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https://github.com/mpv-player/mpv
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This mainly serves as a fallback for platforms where nothing better is available; also as a debugging help. Both the audio and video driver are not first class - the audio driver lacks delay detection, and the video driver only supports a single YUV color space. Configure options: --disable-sdl2 to disable SDL 2.0+ detection, --disable-sdl to disable SDL 1.2+ detection. Both options need to be specified to turn off SDL support entirely.
135 lines
4.4 KiB
ReStructuredText
135 lines
4.4 KiB
ReStructuredText
.. _audio_outputs:
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AUDIO OUTPUT DRIVERS
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====================
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Audio output drivers are interfaces to different audio output facilities. The
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syntax is:
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--ao=<driver1[:suboption1[=value]:...],driver2,...[,]>
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Specify a priority list of audio output drivers to be used.
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If the list has a trailing ',' mpv will fall back on drivers not contained
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in the list. Suboptions are optional and can mostly be omitted.
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*NOTE*: See ``--ao=help`` for a list of compiled-in audio output drivers.
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*EXAMPLE*:
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- ``--ao=alsa,oss,`` Try the ALSA driver, then the OSS driver, then others.
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- ``--ao=alsa:noblock:device=hw=0.3`` Sets noblock-mode and the device-name
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as first card, fourth device.
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Available audio output drivers are:
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alsa
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ALSA 0.9/1.x audio output driver
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noblock
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Sets noblock-mode.
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device=<device>
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Sets the device name. Replace any ',' with '.' and any ':' with '=' in
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the ALSA device name. For hwac3 output via S/PDIF, use an "iec958" or
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"spdif" device, unless you really know how to set it correctly.
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oss
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OSS audio output driver
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<dsp-device>
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Sets the audio output device (default: ``/dev/dsp``).
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<mixer-device>
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Sets the audio mixer device (default: ``/dev/mixer``).
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<mixer-channel>
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Sets the audio mixer channel (default: pcm).
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jack
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audio output through JACK (Jack Audio Connection Kit)
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port=<name>
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Connects to the ports with the given name (default: physical ports).
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name=<client>
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Client name that is passed to JACK (default: mpv [<PID>]). Useful
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if you want to have certain connections established automatically.
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(no-)estimate
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Estimate the audio delay, supposed to make the video playback smoother
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(default: enabled).
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(no-)autostart
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Automatically start jackd if necessary (default: disabled). Note that
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this seems unreliable and will spam stdout with server messages.
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coreaudio (Mac OS X only)
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native Mac OS X audio output driver
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device_id=<id>
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ID of output device to use (0 = default device)
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help
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List all available output devices with their IDs.
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openal
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Experimental OpenAL audio output driver
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pulse
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PulseAudio audio output driver
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[<host>][:<output sink>]
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Specify the host and optionally output sink to use. An empty <host>
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string uses a local connection, "localhost" uses network transfer
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(most likely not what you want).
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portaudio
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PortAudio audio output driver. This works on all platforms, and has extensive
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MS Windows support.
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device
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Specify the subdevice to use. Giving ``help`` as device name lists all
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devices found by PortAudio. Devices can be given as numeric values,
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starting from ``1``.
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dsound (Windows only)
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DirectX DirectSound audio output driver
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device=<devicenum>
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Sets the device number to use. Playing a file with ``-v`` will show a
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list of available devices.
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sdl
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SDL 1.2+ audio output driver. Should work everywhere where SDL 1.2 builds,
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but may require the SDL_AUDIODRIVER environment variable to be set
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appropriately for your system.
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buflen=<length>
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Sets the audio buffer length in seconds. Is used only approximately,
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or even disaregarded entirely by the sound system. Playing a file with
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``-v`` will show the requested and obtained exact buffer size. A value
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of 0 selects the sound system default.
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bufcnt=<count>
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Sets the number of extra audio buffers in mpv. Usually needs not be
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changed.
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null
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Produces no audio output but maintains video playback speed. Use
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``--no-audio`` for benchmarking.
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pcm
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raw PCM/wave file writer audio output
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(no-)waveheader
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Include or do not include the wave header (default: included). When
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not included, raw PCM will be generated.
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file=<filename>
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Write the sound to <filename> instead of the default
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``audiodump.wav``. If nowaveheader is specified, the default is
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``audiodump.pcm``.
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rsound
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audio output to an RSound daemon
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host=<name/path>
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Set the address of the server (default: localhost). Can be either a
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network hostname for TCP connections or a Unix domain socket path
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starting with '/'.
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port=<number>
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Set the TCP port used for connecting to the server (default: 12345).
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Not used if connecting to a Unix domain socket.
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