Interacting with Quod Libet

In Python

Quod Libet supports plugins written in Python. These plugins can interact with songs more directly than the other interfaces, changing or reading metadata using dict-like !AudioFile objects. The plugin interface has not yet stabilized, although we do not expect it to change drastically in the future.

The Unix Way

Querying the player

Quod Libet writes information about the current song to ~/.quodlibet/current. The file is in key=value form. Key values are in UTF-8, except for the ~filename key, which has unknown encoding (but will point to the file being played when interpreted as a sequence of bytes).

There is a --print-playing option which can use the same syntax as the RenamingFiles interface to print information about the current song: quodlibet --print-playing '<artist> - <tracknumber~title>'

quodlibet --status provides player state information. The first word will be either playing, paused, or not-running, followed by

  • the selected View,
  • volume setting (0.0 - 1.0)
  • Playback order & repeat settings

If the View is SearchBar, then the text currently in the search bar will be displayed on a second status line.

Controlling the player

Quod Libet understands a number of command line arguments to control a running player. For a full list, see the man page.

  • --next, --previous, --play, and --pause should be self-explanatory; --play-pause toggles pause on and off.
  • --volume n sets the volume to anywhere between 0 (muted) or 100 (full volume)
  • --seek <time> seeks within the current song.
  • --query <search text> searches in your library (if the current browser supports it).
  • --play-file <filename> plays that file or directory.

Quod Libet can also be controlled via a FIFO , ~/.quodlibet/control. To see how the command-line arguments map to FIFO commands, refer to process_arguments() in https://github.com/quodlibet/quodlibet/blob/master/quodlibet/quodlibet/cli.py; as a simple example:

# Sets volume to 50%
echo volume 50 > ~/.quodlibet/control

Integration with third party tools

Quod Libet in Conky

Conky is a lightweight system monitor for X. It includes builtin objects for many popular music players, but not quodlibet (yet). That doesn’t mean you can’t use conky with quodlibet. After installing conky, add the following to your```~/.conkyrc`` file:

${if_existing /<path to your home directory>/.quodlibet/current}
${exec quodlibet --print-playing "<artist>"}
${scroll 50 ${exec quodlibet --print-playing "<title~album>"}  }
${endif}

will display the current artist on one line with a scrolling display of song title and album on the next line. Conky will only attempt to display this information if quodlibet is playing.

eSpeak: Speech Synthesizer

You can use eSpeak to hear the current playing title.

quodlibet --print-playing "<~~people~title>" | espeak -s 120  -v $(quodlibet --print-playing "<language|<language>|en>")

In this example Quod Libet will use the value of the language tag to tell eSpeak which language/voice to use for the specific title (Use espeak --voices` to get a list of all available languages).

You can also lower the volume during speaking:

VOL=$(echo $(quodlibet --status | head -n1 | cut -d\  -f3)*100 | bc)
quodlibet --volume=$(echo $VOL/3 | bc)
quodlibet --print-playing "<~~people~title>" | espeak -s 120 -v $(quodlibet --print-playing "<language|<language>|en>")
quodlibet --volume=$(echo $VOL/1 | bc)