mpv/DOCS/tech/slave.txt

SLAVE MODE PROTOCOL
-------------------

FIXME: Some of these options are still not documented, patches welcome.

Most slave mode commands are equivalent to command line options.
Have a look at the man page for more detailed descriptions.

If the -slave option is given, playback is controlled by a line-based protocol.
Each line must contain one of the following commands:

seek <value> [<type>]
    Seek to some place in the movie.
        0 is a relative seek of +/- <value> seconds (default).
        1 is a seek to <value> % in the movie.
        2 is a seek to an absolute position of <value> seconds.

speed_set <value>
    Set the speed to <value>.

speed_incr <value>
    Add <value> to the current playback speed.

speed_mult <value>
    Multiply the current speed by <value>.

edl_mark
    ???

audio_delay <value>
    Adjust the audio delay by <value> seconds.

quit [<value>]
    Quit MPlayer. The optional integer value is used as the return code
    for the mplayer process (default: 0).

pause
    Pause/unpause the playback.

frame_step
    Play one frame, then pause again.

grab_frames
    ???

pt_step <value> [<force>]
    Go to the next/previous entry in the playtree. The sign of <value> tells
    the direction.  If no entry is available in the given direction it will do
    nothing unless force is non-zero.

pt_up_step <value> [<force>]
    Similar to pt_step but jumps to the next/previous entry in the parent list.
    Useful to break out of the inner loop in the playtree.

alt_src_step <value> (ASX playlist only)
    When more than one source is available it selects the next/previous one.

sub_delay <value> [<abs>]
    Adjust the subtitle delay by +/- <value> seconds or set it to <value>
    seconds when <abs> is nonzero.

sub_step
    ???

osd [<level>]
    Toggle OSD mode or set it to level when <level> >= 0.

osd_show_text <value>
    ???

volume <value>
    Increase/decrease volume.

use_master
    Switch volume control between master and PCM.

mute
    Mute/unmute sound output.

[contrast|gamma|brightness|hue|saturation] <-100 - 100> [<abs>]
    Set/adjust video parameters.

frame_drop [<value>]
    Toggle/set frame dropping mode.

sub_pos <value>
    Adjust subtitle position.

sub_alignment <value>
    Set subtitle alignment.

sub_visibility
    Toggle subtitle visibility.

get_sub_visibility
    Print out subtitle visibility (1 == on, 0 == off).

sub_select
    Cycle through the available subtitles. Supported subtitle sources are
    -sub options on the command line, VOBsubs, DVD subtitles, and Ogg text
    streams.

vobsub_lang
    This is a stub linked to sub_select for backwards compatibility.

get_percent_pos
    Print out the current position in the file, as integer percentage [0-100).

get_time_length
    Print out the length of the current file in seconds.

vo_fullscreen
    Switch to fullscreen mode.

get_vo_fullscreen
    Print out fullscreen status (1 == fullscreened, 0 == windowed).

vo_ontop
    Toggle stay-on-top.

vo_rootwin
    Toggle playback on the root window.

switch_vsync [<value>]
    Toggle vsync (1 == on, 0 == off). If no value is provided,
    vsync status is inverted.

switch_ratio [<value>]
    Change aspect ratio at runtime. Value is the new aspect ratio expressed
    as a float (e.g. 1.77778 for 16/9).
    There might be problems with some video filters.

panscan <value> [value2]
    ???

loadfile <file|url>
    Load the given file/URL.

loadlist <file>
    Load the given playlist file.

change_rectangle <val1> <val2>
    Change the position of the rectangle filter rectangle.
        <val1>
            Must be one of the following:
                0 = width
                1 = height
                2 = x position
                3 = y position
        <val2>
            If <val1> is 0 or 1:
                Integer amount to add/subtract from the width/height.
                Positive values add to width/height and negative values
                subtract from it.
            If <val1> is 2 or 3:
                Relative integer amount by which to move the upper left
                rectangle corner. Positive values move the rectangle
                right/down and negative values move the rectangle left/up.

dvdnav <button>
    Press the given dvdnav button.
        1 up
        2 down
        3 left
        4 right
        5 menu
        6 select

dvdnav_event <value>
    ???

tv_step_channel <channel>
    Select next/previous TV channel.

tv_step_norm
    Change TV norm.

tv_step_chanlist
    Change channel list.

tv_set_channel <channel>
    Set the current TV channel.

tv_last_channel
    Set the current TV channel to the last one.

tv_set_freq <frequency in MHz>
    Set the TV tuner frequency.

tv_set_norm <norm>
    Set the TV tuner norm (PAL, SECAM, NTSC, ...).

tv_set_brightness <-100 - 100>
    Set TV tuner brightness.

tv_set_contrast <-100 -100>
    Set TV tuner contrast.

tv_set_hue <-100 - 100>
    Set TV tuner hue.

tv_set_saturation <-100 - 100>
    Set TV tuner saturation.

gui_[loadfile|loadsubtitle|about|play|stop|gui_playlist|gui_preferences|skinbrowser]
    GUI actions

forced_subs_only
    Display forced subtitles only.

dvb_set_channel <channel_number> <card_number>
    Set DVB channel.

screenshot
    Take a screenshot.

menu <value>
    ???

set_menu <value>
    ???

help
    ???

exit
    ???

hide
    ???

run <value>
    ???