Man / AUDIO OUTPUT OPTIONS

AUDIO OUTPUT OPTIONS (MPLAYER ONLY) †

-abs <value> (-ao oss only) (OBSOLETE) †

原文
Override audio driver/card buffer size detection.

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-format <format> (also see the format audio filter) †

原文
Select the sample format used for output from the audio filter layer to the sound card. The values that <format> can adopt are listed below in the description of the format audio filter.

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-mixer <device> †

原文
Use a mixer device different from the default /dev/mixer. For ALSA this is the mixer name.

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-mixer-channel <mixer line>[,mixer index] (-ao oss and -ao alsa only) †

原文
This option will tell MPlayer to use a different channel for controlling volume than the default PCM. Options for OSS include vol, pcm, line. For a complete list of options look for SOUND_DEVICE_NAMES in /usr/include/linux/soundcard.h. For ALSA you can use the names e.g. alsamixer displays, like Master, Line, PCM.
NOTE: ALSA mixer channel names followed by a number must be specified in the <name,number> format, i.e. a channel labeled ’PCM 1’ in alsamixer must be converted to PCM,1.

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-softvol †

原文
Force the use of the software mixer, instead of using the sound card mixer.

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-softvol-max <10.0-10000.0> †

原文
Set the maximum amplification level in percent (default: 110). A value of 200 will allow you to adjust the volume up to a maximum of double the current level. With values below 100 the initial volume (which is 100%) will be above the maximum, which e.g. the OSD cannot display correctly.

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-volstep <0-100> †

原文
Set the step size of mixer volume changes in percent of the whole range (default: 3).

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