mirror of https://github.com/mpv-player/mpv
796 lines
36 KiB
ReStructuredText
796 lines
36 KiB
ReStructuredText
VIDEO FILTERS
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=============
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Video filters allow you to modify the video stream and its properties. All of
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the information described in this section applies to audio filters as well
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(generally using the prefix ``--af`` instead of ``--vf``).
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The exact syntax is:
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``--vf=<filter1[=parameter1:parameter2:...],filter2,...>``
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Setup a chain of video filters. This consists on the filter name, and an
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option list of parameters after ``=``. The parameters are separated by
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``:`` (not ``,``, as that starts a new filter entry).
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Before the filter name, a label can be specified with ``@name:``, where
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name is an arbitrary user-given name, which identifies the filter. This
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is only needed if you want to toggle the filter at runtime.
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A ``!`` before the filter name means the filter is disabled by default. It
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will be skipped on filter creation. This is also useful for runtime filter
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toggling.
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See the ``vf`` command (and ``toggle`` sub-command) for further explanations
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and examples.
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The general filter entry syntax is:
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``["@"<label-name>":"] ["!"] <filter-name> [ "=" <filter-parameter-list> ]``
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or for the special "toggle" syntax (see ``vf`` command):
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``"@"<label-name>``
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and the ``filter-parameter-list``:
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``<filter-parameter> | <filter-parameter> "," <filter-parameter-list>``
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and ``filter-parameter``:
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``( <param-name> "=" <param-value> ) | <param-value>``
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``param-value`` can further be quoted in ``[`` / ``]`` in case the value
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contains characters like ``,`` or ``=``. This is used in particular with
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the ``lavfi`` filter, which uses a very similar syntax as mpv (MPlayer
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historically) to specify filters and their parameters.
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Filters can be manipulated at run time. You can use ``@`` labels as described
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above in combination with the ``vf`` command (see `COMMAND INTERFACE`_) to get
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more control over this. Initially disabled filters with ``!`` are useful for
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this as well.
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You can also set defaults for each filter. The defaults are applied before the
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normal filter parameters. This is deprecated and never worked for the
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libavfilter bridge.
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``--vf-defaults=<filter1[=parameter1:parameter2:...],filter2,...>``
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Set defaults for each filter. (Deprecated. ``--af-defaults`` is deprecated
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as well.)
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.. note::
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To get a full list of available video filters, see ``--vf=help`` and
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https://ffmpeg.org/ffmpeg-filters.html .
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Also, keep in mind that most actual filters are available via the ``lavfi``
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wrapper, which gives you access to most of libavfilter's filters. This
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includes all filters that have been ported from MPlayer to libavfilter.
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Most builtin filters are deprecated in some ways, unless they're only available
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in mpv (such as filters which deal with mpv specifics, or which are
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implemented in mpv only).
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If a filter is not builtin, the ``lavfi-bridge`` will be automatically
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tried. This bridge does not support help output, and does not verify
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parameters before the filter is actually used. Although the mpv syntax
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is rather similar to libavfilter's, it's not the same. (Which means not
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everything accepted by vf_lavfi's ``graph`` option will be accepted by
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``--vf``.)
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You can also prefix the filter name with ``lavfi-`` to force the wrapper.
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This is helpful if the filter name collides with a deprecated mpv builtin
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filter. For example ``--vf=lavfi-scale=args`` would use libavfilter's
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``scale`` filter over mpv's deprecated builtin one.
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Video filters are managed in lists. There are a few commands to manage the
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filter list.
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``--vf-append=filter``
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Appends the filter given as arguments to the filter list.
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``--vf-add=filter``
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Appends the filter given as arguments to the filter list. (Passing multiple
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filters is currently still possible, but deprecated.)
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``--vf-pre=filter``
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Prepends the filters given as arguments to the filter list. (Passing
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multiple filters is currently still possible, but deprecated.)
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``--vf-remove=filter``
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Deletes the filter from the list. The filter can be either given the way it
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was added (filter name and its full argument list), or by label (prefixed
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with ``@``). Matching of filters works as follows: if either of the compared
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filters has a label set, only the labels are compared. If none of the
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filters have a label, the filter name, arguments, and argument order are
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compared. (Passing multiple filters is currently still possible, but
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deprecated.)
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``-vf-toggle=filter``
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Add the given filter to the list if it was not present yet, or remove it
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from the list if it was present. Matching of filters works as described in
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``--vf-remove``.
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``--vf-del=filter``
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Sort of like ``--vf-remove``, but also accepts an index number. Index
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numbers start at 0, negative numbers address the end of the list (-1 is the
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last). Deprecated.
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``--vf-clr``
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Completely empties the filter list.
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With filters that support it, you can access parameters by their name.
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``--vf=<filter>=help``
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Prints the parameter names and parameter value ranges for a particular
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filter.
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Available mpv-only filters are:
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``format=fmt=<value>:colormatrix=<value>:...``
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Applies video parameter overrides, with optional conversion. By default,
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this overrides the video's parameters without conversion (except for the
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``fmt`` parameter), but can be made to perform an appropriate conversion
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with ``convert=yes`` for parameters for which conversion is supported.
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``<fmt>``
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Image format name, e.g. rgb15, bgr24, 420p, etc. (default: don't change).
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This filter always performs conversion to the given format.
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.. note::
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For a list of available formats, use ``--vf=format=fmt=help``.
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.. note::
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Conversion between hardware formats is supported in some cases.
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eg: ``cuda`` to ``vulkan``, or ``vaapi`` to ``vulkan``.
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``<convert=yes|no>``
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Force conversion of color parameters (default: no).
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If this is disabled (the default), the only conversion that is possibly
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performed is format conversion if ``<fmt>`` is set. All other parameters
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(like ``<colormatrix>``) are forced without conversion. This mode is
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typically useful when files have been incorrectly tagged.
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If this is enabled, libswscale or zimg is used if any of the parameters
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mismatch. zimg is used of the input/output image formats are supported
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by mpv's zimg wrapper, and if ``--sws-allow-zimg=yes`` is used. Both
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libraries may not support all kinds of conversions. This typically
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results in silent incorrect conversion. zimg has in many cases a better
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chance of performing the conversion correctly.
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In both cases, the color parameters are set on the output stage of the
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image format conversion (if ``fmt`` was set). The difference is that
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with ``convert=no``, the color parameters are not passed on to the
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converter.
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If input and output video parameters are the same, conversion is always
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skipped.
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When converting between hardware formats, this parameter has no effect,
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and the only conversion that is done is the format conversion.
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.. admonition:: Examples
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``mpv test.mkv --vf=format:colormatrix=ycgco``
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Results in incorrect colors (if test.mkv was tagged correctly).
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``mpv test.mkv --vf=format:colormatrix=ycgco:convert=yes --sws-allow-zimg``
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Results in true conversion to ``ycgco``, assuming the renderer
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supports it (``--vo=gpu`` normally does). You can add ``--vo=xv``
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to force a VO which definitely does not support it, which should
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show incorrect colors as confirmation.
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Using ``--sws-allow-zimg=no`` (or disabling zimg at build time)
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will use libswscale, which cannot perform this conversion as
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of this writing.
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``<colormatrix>``
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Controls the YUV to RGB color space conversion when playing video. There
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are various standards. Normally, BT.601 should be used for SD video, and
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BT.709 for HD video. (This is done by default.) Using incorrect color space
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results in slightly under or over saturated and shifted colors.
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These options are not always supported. Different video outputs provide
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varying degrees of support. The ``gpu`` and ``vdpau`` video output
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drivers usually offer full support. The ``xv`` output can set the color
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space if the system video driver supports it, but not input and output
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levels. The ``scale`` video filter can configure color space and input
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levels, but only if the output format is RGB (if the video output driver
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supports RGB output, you can force this with ``-vf scale,format=rgba``).
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If this option is set to ``auto`` (which is the default), the video's
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color space flag will be used. If that flag is unset, the color space
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will be selected automatically. This is done using a simple heuristic that
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attempts to distinguish SD and HD video. If the video is larger than
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1279x576 pixels, BT.709 (HD) will be used; otherwise BT.601 (SD) is
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selected.
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Available color spaces are:
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:auto: automatic selection (default)
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:bt.601: ITU-R BT.601 (SD)
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:bt.709: ITU-R BT.709 (HD)
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:bt.2020-ncl: ITU-R BT.2020 non-constant luminance system
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:bt.2020-cl: ITU-R BT.2020 constant luminance system
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:smpte-240m: SMPTE-240M
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``<colorlevels>``
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YUV color levels used with YUV to RGB conversion. This option is only
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necessary when playing broken files which do not follow standard color
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levels or which are flagged wrong. If the video does not specify its
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color range, it is assumed to be limited range.
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The same limitations as with ``<colormatrix>`` apply.
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Available color ranges are:
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:auto: automatic selection (normally limited range) (default)
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:limited: limited range (16-235 for luma, 16-240 for chroma)
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:full: full range (0-255 for both luma and chroma)
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``<primaries>``
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RGB primaries the source file was encoded with. Normally this should be set
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in the file header, but when playing broken or mistagged files this can be
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used to override the setting.
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This option only affects video output drivers that perform color
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management, for example ``gpu`` with the ``target-prim`` or
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``icc-profile`` suboptions set.
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If this option is set to ``auto`` (which is the default), the video's
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primaries flag will be used. If that flag is unset, the color space will
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be selected automatically, using the following heuristics: If the
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``<colormatrix>`` is set or determined as BT.2020 or BT.709, the
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corresponding primaries are used. Otherwise, if the video height is
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exactly 576 (PAL), BT.601-625 is used. If it's exactly 480 or 486 (NTSC),
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BT.601-525 is used. If the video resolution is anything else, BT.709 is
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used.
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Available primaries are:
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:auto: automatic selection (default)
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:bt.601-525: ITU-R BT.601 (SD) 525-line systems (NTSC, SMPTE-C)
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:bt.601-625: ITU-R BT.601 (SD) 625-line systems (PAL, SECAM)
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:bt.709: ITU-R BT.709 (HD) (same primaries as sRGB)
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:bt.2020: ITU-R BT.2020 (UHD)
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:apple: Apple RGB
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:adobe: Adobe RGB (1998)
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:prophoto: ProPhoto RGB (ROMM)
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:cie1931: CIE 1931 RGB
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:dci-p3: DCI-P3 (Digital Cinema)
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:v-gamut: Panasonic V-Gamut primaries
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``<gamma>``
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Gamma function the source file was encoded with. Normally this should be set
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in the file header, but when playing broken or mistagged files this can be
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used to override the setting.
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This option only affects video output drivers that perform color management.
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If this option is set to ``auto`` (which is the default), the gamma will
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be set to BT.1886 for YCbCr content, sRGB for RGB content and Linear for
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XYZ content.
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Available gamma functions are:
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:auto: automatic selection (default)
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:bt.1886: ITU-R BT.1886 (EOTF corresponding to BT.601/BT.709/BT.2020)
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:srgb: IEC 61966-2-4 (sRGB)
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:linear: Linear light
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:gamma1.8: Pure power curve (gamma 1.8)
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:gamma2.0: Pure power curve (gamma 2.0)
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:gamma2.2: Pure power curve (gamma 2.2)
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:gamma2.4: Pure power curve (gamma 2.4)
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:gamma2.6: Pure power curve (gamma 2.6)
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:gamma2.8: Pure power curve (gamma 2.8)
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:prophoto: ProPhoto RGB (ROMM) curve
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:pq: ITU-R BT.2100 PQ (Perceptual quantizer) curve
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:hlg: ITU-R BT.2100 HLG (Hybrid Log-gamma) curve
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:v-log: Panasonic V-Log transfer curve
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:s-log1: Sony S-Log1 transfer curve
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:s-log2: Sony S-Log2 transfer curve
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``<sig-peak>``
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Reference peak illumination for the video file, relative to the
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signal's reference white level. This is mostly interesting for HDR, but
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it can also be used tone map SDR content to simulate a different
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exposure. Normally inferred from tags such as MaxCLL or mastering
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metadata.
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The default of 0.0 will default to the source's nominal peak luminance.
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``<light>``
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Light type of the scene. This is mostly correctly inferred based on the
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gamma function, but it can be useful to override this when viewing raw
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camera footage (e.g. V-Log), which is normally scene-referred instead
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of display-referred.
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Available light types are:
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:auto: Automatic selection (default)
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:display: Display-referred light (most content)
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:hlg: Scene-referred using the HLG OOTF (e.g. HLG content)
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:709-1886: Scene-referred using the BT709+BT1886 interaction
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:gamma1.2: Scene-referred using a pure power OOTF (gamma=1.2)
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``<dolbyvision=yes|no>``
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Whether or not to include Dolby Vision metadata (default: yes). If
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disabled, any Dolby Vision metadata will be stripped from frames.
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``<film-grain=yes|no>``
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Whether or not to include film grain metadata (default: yes). If
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disabled, any film grain metadata will be stripped from frames.
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``<stereo-in>``
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Set the stereo mode the video is assumed to be encoded in. Use
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``--vf=format:stereo-in=help`` to list all available modes. Check with
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the ``stereo3d`` filter documentation to see what the names mean.
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``<stereo-out>``
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Set the stereo mode the video should be displayed as. Takes the
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same values as the ``stereo-in`` option.
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``<rotate>``
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Set the rotation the video is assumed to be encoded with in degrees.
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The special value ``-1`` uses the input format.
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``<w>``, ``<h>``
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If not 0, perform conversion to the given size. Ignored if
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``convert=yes`` is not set.
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``<dw>``, ``<dh>``
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Set the display size. Note that setting the display size such that
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the video is scaled in both directions instead of just changing the
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aspect ratio is an implementation detail, and might change later.
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``<dar>``
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Set the display aspect ratio of the video frame. This is a float,
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but values such as ``[16:9]`` can be passed too (``[...]`` for quoting
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to prevent the option parser from interpreting the ``:`` character).
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``<force-scaler=auto|zimg|sws>``
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Force a specific scaler backend, if applicable. This is a debug option
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and could go away any time.
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``<alpha=auto|straight|premul>``
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Set the kind of alpha the video uses. Undefined effect if the image
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format has no alpha channel (could be ignored or cause an error,
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depending on how mpv internals evolve). Setting this may or may not
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cause downstream image processing to treat alpha differently, depending
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on support. With ``convert`` and zimg used, this will convert the alpha.
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libswscale and other FFmpeg components completely ignore this.
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``lavfi=graph[:sws-flags[:o=opts]]``
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Filter video using FFmpeg's libavfilter.
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``<graph>``
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The libavfilter graph string. The filter must have a single video input
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pad and a single video output pad.
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See `<https://ffmpeg.org/ffmpeg-filters.html>`_ for syntax and available
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filters.
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.. warning::
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If you want to use the full filter syntax with this option, you have
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to quote the filter graph in order to prevent mpv's syntax and the
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filter graph syntax from clashing. To prevent a quoting and escaping
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mess, consider using ``--lavfi-complex`` if you know which video
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track you want to use from the input file. (There is only one video
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track for nearly all video files anyway.)
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.. admonition:: Examples
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``--vf=lavfi=[gradfun=20:30,vflip]``
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``gradfun`` filter with nonsense parameters, followed by a
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``vflip`` filter. (This demonstrates how libavfilter takes a
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graph and not just a single filter.) The filter graph string is
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quoted with ``[`` and ``]``. This requires no additional quoting
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or escaping with some shells (like bash), while others (like
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zsh) require additional ``"`` quotes around the option string.
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``'--vf=lavfi="gradfun=20:30,vflip"'``
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Same as before, but uses quoting that should be safe with all
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shells. The outer ``'`` quotes make sure that the shell does not
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remove the ``"`` quotes needed by mpv.
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``'--vf=lavfi=graph="gradfun=radius=30:strength=20,vflip"'``
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Same as before, but uses named parameters for everything.
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``<sws-flags>``
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If libavfilter inserts filters for pixel format conversion, this
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option gives the flags which should be passed to libswscale. This
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option is numeric and takes a bit-wise combination of ``SWS_`` flags.
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See ``https://git.videolan.org/?p=ffmpeg.git;a=blob;f=libswscale/swscale.h``.
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``<o>``
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Set AVFilterGraph options. These should be documented by FFmpeg.
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.. admonition:: Example
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``'--vf=lavfi=yadif:o="threads=2,thread_type=slice"'``
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forces a specific threading configuration.
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``sub=[=bottom-margin:top-margin]``
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Moves subtitle rendering to an arbitrary point in the filter chain, or force
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subtitle rendering in the video filter as opposed to using video output OSD
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support.
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``<bottom-margin>``
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Adds a black band at the bottom of the frame. The SSA/ASS renderer can
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place subtitles there (with ``--sub-use-margins``).
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``<top-margin>``
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Black band on the top for toptitles (with ``--sub-use-margins``).
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.. admonition:: Examples
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``--vf=sub,eq``
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Moves sub rendering before the eq filter. This will put both
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subtitle colors and video under the influence of the video equalizer
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settings.
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``vapoursynth=file:buffered-frames:concurrent-frames``
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Loads a VapourSynth filter script. This is intended for streamed
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processing: mpv actually provides a source filter, instead of using a
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native VapourSynth video source. The mpv source will answer frame
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requests only within a small window of frames (the size of this window
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is controlled with the ``buffered-frames`` parameter), and requests outside
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of that will return errors. As such, you can't use the full power of
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VapourSynth, but you can use certain filters.
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.. warning::
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Do not use this filter, unless you have expert knowledge in VapourSynth,
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and know how to fix bugs in the mpv VapourSynth wrapper code.
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If you just want to play video generated by VapourSynth (i.e. using
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a native VapourSynth video source), it's better to use ``vspipe`` and a
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pipe or FIFO to feed the video to mpv. The same applies if the filter script
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requires random frame access (see ``buffered-frames`` parameter).
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``file``
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Filename of the script source. Currently, this is always a python
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script (``.vpy`` in VapourSynth convention).
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The variable ``video_in`` is set to the mpv video source, and it is
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expected that the script reads video from it. (Otherwise, mpv will
|
|
decode no video, and the video packet queue will overflow, eventually
|
|
leading to only audio playing, or worse.)
|
|
|
|
The filter graph created by the script is also expected to pass through
|
|
timestamps using the ``_DurationNum`` and ``_DurationDen`` frame
|
|
properties.
|
|
|
|
See the end of the option list for a full list of script variables
|
|
defined by mpv.
|
|
|
|
.. admonition:: Example:
|
|
|
|
::
|
|
|
|
import vapoursynth as vs
|
|
from vapoursynth import core
|
|
core.std.AddBorders(video_in, 10, 10, 20, 20).set_output()
|
|
|
|
.. warning::
|
|
|
|
The script will be reloaded on every seek. This is done to reset
|
|
the filter properly on discontinuities.
|
|
|
|
``buffered-frames``
|
|
Maximum number of decoded video frames that should be buffered before
|
|
the filter (default: 4). This specifies the maximum number of frames
|
|
the script can request in backward direction.
|
|
|
|
E.g. if ``buffered-frames=5``, and the script just requested frame 15,
|
|
it can still request frame 10, but frame 9 is not available anymore.
|
|
If it requests frame 30, mpv will decode 15 more frames, and keep only
|
|
frames 25-30.
|
|
|
|
The only reason why this buffer exists is to serve the random access
|
|
requests the VapourSynth filter can make.
|
|
|
|
The VapourSynth API has a ``getFrameAsync`` function, which takes an
|
|
absolute frame number. Source filters must respond to all requests. For
|
|
example, a source filter can request frame 2432, and then frame 3.
|
|
Source filters typically implement this by pre-indexing the entire
|
|
file.
|
|
|
|
mpv on the other hand is stream oriented, and does not allow filters to
|
|
seek. (And it would not make sense to allow it, because it would ruin
|
|
performance.) Filters get frames sequentially in playback direction, and
|
|
cannot request them out of order.
|
|
|
|
To compensate for this mismatch, mpv allows the filter to access frames
|
|
within a certain window. ``buffered-frames`` controls the size of this
|
|
window. Most VapourSynth filters happen to work with this, because mpv
|
|
requests frames sequentially increasing from it, and most filters only
|
|
require frames "close" to the requested frame.
|
|
|
|
If the filter requests a frame that has a higher frame number than the
|
|
highest buffered frame, new frames will be decoded until the requested
|
|
frame number is reached. Excessive frames will be flushed out in a FIFO
|
|
manner (there are only at most ``buffered-frames`` in this buffer).
|
|
|
|
If the filter requests a frame that has a lower frame number than the
|
|
lowest buffered frame, the request cannot be satisfied, and an error
|
|
is returned to the filter. This kind of error is not supposed to happen
|
|
in a "proper" VapourSynth environment. What exactly happens depends on
|
|
the filters involved.
|
|
|
|
Increasing this buffer will not improve performance. Rather, it will
|
|
waste memory, and slow down seeks (when enough frames to fill the buffer
|
|
need to be decoded at once). It is only needed to prevent the error
|
|
described in the previous paragraph.
|
|
|
|
How many frames a filter requires depends on filter implementation
|
|
details, and mpv has no way of knowing. A scale filter might need only
|
|
1 frame, an interpolation filter may require a small number of frames,
|
|
and the ``Reverse`` filter will require an infinite number of frames.
|
|
|
|
If you want reliable operation to the full extend VapourSynth is
|
|
capable, use ``vspipe``.
|
|
|
|
The actual number of buffered frames also depends on the value of the
|
|
``concurrent-frames`` option. Currently, both option values are
|
|
multiplied to get the final buffer size.
|
|
|
|
``concurrent-frames``
|
|
Number of frames that should be requested in parallel. The
|
|
level of concurrency depends on the filter and how quickly mpv can
|
|
decode video to feed the filter. This value should probably be
|
|
proportional to the number of cores on your machine. Most time,
|
|
making it higher than the number of cores can actually make it
|
|
slower.
|
|
|
|
Technically, mpv will call the VapourSynth ``getFrameAsync`` function
|
|
in a loop, until there are ``concurrent-frames`` frames that have not
|
|
been returned by the filter yet. This also assumes that the rest of the
|
|
mpv filter chain reads the output of the ``vapoursynth`` filter quickly
|
|
enough. (For example, if you pause the player, filtering will stop very
|
|
soon, because the filtered frames are waiting in a queue.)
|
|
|
|
Actual concurrency depends on many other factors.
|
|
|
|
By default, this uses the special value ``auto``, which sets the option
|
|
to the number of detected logical CPU cores.
|
|
|
|
The following ``.vpy`` script variables are defined by mpv:
|
|
|
|
``video_in``
|
|
The mpv video source as vapoursynth clip. Note that this has an
|
|
incorrect (very high) length set, which confuses many filters. This is
|
|
necessary, because the true number of frames is unknown. You can use the
|
|
``Trim`` filter on the clip to reduce the length.
|
|
|
|
``video_in_dw``, ``video_in_dh``
|
|
Display size of the video. Can be different from video size if the
|
|
video does not use square pixels (e.g. DVD).
|
|
|
|
``container_fps``
|
|
FPS value as reported by file headers. This value can be wrong or
|
|
completely broken (e.g. 0 or NaN). Even if the value is correct,
|
|
if another filter changes the real FPS (by dropping or inserting
|
|
frames), the value of this variable will not be useful. Note that
|
|
the ``--fps`` command line option overrides this value.
|
|
|
|
Useful for some filters which insist on having a FPS.
|
|
|
|
``display_fps``
|
|
Refresh rate of the current display. Note that this value can be 0.
|
|
|
|
``vavpp``
|
|
VA-API video post processing. Requires the system to support VA-API,
|
|
i.e. Linux/BSD only. Works with ``--vo=vaapi`` and ``--vo=gpu`` only.
|
|
Currently deinterlaces. This filter is automatically inserted if
|
|
deinterlacing is requested (either using the ``d`` key, by default mapped to
|
|
the command ``cycle deinterlace``, or the ``--deinterlace`` option).
|
|
|
|
``deint=<method>``
|
|
Select the deinterlacing algorithm.
|
|
|
|
no
|
|
Don't perform deinterlacing.
|
|
auto
|
|
Select the best quality deinterlacing algorithm (default). This
|
|
goes by the order of the options as documented, with
|
|
``motion-compensated`` being considered best quality.
|
|
first-field
|
|
Show only first field.
|
|
bob
|
|
bob deinterlacing.
|
|
weave, motion-adaptive, motion-compensated
|
|
Advanced deinterlacing algorithms. Whether these actually work
|
|
depends on the GPU hardware, the GPU drivers, driver bugs, and
|
|
mpv bugs.
|
|
|
|
``<interlaced-only>``
|
|
:no: Deinterlace all frames (default).
|
|
:yes: Only deinterlace frames marked as interlaced.
|
|
|
|
``reversal-bug=<yes|no>``
|
|
:no: Use the API as it was interpreted by older Mesa drivers. While
|
|
this interpretation was more obvious and intuitive, it was
|
|
apparently wrong, and not shared by Intel driver developers.
|
|
:yes: Use Intel interpretation of surface forward and backwards
|
|
references (default). This is what Intel drivers and newer Mesa
|
|
drivers expect. Matters only for the advanced deinterlacing
|
|
algorithms.
|
|
|
|
``vdpaupp``
|
|
VDPAU video post processing. Works with ``--vo=vdpau`` and ``--vo=gpu``
|
|
only. This filter is automatically inserted if deinterlacing is requested
|
|
(either using the ``d`` key, by default mapped to the command
|
|
``cycle deinterlace``, or the ``--deinterlace`` option). When enabling
|
|
deinterlacing, it is always preferred over software deinterlacer filters
|
|
if the ``vdpau`` VO is used, and also if ``gpu`` is used and hardware
|
|
decoding was activated at least once (i.e. vdpau was loaded).
|
|
|
|
``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=<yes|no>``
|
|
Whether deinterlacing is enabled (default: no). If enabled, it will use
|
|
the mode selected with ``deint-mode``.
|
|
``deint-mode=<first-field|bob|temporal|temporal-spatial>``
|
|
Select deinterlacing mode (default: temporal).
|
|
|
|
Note that there's currently a mechanism that allows the ``vdpau`` VO to
|
|
change the ``deint-mode`` of auto-inserted ``vdpaupp`` filters. To avoid
|
|
confusion, it's recommended not to use the ``--vo=vdpau`` suboptions
|
|
related to filtering.
|
|
|
|
first-field
|
|
Show only first field.
|
|
bob
|
|
Bob deinterlacing.
|
|
temporal
|
|
Motion-adaptive temporal deinterlacing. May lead to A/V desync
|
|
with slow video hardware and/or high resolution.
|
|
temporal-spatial
|
|
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.
|
|
``interlaced-only=<yes|no>``
|
|
If ``yes``, only deinterlace frames marked as interlaced (default: no).
|
|
``hqscaling=<0-9>``
|
|
0
|
|
Use default VDPAU scaling (default).
|
|
1-9
|
|
Apply high quality VDPAU scaling (needs capable hardware).
|
|
|
|
``d3d11vpp``
|
|
Direct3D 11 video post processing. Currently requires D3D11 hardware
|
|
decoding for use.
|
|
|
|
``deint=<yes|no>``
|
|
Whether deinterlacing is enabled (default: no).
|
|
``interlaced-only=<yes|no>``
|
|
If ``yes``, only deinterlace frames marked as interlaced (default: no).
|
|
``mode=<blend|bob|adaptive|mocomp|ivctc|none>``
|
|
Tries to select a video processor with the given processing capability.
|
|
If a video processor supports multiple capabilities, it is not clear
|
|
which algorithm is actually selected. ``none`` always falls back. On
|
|
most if not all hardware, this option will probably do nothing, because
|
|
a video processor usually supports all modes or none.
|
|
|
|
``fingerprint=...``
|
|
Compute video frame fingerprints and provide them as metadata. Actually, it
|
|
currently barely deserved to be called ``fingerprint``, because it does not
|
|
compute "proper" fingerprints, only tiny downscaled images (but which can be
|
|
used to compute image hashes or for similarity matching).
|
|
|
|
The main purpose of this filter is to support the ``skip-logo.lua`` script.
|
|
If this script is dropped, or mpv ever gains a way to load user-defined
|
|
filters (other than VapourSynth), this filter will be removed. Due to the
|
|
"special" nature of this filter, it will be removed without warning.
|
|
|
|
The intended way to read from the filter is using ``vf-metadata`` (also
|
|
see ``clear-on-query`` filter parameter). The property will return a list
|
|
of key/value pairs as follows:
|
|
|
|
::
|
|
|
|
fp0.pts = 1.2345
|
|
fp0.hex = 1234abcdef...bcde
|
|
fp1.pts = 1.4567
|
|
fp1.hex = abcdef1234...6789
|
|
...
|
|
fpN.pts = ...
|
|
fpN.hex = ...
|
|
type = gray-hex-16x16
|
|
|
|
Each ``fp<N>`` entry is for a frame. The ``pts`` entry specifies the
|
|
timestamp of the frame (within the filter chain; in simple cases this is
|
|
the same as the display timestamp). The ``hex`` field is the hex encoded
|
|
fingerprint, whose size and meaning depend on the ``type`` filter option.
|
|
The ``type`` field has the same value as the option the filter was created
|
|
with.
|
|
|
|
This returns the frames that were filtered since the last query of the
|
|
property. If ``clear-on-query=no`` was set, a query doesn't reset the list
|
|
of frames. In both cases, a maximum of 10 frames is returned. If there are
|
|
more frames, the oldest frames are discarded. Frames are returned in filter
|
|
order.
|
|
|
|
(This doesn't return a structured list for the per-frame details because the
|
|
internals of the ``vf-metadata`` mechanism suck. The returned format may
|
|
change in the future.)
|
|
|
|
This filter uses zimg for speed and profit. However, it will fallback to
|
|
libswscale in a number of situations: lesser pixel formats, unaligned data
|
|
pointers or strides, or if zimg fails to initialize for unknown reasons. In
|
|
these cases, the filter will use more CPU. Also, it will output different
|
|
fingerprints, because libswscale cannot perform the full range expansion we
|
|
normally request from zimg. As a consequence, the filter may be slower and
|
|
not work correctly in random situations.
|
|
|
|
``type=...``
|
|
What fingerprint to compute. Available types are:
|
|
|
|
:gray-hex-8x8: grayscale, 8 bit, 8x8 size
|
|
:gray-hex-16x16: grayscale, 8 bit, 16x16 size (default)
|
|
|
|
Both types simply remove all colors, downscale the image, concatenate
|
|
all pixel values to a byte array, and convert the array to a hex string.
|
|
|
|
``clear-on-query=yes|no``
|
|
Clear the list of frame fingerprints if the ``vf-metadata`` property for
|
|
this filter is queried (default: yes). This requires some care by the
|
|
user. Some types of accesses might query the filter multiple times,
|
|
which leads to lost frames.
|
|
|
|
``print=yes|no``
|
|
Print computed fingerprints to the terminal (default: no). This is
|
|
mostly for testing and such. Scripts should use ``vf-metadata`` to
|
|
read information from this filter instead.
|
|
|
|
``gpu=...``
|
|
Convert video to RGB using the OpenGL renderer normally used with
|
|
``--vo=gpu``. This requires that the EGL implementation supports off-screen
|
|
rendering on the default display. (This is the case with Mesa.)
|
|
|
|
Sub-options:
|
|
|
|
``w=<pixels>``, ``h=<pixels>``
|
|
Size of the output in pixels (default: 0). If not positive, this will
|
|
use the size of the first filtered input frame.
|
|
|
|
.. warning::
|
|
|
|
This is highly experimental. Performance is bad, and it will not work
|
|
everywhere in the first place. Some features are not supported.
|
|
|
|
.. warning::
|
|
|
|
This does not do OSD rendering. If you see OSD, then it has been
|
|
rendered by the VO backend. (Subtitles are rendered by the ``gpu``
|
|
filter, if possible.)
|
|
|
|
.. warning::
|
|
|
|
If you use this with encoding mode, keep in mind that encoding mode will
|
|
convert the RGB filter's output back to yuv420p in software, using the
|
|
configured software scaler. Using ``zimg`` might improve this, but in
|
|
any case it might go against your goals when using this filter.
|
|
|
|
.. warning::
|
|
|
|
Do not use this with ``--vo=gpu``. It will apply filtering twice, since
|
|
most ``--vo=gpu`` options are unconditionally applied to the ``gpu``
|
|
filter. There is no mechanism in mpv to prevent this.
|
|
|