mpv/DOCS/man/en/vo.rst

.. _video_outputs:

VIDEO OUTPUT DRIVERS
====================

Video output drivers are interfaces to different video output facilities. The
syntax is:

--vo=<driver1[:suboption1[=value]:...],driver2,...[,]>
    Specify a priority list of video output drivers to be used.

If the list has a trailing ',' MPlayer will fall back on drivers not contained
in the list. Suboptions are optional and can mostly be omitted.

*NOTE*: See ``--vo=help`` for a list of compiled-in video output drivers.

*EXAMPLE*:

    ``--vo=xmga,xv,``
        Try the Matrox X11 driver, then the Xv driver, then others.
    ``--vo=directx:noaccel``
        Uses the DirectX driver with acceleration features turned off.

Available video output drivers are:

xv (X11 only)
    Uses the XVideo extension to enable hardware accelerated playback. If you
    cannot use a hardware specific driver, this is probably the best option.
    For information about what colorkey is used and how it is drawn run
    MPlayer with ``-v`` option and look out for the lines tagged with ``[xv
    common]`` at the beginning.

    adaptor=<number>
        Select a specific XVideo adaptor (check xvinfo results).
    port=<number>
        Select a specific XVideo port.
    ck=<cur|use|set>
        Select the source from which the colorkey is taken (default: cur).

        cur
          The default takes the colorkey currently set in Xv.
        use
          Use but do not set the colorkey from MPlayer (use the ``--colorkey``
          option to change it).
        set
          Same as use but also sets the supplied colorkey.

    ck-method=<man|bg|auto>
        Sets the colorkey drawing method (default: man).

        man
          Draw the colorkey manually (reduces flicker in some cases).
        bg
          Set the colorkey as window background.
        auto
          Let Xv draw the colorkey.

x11 (X11 only)
    Shared memory video output driver without hardware acceleration that works
    whenever X11 is present.

vdpau (X11 only)
    Uses the VDPAU interface to display and optionally also decode video.
    Hardware decoding is used with ``--vc=ffmpeg12vdpau``,
    ``--vc=ffwmv3vdpau``, ``--vc=ffvc1vdpau``, ``--vc=ffh264vdpau`` or
    ``--vc=ffodivxvdpau``.

    sharpen=<-1-1>
        For positive values, apply a sharpening algorithm to the video, for
        negative values a blurring algorithm (default: 0).
    denoise=<0-1>
        Apply a noise reduction algorithm to the video (default: 0, no noise
        reduction).
    deint=<-4-4>
        Select deinterlacing mode (default: -3). Positive values choose mode
        and enable deinterlacing. Corresponding negative values select the
        same deinterlacing mode, but do not enable deinterlacing on startup
        (useful in configuration files to specify what mode will be enabled by
        the "D" key). All modes respect ``--field-dominance``.

        0
            same as -3
        1
            Show only first field, similar to ``--vf=field``.
        2
            Bob deinterlacing, similar to ``--vf=tfields=1``.
        3
            motion adaptive temporal deinterlacing. May lead to A/V desync
            with slow video hardware and/or high resolution.
        4
            motion adaptive temporal deinterlacing with edge-guided spatial
            interpolation. Needs fast video hardware.
    chroma-deint
        Makes temporal deinterlacers operate both on luma and chroma (default).
        Use no-chroma-deint to solely use luma and speed up advanced
        deinterlacing. Useful with slow video memory.
    pullup
        Try to apply inverse telecine, needs motion adaptive temporal
        deinterlacing.
    hqscaling=<0-9>
        0
            Use default VDPAU scaling (default).
        1-9
            Apply high quality VDPAU scaling (needs capable hardware).
    fps=<number>
        Override autodetected display refresh rate value (the value is needed
        for framedrop to allow video playback rates higher than display
        refresh rate, and for vsync-aware frame timing adjustments). Default 0
        means use autodetected value. A positive value is interpreted as a
        refresh rate in Hz and overrides the autodetected value. A negative
        value disables all timing adjustment and framedrop logic.
    composite-detect
        NVIDIA's current VDPAU implementation behaves somewhat differently
        under a compositing window manager and does not give accurate frame
        timing information. With this option enabled, the player tries to
        detect whether a compositing window manager is active. If one is
        detected, the player disables timing adjustments as if the user had
        specified fps=-1 (as they would be based on incorrect input). This
        means timing is somewhat less accurate than without compositing, but
        with the composited mode behavior of the NVIDIA driver there is no
        hard playback speed limit even without the disabled logic. Enabled by
        default, use no-composite-detect to disable.
    queuetime_windowed=<number> and queuetime_fs=<number>
        Use VDPAU's presentation queue functionality to queue future video
        frame changes at most this many milliseconds in advance (default: 50).
        See below for additional information.
    output_surfaces=<2-15>
        Allocate this many output surfaces to display video frames (default:
        3). See below for additional information.

    Using the VDPAU frame queueing functionality controlled by the queuetime
    options makes MPlayer's frame flip timing less sensitive to system CPU
    load and allows MPlayer to start decoding the next frame(s) slightly
    earlier which can reduce jitter caused by individual slow-to-decode
    frames. However the NVIDIA graphics drivers can make other window behavior
    such as window moves choppy if VDPAU is using the blit queue (mainly
    happens if you have the composite extension enabled) and this feature is
    active. If this happens on your system and it bothers you then you can set
    the queuetime value to 0 to disable this feature. The settings to use in
    windowed and fullscreen mode are separate because there should be less
    reason to disable this for fullscreen mode (as the driver issue shouldn't
    affect the video itself).

    You can queue more frames ahead by increasing the queuetime values and the
    output_surfaces count (to ensure enough surfaces to buffer video for a
    certain time ahead you need at least as many surfaces as the video has
    frames during that time, plus two). This could help make video smoother in
    some cases. The main downsides are increased video RAM requirements for
    the surfaces and laggier display response to user commands (display
    changes only become visible some time after they're queued). The graphics
    driver implementation may also have limits on the length of maximum
    queuing time or number of queued surfaces that work well or at all.

direct3d (Windows only) (BETA CODE!)
    Video output driver that uses the Direct3D interface (useful for Vista).

directx (Windows only)
    Video output driver that uses the DirectX interface.

    noaccel
        Turns off hardware acceleration. Try this option if you have display
        problems.

corevideo (Mac OS X 10.6 and later)
    Mac OS X CoreVideo video output driver. Uses the CoreVideo APIs to fill
    PixelBuffers and generate OpenGL textures from them (useful as a fallback
    for vo_gl_).

.. _vo_gl:
gl
    OpenGL video output driver, simple version. Video size must be smaller
    than the maximum texture size of your OpenGL implementation. Intended to
    work even with the most basic OpenGL implementations, but also makes use
    of newer extensions, which allow support for more colorspaces and direct
    rendering.

    The code performs very few checks, so if a feature does not work, this
    might be because it is not supported by your card/OpenGL implementation
    even if you do not get any error message. Use ``glxinfo`` or a similar
    tool to display the supported OpenGL extensions.

    (no-)ati-hack
        ATI drivers may give a corrupted image when PBOs are used (when using
        `force-pbo`). This option fixes this, at the expense of
        using a bit more memory.
    (no-)force-pbo
        Always uses PBOs to transfer textures even if this involves an extra
        copy. Currently this gives a little extra speed with NVidia drivers
        and a lot more speed with ATI drivers. May need ``--no-slices`` and
        the ati-hack suboption to work correctly.
    (no-)scaled-osd
        Changes the way the OSD behaves when the size of the window changes
        (default: disabled). When enabled behaves more like the other video
        output drivers, which is better for fixed-size fonts. Disabled looks
        much better with FreeType fonts and uses the borders in fullscreen
        mode. Does not work correctly with ass subtitles (see ``--ass``), you
        can instead render them without OpenGL support via ``--vf=ass``.
    osdcolor=<0xAARRGGBB>
        Color for OSD (default: 0x00ffffff, corresponds to non-transparent
        white).
    rectangle=<0,1,2>
        Select usage of rectangular textures which saves video RAM, but often
        is slower (default: 0).

        0
            Use power-of-two textures (default).
        1
            Use the ``GL_ARB_texture_rectangle`` extension.
        2
            Use the ``GL_ARB_texture_non_power_of_two`` extension. In some
            cases only supported in software and thus very slow.

    swapinterval=<n>
        Minimum interval between two buffer swaps, counted in displayed frames
        (default: 1). 1 is equivalent to enabling VSYNC, 0 to disabling VSYNC.
        Values below 0 will leave it at the system default. This limits the
        framerate to (horizontal refresh rate / n). Requires
        ``GLX_SGI_swap_control`` support to work. With some (most/all?)
        implementations this only works in fullscreen mode.
    ycbcr
        Use the ``GL_MESA_ycbcr_texture`` extension to convert YUV to RGB. In
        most cases this is probably slower than doing software conversion to
        RGB.
    yuv=<n>
        Select the type of YUV to RGB conversion. The default is
        auto-detection deciding between values 0 and 2.

        0
            Use software conversion. Compatible with all OpenGL versions.
            Provides brightness, contrast and saturation control.
        1
            Same as 2. This used to use nVidia-specific extensions, which
            didn't provide any advantages over using fragment programs, except
            possibly on very ancient graphic cards. It produced a gray-ish
            output, which is why it has been removed.
        2
            Use a fragment program. Needs the ``GL_ARB_fragment_program``
            extension and at least three texture units. Provides brightness,
            contrast, saturation and hue control.
        3
            Use a fragment program using the POW instruction. Needs the
            ``GL_ARB_fragment_program`` extension and at least three texture
            units. Provides brightness, contrast, saturation, hue and gamma
            control. Gamma can also be set independently for red, green and
            blue. Method 4 is usually faster.
        4
            Use a fragment program with additional lookup. Needs the
            ``GL_ARB_fragment_program`` extension and at least four texture
            units. Provides brightness, contrast, saturation, hue and gamma
            control. Gamma can also be set independently for red, green and
            blue.
        5
            Use ATI-specific method (for older cards). This uses an
            ATI-specific extension (``GL_ATI_fragment_shader`` - not
            ``GL_ARB_fragment_shader``!). At least three texture units are
            needed. Provides saturation and hue control. This method is fast
            but inexact.
        6
            Use a 3D texture to do conversion via lookup. Needs the
            ``GL_ARB_fragment_program extension`` and at least four texture
            units. Extremely slow (software emulation) on some (all?) ATI
            cards since it uses a texture with border pixels. Provides
            brightness, contrast, saturation, hue and gamma control. Gamma can
            also be set independently for red, green and blue. Speed depends
            more on GPU memory bandwidth than other methods.

    lscale=<n>
        Select the scaling function to use for luminance scaling. Only valid
        for yuv modes 2, 3, 4 and 6.

        0
            Use simple linear filtering (default).
        1
            Use bicubic B-spline filtering (better quality). Needs one
            additional texture unit. Older cards will not be able to handle
            this for chroma at least in fullscreen mode.
        2
            Use cubic filtering in horizontal, linear filtering in vertical
            direction. Works on a few more cards than method 1.
        3
            Same as 1 but does not use a lookup texture. Might be faster on
            some cards.
        4
            Use experimental unsharp masking with 3x3 support and a default
            strength of 0.5 (see `filter-strength`).
        5
            Use experimental unsharp masking with 5x5 support and a default
            strength of 0.5 (see `filter-strength`).

    cscale=<n>
        Select the scaling function to use for chrominance scaling. For
        details see `lscale`.
    filter-strength=<value>
        Set the effect strength for the `lscale`/`cscale` filters that support
        it.
    stereo=<value>
        Select a method for stereo display. You may have to use ``--aspect`` to
        fix the aspect value. Experimental, do not expect too much from it.

        0
            Normal 2D display
        1
            Convert side by side input to full-color red-cyan stereo.
        2
            Convert side by side input to full-color green-magenta stereo.
        3
            Convert side by side input to quadbuffered stereo. Only supported
            by very few OpenGL cards.

    The following options are only useful if writing your own fragment
    programs.

    customprog=<filename>
        Load a custom fragment program from <filename>. See
        ``TOOLS/edgedect.fp`` for an example.
    customtex=<filename>
        Load a custom "gamma ramp" texture from <filename>. This can be used
        in combination with yuv=4 or with the customprog option.
    (no-)customtlin
        If enabled (default) use ``GL_LINEAR`` interpolation, otherwise use
        ``GL_NEAREST`` for customtex texture.
    (no-)customtrect
        If enabled, use texture_rectangle for customtex texture. Default is
        disabled.
    (no-)mipmapgen
        If enabled, mipmaps for the video are automatically generated. This
        should be useful together with the customprog and the TXB instruction
        to implement blur filters with a large radius. For most OpenGL
        implementations this is very slow for any non-RGB formats. Default is
        disabled.

    Normally there is no reason to use the following options, they mostly
    exist for testing purposes.

    (no-)glfinish
        Call ``glFinish()`` before swapping buffers. Slower but in some cases
        more correct output (default: disabled).
    (no-)manyfmts
        Enables support for more (RGB and BGR) color formats (default:
        enabled). Needs OpenGL version >= 1.2.
    slice-height=<0-...>
        Number of lines copied to texture in one piece (default: 0). 0 for
        whole image.

        *NOTE*: If YUV colorspace is used (see `yuv` suboption), special rules
        apply: If the decoder uses slice rendering (see ``--no-slices``), this
        setting has no effect, the size of the slices as provided by the
        decoder is used. If the decoder does not use slice rendering, the
        default is 16.
    (no-)osd
        Enable or disable support for OSD rendering via OpenGL (default:
        enabled). This option is for testing; to disable the OSD use
        ``--osdlevel=0`` instead.

null
    Produces no video output. Useful for benchmarking.

caca
    Color ASCII art video output driver that works on a text console.

directfb
    Play video using the DirectFB library.

    (no-)input
        Use the DirectFB instead of the MPlayer keyboard code (default:
        enabled).
    buffermode=single|double|triple
        Double and triple buffering give best results if you want to avoid
        tearing issues. Triple buffering is more efficient than double
        buffering as it does not block MPlayer while waiting for the vertical
        retrace. Single buffering should be avoided (default: single).
    fieldparity=top|bottom
        Control the output order for interlaced frames (default: disabled).
        Valid values are top = top fields first, bottom = bottom fields first.
        This option does not have any effect on progressive film material like
        most MPEG movies are. You need to enable this option if you have
        tearing issues or unsmooth motions watching interlaced film material.
    layer=N
        Will force layer with ID N for playback (default: -1 - auto).
    dfbopts=<list>
        Specify a parameter list for DirectFB.

v4l2 (requires Linux 2.6.22+ kernel)
    Video output driver for V4L2 compliant cards with built-in hardware MPEG
    decoder. See also the lavc video filter.

    <device>
        Explicitly choose the MPEG decoder device name to use (default:
        ``/dev/video16``).
    <output>
        Explicitly choose the TV-out output to be used for the video signal.

image
    Output each frame into an image file in the current directory. Each file
    takes the frame number padded with leading zeros as name.

    format=<format>
        Select the image file format.

        jpg
            JPEG files, extension .jpg.
        jpeg
            JPEG files, extension .jpeg.
        png
            PNG files.
        ppm
            Portable bitmap format.
        pgm
            Portable graymap format.
        pgmyuv
            Portable graymap format, using the YV12 pixel format.
        tga
            Truevision TGA.

    png-compression=<0-9>
        PNG compression factor (speed vs. file size tradeoff) (default: 7)
    jpeg-quality=<0-100>
        JPEG quality factor (default: 85)
    [no-]jpeg-progressive
        Specify standard or progressive JPEG (default: noprogressive).
    [no-]jpeg-baseline
        Specify use of JPEG baseline or not (default: baseline).
    jpeg-optimize=<0-100>
        JPEG ptimization factor (default: 100)
    jpeg-smooth=<0-100>
        smooth factor (default: 0)
    jpeg-dpi=<1->
        JPEG DPI (default: 72)
    outdir=<dirname>
        Specify the directory to save the image files to (default: ``./``).

sharedbuffer (Mac OS X 10.6 and later)
    Mac OS X headless video output designed to interact with GUIs. It copies
    image data to a shared buffer so that the data can be read from a GUI and
    rendered.

    It uses the same protocol as MPlayer's ``-vo corevideo:shared_buffer``

    buffer_name=<buffer_name>
        Name of the shared buffer created with shm_open() as well as the name
        of the NSConnection mplayer2 will try to open (default: mplayerosx).