Quod Libet (software)

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Quod Libet
Quodlibet logo.svg
Quodlibet0231screenshot.png
Screenshot of Quod Libet's paned main browser window.
Developer(s) Quod Libet Team[1]
Initial release 30 October 2004; 10 years ago (2004-10-30)[2]
Stable release 3.4.0[3] (9 April 2015; 3 months ago (2015-04-09)) [±]
Development status Active
Written in Python (PyGObject)
Operating system Linux, Unix-like, OS X, Windows,
Size

MB (Plugins 90 KB)

16.9 MB – Windows Installer[4]
Available in Multilanguage[which?]
Type Audio player
License GNU General Public License[5]
Website quodlibet.readthedocs.org/en/latest/

Quod Libet is a cross-platform free and open-source music player, tag editor and library organizer. The main design philosophy is that the user knows how they want to organize their music best and is built to be fully customizable and extensible using regular expressions. Quod Libet is a GTK+-based audio player that is written in Python, and uses the Mutagen tagging library. Ex Falso is the stand-alone tag-editing app (no audio) based on the same code and libraries.

Quod Libet is also very scalable, able to handle libraries with tens of thousands of songs with ease. It provides a full feature set including support for Unicode, regular expression searching, key bindings to multimedia keys, fast but powerful tag editing, and an variety of plugins.

Quod Libet is available on a full range of GNU/Linux distributions and has been used on FreeBSD, Mac OS X, and Windows as well, requiring only PyGObject, Python, and an OSS or ALSA compatible audio device. The Xfce netinstall disk image provided by the Debian project installs Quod Libet as the default music program.

Features[edit]

The tag editor interface, used by both Quod Libet and Ex Falso, that allows any tag to be changed as well as any file to be renamed or moved.

Audio Playback[edit]

  • Can deal with various audio back-ends via the plug-in architecture of GStreamer
  • Supports Replay Gain with smart selection based on either single track or full album, based on current view and play order
  • 'Real' shuffle mode- entire playlist played before repeating
  • Ratings weighted random playback setting
  • Play queue

Tag editing[edit]

  • Complete Unicode support
  • Changes to multiple files at once, even if files are in different formats
  • Ability to tag files based on filenames with fully configurable formats
  • Customizable renaming of files based on their tags and a user-supplied format
  • Human readable tag references, e.g. <artist> or <title> rather than %a or %t, with support for "if not-null x else y" logic (e.g. <albumartist|albumartist|artist>)
  • Fast track renumbering

Audio Library[edit]

  • Can save play counts and song ratings
  • Can download and save lyrics
  • Fast refreshing of entire library based on changed files
  • Internet Radio / SHOUTcast support
  • Audio Feeds / Podcast support

User Interface[edit]

Screenshot demonstrating Quodlibet's capabilities to organize and display audio files with custom tags.
  • Configurable interface to suit user preferences; Pango markup is used so that user can display tags in any way desired in the player
  • Drag-n-drop support throughout interface.
  • Tray icon with full player control
  • Automatically recognize and display tags from many uncommon tags
  • Multiple ways to browse library:
    • Progressive search - library is filtered as searches are typed
    • Queries support boolean logic, numerical / date-based expressions, and regular expressions, and synthetic tags, that are derived internally (e.g. play count, rating, inclusion in playlist).
    • Playlists with integration throughout the player
    • Paned browser, using any fully customizable tags (e.g. genre, date, album artist...), allowing the user to [drill down] through their library as they prefer
    • View by album list with cover art
    • View by file-system directory, which includes songs not in your library

File Formats[edit]

Include MP3, Ogg Vorbis, Opus, FLAC, Musepack, MOD/XM/IT, WMA, Wavpack, MPEG-4 AAC

Unix-like control and query mechanisms[edit]

  • Status information available from the command line[6]
  • Control of player using named pipe (FIFO) is possible[7]
  • Text-based files available with current song information.

Plugins[edit]

Quod Libet is currently bundled with over 60 Python-based plugins, including:

  • Automatic tagging via MusicBrainz and CDDB
  • Download and preview album art from a variety of online sources
  • On-screen display pop-ups
  • Last.fm/AudioScrobbler submission
  • Tag character encoding conversion
  • Intelligent title-casing of tags
  • Finding duplicate or near-duplicate songs across the entire library.
  • Scan and save Replay Gain values across multiple albums at once (using GStreamer)
  • D-Bus-based Multimedia Shortcut Keys
  • Integrate with Logitech Squeezebox.
  • Export playlists to common formats

See also[edit]

References[edit]

External links[edit]