# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument "off", "album", "track" or "auto". "auto" is a special mode that
# chooses between "track" and "album" depending on the current state of
# random playback. If random playback is enabled then "track" mode is used.
# See <https://wiki.hydrogenaud.io/index.php?title=Replaygain> for
# more details about ReplayGain.
# This setting is off by default.
#
#replaygain                     "album"
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp              "0"
#
# This setting sets the pre-amp used for files that do NOT have ReplayGain tags.
# By default this setting is disabled.
#
#replaygain_missing_preamp      "0"
#
# This setting enables or disables ReplayGain limiting.
# MPD calculates actual amplification based on the ReplayGain tags
# and replaygain_preamp / replaygain_missing_preamp setting.
# If replaygain_limit is enabled MPD will never amplify audio signal
# above its original level. If replaygain_limit is disabled such amplification
# might occur. By default this setting is enabled.
#
#replaygain_limit               "yes"
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has
# equal "loudness". This setting is disabled by default.
#
#volume_normalization           "no"
#
###############################################################################

# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you
# may need to modify this setting.
#
filesystem_charset              "UTF-8"
#
###############################################################################

Log

Jan 10 12:29 : exception: Bad song index

[MaxKellermann]

Do these songs exist in your database? Show the verbose MPD log of mpc update sdcard.

[bobrathbone]

I have been meaning to update this post as this problem has turned out to be a simple permissions problem. MPD is unable to access the contents of /home/pi/Music as it doesn't have permission. This directory is populated with several hundred music tracks. I have a workaround which was to create a directory /usr/share/Music and use this instead. This works perfectly as MPD can access this directory.

However as requested a verbose MPD log of clear, load and play as requested. The playlist is called SD_Card mpc clear

Apr 04 11:11 : client: [0] opened from 127.0.0.1:59930
Apr 04 11:11 : client: [0] process command "clear"

mpc load SD_Card

Apr 04 11:11 : client: [1] opened from 127.0.0.1:58254
Apr 04 11:11 : client: [1] process command list
Apr 04 11:11 : client: process command "load "SD_Card""
Apr 04 11:11 : client: command returned 0
Apr 04 11:11 : client: [1] process command list returned 0
Apr 04 11:11 : client: [1] closed

mpc play 2

Apr 04 11:12 : client: [3] opened from 127.0.0.1:45932
Apr 04 11:12 : client: [3] process command "play "2""
Apr 04 11:12 : exception: Bad song index
Apr 04 11:12 : client: [3] command returned 3
Apr 04 11:12 : client: [3] closed

The playlist has not been loaded due to no access by MPD to /home/pi/Music mpc listall

Apr 04 11:22 : client: [5] opened from 127.0.0.1:37096
Apr 04 11:22 : client: [5] process command "listall """
Apr 04 11:22 : client: [5] command returned 0
Apr 04 11:22 : client: [5] closed

This problem of MPD accessing /home/pi/Music has only happened since the release of Bookworm.

BTW I have been using MPD for 10-years for my own Internet Radio project See: https://www.bobrathbone.com/raspberrypi/pi_internet_radio.html

Bob Rathbone

[bobrathbone]

Sorry closed the issue by mistake. Re-opened.

[MaxKellermann]

Why did you reopen? The problem was file permissions which is not something that can be fixed by MPD; it was only your mistake.

[bobrathbone]

That is not correct! I did not create /home/pi/Music. This is a standard directory installed when you install the Raspberry Pi OS with user pi. The Music sub-directory permissions are set to 777 and pi;pi respectively so there is no problem there. With respect I remind you that this does not happen in the case of Bullseye which is running an earlier version of MPD. The reason is shown below.

Permissions and ownership of /home/pi on Bullseye

drwxr-xr-x   3 root root  4096 Dec  5 03:08 home
drwxr-xr-x 15 pi   pi   4096 Apr  1 12:24 pi

Permissions and ownership of /home/pi on Bookworm

drwxr-xr-x   3 root root  4096 Dec  5 01:34 home 
drwx------ 17 pi   pi   4096 Apr  3 15:13 pi

You can see that there is a difference between the two. Debian have removed read/execute permissions for other and group from the pi user directory presumably for security reasons. This is the problem and not anything I have done.

I think that you can close this one as you rightly point out that there is nothing you can do about this without changing permissions on the pi user directory to restore access to ‘other’ and ‘group’ sudo chmod og+rx /home/pi

But I am certainly not going to do that as I guess that the authors of Debian probably had a good reason for changing the user directory permissions.

[MaxKellermann]

Oh yes I was correct. The problem was your mistake, because you expected MPD to load files from a directory it didn't have permissions to access. It does not matter if these were Debian's default permissions; if you want MPD to read certain files, it is only your responsibility to grant that access, not Debian's.

[bobrathbone]

With respect what this shows is that MPD never tested this aspect of their product on Bookworm. /home/pi/Music is the standard music directory and has been for years. I am quite happy for you to close this but if you continue to keep saying this is my mistake I will ask for a moderator to examine this post as I find your responses quite offensive.

[MaxKellermann]

It's not this project's responsibility to test "our product" with insufficient file permissions, because granting file permissions is only your responsibility.

If you believe that pointing out your responsibilities offensive, then this is not the right forum for you. Bye.