.. module:: pygame.mixer.music :synopsis: pygame module for controlling streamed audio
The music module is closely tied to :mod:`pygame.mixer`. Use the music module to control the playback of music in the sound mixer.
The difference between the music playback and regular Sound playback is that the music is streamed, and never actually loaded all at once. The mixer system only supports a single music stream at once.
On older pygame versions, MP3 support was limited under Mac and Linux. This
changed in pygame v2.0.2 which got improved MP3 support. Consider using
OGG file format for music as that can give slightly better compression than
MP3 in most cases.
.. function:: load | :sl:`Load a music file for playback` | :sg:`load(filename) -> None` | :sg:`load(fileobj, namehint="") -> None` This will load a music filename/file object and prepare it for playback. If a music stream is already playing it will be stopped. This does not start the music playing. If you are loading from a file object, the namehint parameter can be used to specify the type of music data in the object. For example: :code:`load(fileobj, "ogg")`. .. versionchangedold:: 2.0.2 Added optional ``namehint`` argument .. versionchanged:: 2.2.0 Raises ``FileNotFoundError`` instead of :exc:`pygame.error` if file cannot be found .. ## pygame.mixer.music.load ##
.. function:: unload | :sl:`Unload the currently loaded music to free up resources` | :sg:`unload() -> None` This closes resources like files for any music that may be loaded. .. versionaddedold:: 2.0.0 .. ## pygame.mixer.music.load ##
.. function:: play | :sl:`Start the playback of the music stream` | :sg:`play(loops=0, start=0.0, fade_ms=0) -> None` This will play the loaded music stream. If the music is already playing it will be restarted. ``loops`` is an optional integer argument, which is ``0`` by default, which indicates how many times to repeat the music. The music repeats indefinitely if this argument is set to ``-1``. ``start`` is an optional float argument, which is ``0.0`` by default, which denotes the position in time from which the music starts playing. The starting position depends on the format of the music played. ``MP3`` and ``OGG`` use the position as time in seconds. For ``MP3`` files the start time position selected may not be accurate as things like variable bit rate encoding and ID3 tags can throw off the timing calculations. For ``MOD`` music it is the pattern order number. Passing a start position will raise a NotImplementedError if the start position cannot be set. ``fade_ms`` is an optional integer argument, which is ``0`` by default, which denotes the period of time (in milliseconds) over which the music will fade up from volume level ``0.0`` to full volume (or the volume level previously set by :func:`set_volume`). The sample may end before the fade-in is complete. If the music is already streaming ``fade_ms`` is ignored. .. versionchangedold:: 2.0.0 Added optional ``fade_ms`` argument .. ## pygame.mixer.music.play ##
.. function:: rewind
| :sl:`restart music`
| :sg:`rewind() -> None`
Resets playback of the current music to the beginning. If :func:`pause` has
previously been used to pause the music, the music will remain paused.
.. note:: :func:`rewind` supports a limited number of file types and notably
``WAV`` files are NOT supported. For unsupported file types use :func:`play`
which will restart the music that's already playing (note that this
will start the music playing again even if previously paused).
.. ## pygame.mixer.music.rewind ##
.. function:: stop | :sl:`stop the music playback` | :sg:`stop() -> None` Stops the music playback if it is currently playing. endevent will be triggered, if set. It won't unload the music. .. ## pygame.mixer.music.stop ##
.. function:: pause | :sl:`temporarily stop music playback` | :sg:`pause() -> None` Temporarily stop playback of the music stream. It can be resumed with the :func:`unpause` function. .. ## pygame.mixer.music.pause ##
.. function:: unpause | :sl:`resume paused music` | :sg:`unpause() -> None` This will resume the playback of a music stream after it has been paused. .. ## pygame.mixer.music.unpause ##
.. function:: fadeout | :sl:`stop music playback after fading out` | :sg:`fadeout(time) -> None` Fade out and stop the currently playing music. The ``time`` argument denotes the integer milliseconds for which the fading effect is generated. Note, that this function blocks until the music has faded out. Calls to :func:`fadeout` and :func:`set_volume` will have no effect during this time. If an event was set using :func:`set_endevent` it will be called after the music has faded. .. ## pygame.mixer.music.fadeout ##
.. function:: set_volume | :sl:`set the music volume` | :sg:`set_volume(volume) -> None` Set the volume of the music playback. The ``volume`` argument is a float between ``0.0`` and ``1.0`` that sets the volume level. When new music is loaded the volume is reset to full volume. If ``volume`` is a negative value it will be ignored and the volume will remain set at the current level. If the ``volume`` argument is greater than ``1.0``, the volume will be set to ``1.0``. .. ## pygame.mixer.music.set_volume ##
.. function:: get_volume | :sl:`get the music volume` | :sg:`get_volume() -> value` Returns the current volume for the mixer. The value will be between ``0.0`` and ``1.0``. .. ## pygame.mixer.music.get_volume ##
.. function:: get_busy | :sl:`check if the music stream is playing` | :sg:`get_busy() -> bool` Returns True when the music stream is actively playing. When the music is idle this returns False. In pygame 2.0.1 and above this function returns False when the music is paused. In pygame 1 it returns True when the music is paused. .. versionchangedold:: 2.0.1 Returns False when music paused. .. ## pygame.mixer.music.get_busy ##
.. function:: set_pos | :sl:`set position to play from` | :sg:`set_pos(pos) -> None` This sets the position in the music file where playback will start. The meaning of "pos", a float (or a number that can be converted to a float), depends on the music format. For ``MOD`` files, pos is the integer pattern number in the module. For ``OGG`` it is the absolute position, in seconds, from the beginning of the sound. For ``MP3`` files, it is the relative position, in seconds, from the current position. For absolute positioning in an ``MP3`` file, first call :func:`rewind`. Other file formats are unsupported. Newer versions of SDL_mixer have better positioning support than earlier ones. A :exc:`pygame.error` is raised if a particular format does not support positioning. Function :func:`set_pos` calls underlying SDL_mixer function ``Mix_SetMusicPosition``. .. versionaddedold:: 1.9.2 .. ## pygame.mixer.music.set_pos ##
.. function:: get_pos | :sl:`get the music play time` | :sg:`get_pos() -> time` This gets the number of milliseconds that the music has been playing for. The returned time only represents how long the music has been playing; it does not take into account any starting position offsets. Returns -1 if ``get_pos`` failed due to music not playing. .. ## pygame.mixer.music.get_pos ##
.. function:: queue
| :sl:`queue a sound file to follow the current`
| :sg:`queue(filename) -> None`
| :sg:`queue(fileobj, namehint="", loops=0) -> None`
This will load a sound file and queue it. A queued sound file will begin as
soon as the current sound naturally ends. Only one sound can be queued at a
time. Queuing a new sound while another sound is queued will result in the
new sound becoming the queued sound. Also, if the current sound is ever
stopped or changed, the queued sound will be lost.
If you are loading from a file object, the namehint parameter can be used to specify
the type of music data in the object. For example: :code:`queue(fileobj, "ogg")`.
The following example will play music by Bach six times, then play music by
Mozart once:
::
pygame.mixer.music.load('bach.ogg')
pygame.mixer.music.play(5) # Plays six times, not five!
pygame.mixer.music.queue('mozart.ogg')
.. versionchangedold:: 2.0.2 Added optional ``namehint`` argument
.. versionchanged:: 2.2.0 Raises ``FileNotFoundError`` instead of :exc:`pygame.error` if file cannot be found
.. ## pygame.mixer.music.queue ##
.. function:: set_endevent | :sl:`have the music send an event when playback stops` | :sg:`set_endevent() -> None` | :sg:`set_endevent(type) -> None` This causes pygame to signal (by means of the event queue) when the music is done playing. The argument determines the type of event that will be queued. The event will be queued every time the music finishes, not just the first time. To stop the event from being queued, call this method with no argument. .. ## pygame.mixer.music.set_endevent ##
.. function:: get_endevent | :sl:`get the event a channel sends when playback stops` | :sg:`get_endevent() -> type` Returns the event type to be sent every time the music finishes playback. If there is no endevent the function returns ``pygame.NOEVENT``. .. ## pygame.mixer.music.get_endevent ##
.. function:: get_metadata
| :sl:`get metadata of the specified or currently loaded music stream`
| :sg:`get_metadata() -> dict`
| :sg:`get_metadata(filename) -> dict`
| :sg:`get_metadata(fileobj, namehint="") -> dict`
If no arguments are passed returns a dictionary containing metadata
of the currently loaded music stream, raises an exception if a music stream is not loaded.
Available keys are ``"title"``, ``"album"``, ``"artist"``, ``"copyright"``.
Values are strings containing corresponding retrieved metadata.
If particular metadata was not found the value is an empty string.
Here is an example:
``{'title': 'Small Tone', 'album': 'Tones', 'artist': 'Audacity Generator', 'copyright': ''}``
Refer to the :func:`pygame.mixer.music.load` function for arguments regarding specifying a file or a file-like object
whose metadata you want to retrieve. For this function all arguments are optional,
however, specifying only the ``namehint`` will raise an exception.
Since the underlying functionality was introduced in version 2.6.0 of SDL_mixer,
calling this function with an older version of SDL_mixer will return a dictionary
with all values being set to empty strings. You can find your version of SDL_mixer
by using :func:`pygame.mixer.get_sdl_mixer_version`.
.. versionadded:: 2.1.4
.. ## pygame.mixer.music.get_metadata ##