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ON SCREEN CONTROLLER
====================

The On Screen Controller (short: OSC) is a minimal GUI integrated with mpv to
offer basic mouse-controllability. It is intended to make interaction easier
for new users and to enable precise and direct seeking.

The OSC is enabled by default if mpv was compiled with Lua support. It can be
disabled entirely using the ``--osc=no`` option.

Using the OSC
-------------

By default, the OSC will show up whenever the mouse is moved inside the
player window and will hide if the mouse is not moved outside the OSC for
0.5 seconds or if the mouse leaves the window.

The Interface
~~~~~~~~~~~~~

::

    +---------+----------+------------------------------------------+----------+
    | pl prev | pl next  |  title                                   |    cache |
    +------+--+---+------+---------+-----------+------+-------+-----+-----+----+
    | play | skip | skip | time    |  seekbar  | time | audio | sub | vol | fs |
    |      | back | frwd | elapsed |           | left |       |     |     |    |
    +------+------+------+---------+-----------+------+-------+-----+-----+----+


pl prev
    =============   ================================================
    left-click      play previous file in playlist
    right-click     show playlist
    shift+L-click   show playlist
    =============   ================================================

pl next
    =============   ================================================
    left-click      play next file in playlist
    right-click     show playlist
    shift+L-click   show playlist
    =============   ================================================

title
    | Displays current media-title, filename, or custom title

    =============   ================================================
    left-click      show playlist position and length and full title
    right-click     show filename
    =============   ================================================

cache
    | Shows current cache fill status

play
    =============   ================================================
    left-click      toggle play/pause
    =============   ================================================

skip back
    =============   ================================================
    left-click      go to beginning of chapter / previous chapter
    right-click     show chapters
    shift+L-click   show chapters
    =============   ================================================

skip frwd
    =============   ================================================
    left-click      go to next chapter
    right-click     show chapters
    shift+L-click   show chapters
    =============   ================================================

time elapsed
    | Shows current playback position timestamp

    =============   ================================================
    left-click      toggle displaying timecodes with milliseconds
    =============   ================================================

seekbar
    | Indicates current playback position and position of chapters

    =============   ================================================
    left-click      seek to position
    =============   ================================================

time left
    | Shows remaining playback time timestamp

    =============   ================================================
    left-click      toggle between total and remaining time
    =============   ================================================

audio and sub
    | Displays selected track and amount of available tracks

    =============   ================================================
    left-click      cycle audio/sub tracks forward
    right-click     cycle audio/sub tracks backwards
    shift+L-click   show available audio/sub tracks
    =============   ================================================

vol
    =============   ================================================
    left-click      toggle mute
    mouse wheel     volume up/down
    =============   ================================================

fs
    =============   ================================================
    left-click      toggle fullscreen
    =============   ================================================

Key Bindings
~~~~~~~~~~~~

These key bindings are active by default if nothing else is already bound to
these keys. In case of collision, the function needs to be bound to a
different key. See the `Script Commands`_ section.

=============   ================================================
del             Cycles visibility between never / auto (mouse-move) / always
=============   ================================================

Configuration
-------------

The OSC offers limited configuration through a config file
``lua-settings/osc.conf`` placed in mpv's user dir and through the
``--script-opts`` command-line option. Options provided through the command-line
will override those from the config file.

Config Syntax
~~~~~~~~~~~~~

The config file must exactly follow the following syntax::

    # this is a comment
    optionA=value1
    optionB=value2

``#`` can only be used at the beginning of a line and there may be no
spaces around the ``=`` or anywhere else.

Command-line Syntax
~~~~~~~~~~~~~~~~~~~

To avoid collisions with other scripts, all options need to be prefixed with
``osc-``.

Example::

    --script-opts=osc-optionA=value1,osc-optionB=value2


Configurable Options
~~~~~~~~~~~~~~~~~~~~

``layout``
    Default: bottombar

    The layout for the OSC. Currently available are: box, slimbox,
    bottombar and topbar. Default pre-0.21.0 was 'box'.

``seekbarstyle``
    Default: bar

    Sets the style of the seekbar, slider (diamond marker), knob (circle
    marker with guide), or bar (fill).
    Default pre-0.21.0 was 'slider'.

``seekbarkeyframes``
    Default: yes

    Controls the mode used to seek when dragging the seekbar. By default,
    keyframes are used. If set to false, exact seeking on mouse drags
    will be used instead. Keyframes are preferred, but exact seeks may be
    useful in cases where keyframes cannot be found. Note that using exact
    seeks can potentially make mouse dragging much slower.

``deadzonesize``
    Default: 0.5

    Size of the deadzone. The deadzone is an area that makes the mouse act
    like leaving the window. Movement there won't make the OSC show up and
    it will hide immediately if the mouse enters it. The deadzone starts
    at the window border opposite to the OSC and the size controls how much
    of the window it will span. Values between 0.0 and 1.0, where 0 means the
    OSC will always popup with mouse movement in the window, and 1 means the
    OSC will only show up when the mouse hovers it. Default pre-0.21.0 was 0.

``minmousemove``
    Default: 0

    Minimum amount of pixels the mouse has to move between ticks to make
    the OSC show up. Default pre-0.21.0 was 3.

``showwindowed``
    Default: yes

    Enable the OSC when windowed

``showfullscreen``
    Default: yes

    Enable the OSC when fullscreen

``scalewindowed``
    Default: 1.0

    Scale factor of the OSC when windowed.

``scalefullscreen``
    Default: 1.0

    Scale factor of the OSC when fullscreen

``scaleforcedwindow``
    Default: 2.0

    Scale factor of the OSC when rendered on a forced (dummy) window

``vidscale``
    Default: yes

    Scale the OSC with the video
    ``no`` tries to keep the OSC size constant as much as the window size allows

``valign``
    Default: 0.8

    Vertical alignment, -1 (top) to 1 (bottom)

``halign``
    Default: 0.0

    Horizontal alignment, -1 (left) to 1 (right)

``barmargin``
    Default: 0

    Margin from bottom (bottombar) or top (topbar), in pixels

``boxalpha``
    Default: 80

    Alpha of the background box, 0 (opaque) to 255 (fully transparent)

``hidetimeout``
    Default: 500

    Duration in ms until the OSC hides if no mouse movement, must not be
    negative

``fadeduration``
    Default: 200

    Duration of fade out in ms, 0 = no fade

``title``
    Default: ${media-title}

    String that supports property expansion that will be displayed as
    OSC title.
    ASS tags are escaped, and newlines and trailing slashes are stripped.

``tooltipborder``
    Default: 1

    Size of the tooltip outline when using bottombar or topbar layouts

``timetotal``
    Default: no

    Show total time instead of time remaining

``timems``
    Default: no

    Display timecodes with milliseconds

``seekranges``
    Default: yes

    Display seekable ranges on the seekbar

``visibility``
    Default: auto (auto hide/show on mouse move)

    Also supports ``never`` and ``always``

``boxmaxchars``
    Default: 80

    Max chars for the osc title at the box layout. mpv does not measure the
    text width on screen and so it needs to limit it by number of chars. The
    default is conservative to allow wide fonts to be used without overflow.
    However, with many common fonts a bigger number can be used. YMMV.

Script Commands
~~~~~~~~~~~~~~~

The OSC script listens to certain script commands. These commands can bound
in ``input.conf``, or sent by other scripts.

``osc-message``
    Show a message on screen using the OSC. First argument is the message,
    second the duration in seconds.

``osc-visibility``
    Controls visibility mode ``never`` / ``auto`` (on mouse move) / ``always``
    and also ``cycle`` to cycle between the modes

Example

You could put this into ``input.conf`` to hide the OSC with the ``a`` key and
to set auto mode (the default) with ``b``::

    a script-message osc-visibility never
    b script-message osc-visibility auto

``osc-playlist``, ``osc-chapterlist``, ``osc-tracklist``
    Shows a limited view of the respective type of list using the OSC. First
    argument is duration in seconds.