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.. _audio_outputs:
AUDIO OUTPUT DRIVERS
====================
Audio output drivers are interfaces to different audio output facilities. The
syntax is:
--ao=<driver1[:suboption1[=value]:...],driver2,...[,]>
Specify a priority list of audio output drivers to be used.
If the list has a trailing ',' mpv will fall back on drivers not contained
in the list. Suboptions are optional and can mostly be omitted.
*NOTE*: See ``--ao=help`` for a list of compiled-in audio output drivers.
*EXAMPLE*:
- ``--ao=alsa,oss,`` Try the ALSA driver, then the OSS driver, then others.
- ``--ao=alsa:noblock:device=hw=0.3`` Sets noblock-mode and the device-name
as first card, fourth device.
Available audio output drivers are:
alsa
ALSA 0.9/1.x audio output driver
noblock
Sets noblock-mode.
device=<device>
Sets the device name. Replace any ',' with '.' and any ':' with '=' in
the ALSA device name. For hwac3 output via S/PDIF, use an "iec958" or
"spdif" device, unless you really know how to set it correctly.
oss
OSS audio output driver
<dsp-device>
Sets the audio output device (default: ``/dev/dsp``).
<mixer-device>
Sets the audio mixer device (default: ``/dev/mixer``).
<mixer-channel>
Sets the audio mixer channel (default: pcm).
jack
audio output through JACK (Jack Audio Connection Kit)
port=<name>
Connects to the ports with the given name (default: physical ports).
name=<client>
Client name that is passed to JACK (default: mpv [<PID>]). Useful
if you want to have certain connections established automatically.
(no-)estimate
Estimate the audio delay, supposed to make the video playback smoother
(default: enabled).
(no-)autostart
Automatically start jackd if necessary (default: disabled). Note that
this seems unreliable and will spam stdout with server messages.
coreaudio (Mac OS X only)
native Mac OS X audio output driver
device_id=<id>
ID of output device to use (0 = default device)
help
List all available output devices with their IDs.
openal
Experimental OpenAL audio output driver
pulse
PulseAudio audio output driver
[<host>][:<output sink>]
Specify the host and optionally output sink to use. An empty <host>
string uses a local connection, "localhost" uses network transfer
(most likely not what you want).
portaudio
PortAudio audio output driver. This works on all platforms, and has extensive
MS Windows support.
device
Specify the subdevice to use. Giving ``help`` as device name lists all
devices found by PortAudio. Devices can be given as numeric values,
starting from ``1``.
dsound (Windows only)
DirectX DirectSound audio output driver
device=<devicenum>
Sets the device number to use. Playing a file with ``-v`` will show a
list of available devices.
sdl
SDL 1.2+ audio output driver. Should work everywhere where SDL 1.2 builds,
but may require the SDL_AUDIODRIVER environment variable to be set
appropriately for your system.
buflen=<length>
Sets the audio buffer length in seconds. Is used only approximately,
or even disaregarded entirely by the sound system. Playing a file with
``-v`` will show the requested and obtained exact buffer size. A value
of 0 selects the sound system default.
bufcnt=<count>
Sets the number of extra audio buffers in mpv. Usually needs not be
changed.
null
Produces no audio output but maintains video playback speed. Use
``--no-audio`` for benchmarking.
pcm
raw PCM/wave file writer audio output
(no-)waveheader
Include or do not include the wave header (default: included). When
not included, raw PCM will be generated.
file=<filename>
Write the sound to <filename> instead of the default
``audiodump.wav``. If nowaveheader is specified, the default is
``audiodump.pcm``.
rsound
audio output to an RSound daemon
host=<name/path>
Set the address of the server (default: localhost). Can be either a
network hostname for TCP connections or a Unix domain socket path
starting with '/'.
port=<number>
Set the TCP port used for connecting to the server (default: 12345).
Not used if connecting to a Unix domain socket.
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