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978 lines
39 KiB
ReStructuredText
VIDEO FILTERS
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=============
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Video filters allow you to modify the video stream and its properties. The
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syntax is:
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``--vf=<filter1[=parameter1:parameter2:...],filter2,...>``
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Setup a chain of video filters.
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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.
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``--vf-defaults=<filter1[=parameter1:parameter2:...],filter2,...>``
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Set defaults for each filter.
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.. note::
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To get a full list of available video filters, see ``--vf=help``.
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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-add=<filter1[,filter2,...]>``
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Appends the filters given as arguments to the filter list.
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``--vf-pre=<filter1[,filter2,...]>``
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Prepends the filters given as arguments to the filter list.
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``--vf-del=<index1[,index2,...]>``
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Deletes the filters at the given indexes. Index numbers start at 0,
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negative numbers address the end of the list (-1 is the last).
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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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``--vf=<filter=named_parameter1=value1[:named_parameter2=value2:...]>``
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Sets a named parameter to the given value. Use on and off or yes and no to
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set flag parameters.
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Available filters are:
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``crop[=w:h:x:y]``
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Crops the given part of the image and discards the rest. Useful to remove
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black bands from widescreen videos.
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``<w>,<h>``
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Cropped width and height, defaults to original width and height.
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``<x>,<y>``
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Position of the cropped picture, defaults to center.
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``expand[=w:h:x:y:aspect:round]``
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Expands (not scales) video resolution to the given value and places the
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unscaled original at coordinates x, y.
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``<w>,<h>``
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Expanded width,height (default: original width,height). Negative
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values for w and h are treated as offsets to the original size.
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.. admonition:: Example
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``expand=0:-50:0:0``
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Adds a 50 pixel border to the bottom of the picture.
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``<x>,<y>``
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position of original image on the expanded image (default: center)
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``<aspect>``
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Expands to fit an aspect instead of a resolution (default: 0).
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.. admonition:: Example
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``expand=800::::4/3``
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Expands to 800x600, unless the source is higher resolution, in
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which case it expands to fill a 4/3 aspect.
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``<round>``
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Rounds up to make both width and height divisible by <r> (default: 1).
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``flip``
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Flips the image upside down.
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``mirror``
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Mirrors the image on the Y axis.
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``rotate[=0|90|180|270]``
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Rotates the image by a multiple of 90 degrees clock-wise.
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``scale[=w:h:param:param2:chr-drop:noup:arnd``
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Scales the image with the software scaler (slow) and performs a YUV<->RGB
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color space conversion (see also ``--sws``).
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All parameters are optional.
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``<w>,<h>``
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scaled width/height (default: original width/height)
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:0: scaled d_width/d_height
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:-1: original width/height
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:-2: Calculate w/h using the other dimension and the prescaled
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aspect ratio.
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:-3: Calculate w/h using the other dimension and the original
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aspect ratio.
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:-(n+8): Like -n above, but rounding the dimension to the closest
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multiple of 16.
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``<param>[:<param2>]`` (see also ``--sws``)
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Set some scaling parameters depending on the type of scaler selected
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with ``--sws``::
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--sws=2 (bicubic): B (blurring) and C (ringing)
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0.00:0.60 default
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0.00:0.75 VirtualDub's "precise bicubic"
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0.00:0.50 Catmull-Rom spline
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0.33:0.33 Mitchell-Netravali spline
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1.00:0.00 cubic B-spline
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--sws=7 (Gaussian): sharpness (0 (soft) - 100 (sharp))
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--sws=9 (Lanczos): filter length (1-10)
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``<chr-drop>``
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chroma skipping
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:0: Use all available input lines for chroma (default).
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:1: Use only every 2. input line for chroma.
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:2: Use only every 4. input line for chroma.
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:3: Use only every 8. input line for chroma.
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``<noup>``
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Disallow upscaling past the original dimensions.
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:0: Allow upscaling (default).
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:1: Disallow upscaling if one dimension exceeds its original value.
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:2: Disallow upscaling if both dimensions exceed their original values.
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``<arnd>``
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Accurate rounding for the vertical scaler, which may be faster or
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slower than the default rounding.
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:0: Disable accurate rounding (default).
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:1: Enable accurate rounding.
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``dsize[=w:h:aspect-method:r:aspect]``
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Changes the intended display size/aspect at an arbitrary point in the
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filter chain. Aspect can be given as a fraction (4/3) or floating point
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number (1.33). Alternatively, you may specify the exact display width and
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height desired. Note that this filter does *not* do any scaling itself; it
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just affects what later scalers (software or hardware) will do when
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auto-scaling to correct aspect.
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``<w>,<h>``
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New display width and height.
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Can also be these special values:
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:0: original display width and height
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:-1: original video width and height (default)
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:-2: Calculate w/h using the other dimension and the original display
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aspect ratio.
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:-3: Calculate w/h using the other dimension and the original video
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aspect ratio.
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.. admonition:: Example
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``dsize=800:-2``
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Specifies a display resolution of 800x600 for a 4/3 aspect
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video, or 800x450 for a 16/9 aspect video.
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``<aspect-method>``
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Modifies width and height according to original aspect ratios.
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:-1: Ignore original aspect ratio (default).
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:0: Keep display aspect ratio by using ``<w>`` and ``<h>`` as maximum
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resolution.
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:1: Keep display aspect ratio by using ``<w>`` and ``<h>`` as minimum
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resolution.
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:2: Keep video aspect ratio by using ``<w>`` and ``<h>`` as maximum
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resolution.
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:3: Keep video aspect ratio by using ``<w>`` and ``<h>`` as minimum
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resolution.
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.. admonition:: Example
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``dsize=800:600:0``
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Specifies a display resolution of at most 800x600, or smaller,
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in order to keep aspect.
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``<r>``
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Rounds up to make both width and height divisible by ``<r>``
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(default: 1).
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``<aspect>``
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Force an aspect ratio.
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``format[=fmt[:outfmt]]``
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Restricts the color space for the next filter without doing any conversion.
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Use together with the scale filter for a real conversion.
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.. note::
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For a list of available formats, see ``format=fmt=help``.
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``<fmt>``
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Format name, e.g. rgb15, bgr24, 420p, etc. (default: yuyv).
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``<outfmt>``
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Format name that should be substituted for the output. If this is not
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100% compatible with the ``<fmt>`` value, it will crash.
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.. admonition:: Examples
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====================== =====================
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Valid Invalid (will crash)
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====================== =====================
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``format=rgb24:bgr24`` ``format=rgb24:420p``
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``format=yuyv:uyvy``
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====================== =====================
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``noformat[=fmt]``
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Restricts the color space for the next filter without doing any conversion.
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Unlike the format filter, this will allow any color space except the one
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you specify.
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.. note:: For a list of available formats, see ``noformat=fmt=help``.
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``<fmt>``
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Format name, e.g. rgb15, bgr24, 420p, etc. (default: 420p).
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``pp[=[filter1[:option1[:option2...]]/[-]filter2...]]``
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Enables the specified chain of post-processing subfilters. Subfilters must
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be separated by '/' and can be disabled by prepending a '-'. Each
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subfilter and some options have a short and a long name that can be used
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interchangeably, i.e. ``dr``/``dering`` are the same. All subfilters share
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common options to determine their scope:
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``a/autoq``
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Automatically switch the subfilter off if the CPU is too slow.
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``c/chrom``
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Do chrominance filtering, too (default).
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``y/nochrom``
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Do luminance filtering only (no chrominance).
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``n/noluma``
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Do chrominance filtering only (no luminance).
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.. note::
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``--vf=pp:help`` shows a list of available subfilters.
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.. note::
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Unlike in MPlayer or in earlier versions, you must quote the pp string
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if it contains ``:`` characters, e.g. ``'--vf=pp=[...]'``.
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Available subfilters are:
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``hb/hdeblock[:difference[:flatness]]``
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horizontal deblocking filter
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:<difference>: Difference factor where higher values mean more
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deblocking (default: 32).
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:<flatness>: Flatness threshold where lower values mean more
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deblocking (default: 39).
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``vb/vdeblock[:difference[:flatness]]``
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vertical deblocking filter
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:<difference>: Difference factor where higher values mean more
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deblocking (default: 32).
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:<flatness>: Flatness threshold where lower values mean more
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deblocking (default: 39).
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``ha/hadeblock[:difference[:flatness]]``
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accurate horizontal deblocking filter
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:<difference>: Difference factor where higher values mean more
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deblocking (default: 32).
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:<flatness>: Flatness threshold where lower values mean more
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deblocking (default: 39).
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``va/vadeblock[:difference[:flatness]]``
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accurate vertical deblocking filter
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:<difference>: Difference factor where higher values mean more
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deblocking (default: 32).
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:<flatness>: Flatness threshold where lower values mean more
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deblocking (default: 39).
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The horizontal and vertical deblocking filters share the difference and
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flatness values so you cannot set different horizontal and vertical
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thresholds.
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``h1/x1hdeblock``
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experimental horizontal deblocking filter
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``v1/x1vdeblock``
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experimental vertical deblocking filter
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``dr/dering``
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deringing filter
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``tn/tmpnoise[:threshold1[:threshold2[:threshold3]]]``
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temporal noise reducer
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:<threshold1>: larger -> stronger filtering
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:<threshold2>: larger -> stronger filtering
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:<threshold3>: larger -> stronger filtering
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``al/autolevels[:f/fullyrange]``
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automatic brightness / contrast correction
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:f/fullyrange: Stretch luminance to (0-255).
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``lb/linblenddeint``
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Linear blend deinterlacing filter that deinterlaces the given block by
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filtering all lines with a (1 2 1) filter.
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``li/linipoldeint``
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Linear interpolating deinterlacing filter that deinterlaces the given
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block by linearly interpolating every second line.
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``ci/cubicipoldeint``
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Cubic interpolating deinterlacing filter deinterlaces the given block
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by cubically interpolating every second line.
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``md/mediandeint``
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Median deinterlacing filter that deinterlaces the given block by
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applying a median filter to every second line.
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``fd/ffmpegdeint``
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FFmpeg deinterlacing filter that deinterlaces the given block by
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filtering every second line with a (-1 4 2 4 -1) filter.
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``l5/lowpass5``
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Vertically applied FIR low-pass deinterlacing filter that deinterlaces
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the given block by filtering all lines with a (-1 2 6 2 -1) filter.
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``fq/forceQuant[:quantizer]``
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Overrides the quantizer table from the input with the constant
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quantizer you specify.
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:<quantizer>: quantizer to use
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``de/default``
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default pp filter combination (hb:a,vb:a,dr:a)
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``fa/fast``
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fast pp filter combination (h1:a,v1:a,dr:a)
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``ac``
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high quality pp filter combination (ha:a:128:7,va:a,dr:a)
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.. note::
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This filter is only available if FFmpeg/Libav has been compiled
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with libpostproc enabled.
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.. admonition:: Examples
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``--vf=pp=hb/vb/dr/al``
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horizontal and vertical deblocking, deringing and automatic
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brightness/contrast
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``--vf=pp=de/-al``
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default filters without brightness/contrast correction
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``--vf=pp=[default/tmpnoise:1:2:3]``
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Enable default filters & temporal denoiser.
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``--vf=pp=[hb:y/vb:a]``
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Horizontal deblocking on luminance only, and switch vertical
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deblocking on or off automatically depending on available CPU time.
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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.
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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 ``http://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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``noise[=<strength>[:averaged][:pattern][:temporal][:uniform][:hq]``
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Adds noise.
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``strength``
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Set the noise for all components. If you want different strength
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values for luma and chroma, use libavfilter's noise filter directly
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(using ``--vf=lavfi=[noise=...]``), or tell the libavfilter developers
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to stop being stupid.
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``averaged``
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averaged temporal noise (smoother, but a lot slower)
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``pattern``
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mix random noise with a (semi)regular pattern
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``temporal``
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temporal noise (noise pattern changes between frames)
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``uniform``
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uniform noise (Gaussian otherwise)
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``hq``
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high quality (slightly better looking, slightly slower) - not available
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when using libavfilter
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``hqdn3d[=luma_spatial:chroma_spatial:luma_tmp:chroma_tmp]``
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This filter aims to reduce image noise producing smooth images and making
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still images really still (This should enhance compressibility.).
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``<luma_spatial>``
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spatial luma strength (default: 4)
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``<chroma_spatial>``
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spatial chroma strength (default: 3)
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``<luma_tmp>``
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luma temporal strength (default: 6)
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``<chroma_tmp>``
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chroma temporal strength (default:
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``luma_tmp*chroma_spatial/luma_spatial``)
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``eq[=gamma:contrast:brightness:saturation:rg:gg:bg:weight]``
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Software equalizer that uses lookup tables (slow), allowing gamma correction
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in addition to simple brightness and contrast adjustment. The parameters are
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given as floating point values.
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``<0.1-10>``
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initial gamma value (default: 1.0)
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``<-2-2>``
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initial contrast, where negative values result in a negative image
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(default: 1.0)
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``<-1-1>``
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initial brightness (default: 0.0)
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``<0-3>``
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initial saturation (default: 1.0)
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``<0.1-10>``
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gamma value for the red component (default: 1.0)
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``<0.1-10>``
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gamma value for the green component (default: 1.0)
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``<0.1-10>``
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gamma value for the blue component (default: 1.0)
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``<0-1>``
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The weight parameter can be used to reduce the effect of a high gamma
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value on bright image areas, e.g. keep them from getting overamplified
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and just plain white. A value of 0.0 turns the gamma correction all
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the way down while 1.0 leaves it at its full strength (default: 1.0).
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``ilpack[=mode]``
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When interlaced video is stored in YUV 4:2:0 formats, chroma interlacing
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does not line up properly due to vertical downsampling of the chroma
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channels. This filter packs the planar 4:2:0 data into YUY2 (4:2:2) format
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with the chroma lines in their proper locations, so that in any given
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scanline, the luma and chroma data both come from the same field.
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``<mode>``
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Select the sampling mode.
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:0: nearest-neighbor sampling, fast but incorrect
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:1: linear interpolation (default)
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``unsharp[=lx:ly:la:cx:cy:ca]``
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unsharp mask / Gaussian blur
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``l`` is for the luma component, ``c`` for the chroma component. ``x``/``y``
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is the filter size. ``a`` is the amount.
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``lx``, ``ly``, ``cx``, ``cy``
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width and height of the matrix, odd sized in both directions (min =
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3:3, max = 13:11 or 11:13, usually something between 3:3 and 7:7)
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``la``, ``ca``
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Relative amount of sharpness/blur to add to the image (a sane range
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should be -1.5-1.5).
|
|
|
|
:<0: blur
|
|
:>0: sharpen
|
|
|
|
``swapuv``
|
|
Swap U & V plane.
|
|
|
|
``pullup[=jl:jr:jt:jb:sb:mp]``
|
|
Pulldown reversal (inverse telecine) filter, capable of handling mixed
|
|
hard-telecine, 24000/1001 fps progressive, and 30000/1001 fps progressive
|
|
content. The ``pullup`` filter makes use of future context in making its
|
|
decisions. It is stateless in the sense that it does not lock onto a pattern
|
|
to follow, but it instead looks forward to the following fields in order to
|
|
identify matches and rebuild progressive frames.
|
|
|
|
``jl``, ``jr``, ``jt``, and ``jb``
|
|
These options set the amount of "junk" to ignore at the left, right,
|
|
top, and bottom of the image, respectively. Left/right are in units of
|
|
8 pixels, while top/bottom are in units of 2 lines. The default is 8
|
|
pixels on each side.
|
|
|
|
``sb`` (strict breaks)
|
|
Setting this option to 1 will reduce the chances of ``pullup``
|
|
generating an occasional mismatched frame, but it may also cause an
|
|
excessive number of frames to be dropped during high motion sequences.
|
|
Conversely, setting it to -1 will make ``pullup`` match fields more
|
|
easily. This may help processing of video where there is slight
|
|
blurring between the fields, but may also cause there to be interlaced
|
|
frames in the output.
|
|
|
|
``mp`` (metric plane)
|
|
This option may be set to ``u`` or ``v`` to use a chroma plane instead of the
|
|
luma plane for doing ``pullup``'s computations. This may improve accuracy
|
|
on very clean source material, but more likely will decrease accuracy,
|
|
especially if there is chroma noise (rainbow effect) or any grayscale
|
|
video. The main purpose of setting ``mp`` to a chroma plane is to reduce
|
|
CPU load and make pullup usable in realtime on slow machines.
|
|
|
|
``divtc[=options]``
|
|
Inverse telecine for deinterlaced video. If 3:2-pulldown telecined video
|
|
has lost one of the fields or is deinterlaced using a method that keeps
|
|
one field and interpolates the other, the result is a juddering video that
|
|
has every fourth frame duplicated. This filter is intended to find and
|
|
drop those duplicates and restore the original film framerate. Two
|
|
different modes are available: One-pass mode is the default and is
|
|
straightforward to use, but has the disadvantage that any changes in the
|
|
telecine phase (lost frames or bad edits) cause momentary judder until the
|
|
filter can resync again. Two-pass mode avoids this by analyzing the entire
|
|
video beforehand so it will have forward knowledge about the phase changes
|
|
and can resync at the exact spot. These passes do *not* correspond to pass
|
|
one and two of the encoding process. You must run an extra pass using
|
|
``divtc`` pass one before the actual encoding throwing the resulting video
|
|
away. Then use ``divtc`` pass two for the actual encoding. If you use
|
|
multiple encoder passes, use ``divtc`` pass two for all of them.
|
|
|
|
The options are:
|
|
|
|
``pass=1|2``
|
|
Use two pass mode.
|
|
|
|
``file=<filename>``
|
|
Set the two pass log filename (default: ``framediff.log``).
|
|
|
|
``threshold=<value>``
|
|
Set the minimum strength the telecine pattern must have for the filter
|
|
to believe in it (default: 0.5). This is used to avoid recognizing
|
|
false pattern from the parts of the video that are very dark or very
|
|
still.
|
|
|
|
``window=<numframes>``
|
|
Set the number of past frames to look at when searching for pattern
|
|
(default: 30). Longer window improves the reliability of the pattern
|
|
search, but shorter window improves the reaction time to the changes
|
|
in the telecine phase. This only affects the one-pass mode. The
|
|
two-pass mode currently uses fixed window that extends to both future
|
|
and past.
|
|
|
|
``phase=0|1|2|3|4``
|
|
Sets the initial telecine phase for one pass mode (default: 0). The
|
|
two-pass mode can see the future, so it is able to use the correct
|
|
phase from the beginning, but one-pass mode can only guess. It catches
|
|
the correct phase when it finds it, but this option can be used to fix
|
|
the possible juddering at the beginning. The first pass of the two
|
|
pass mode also uses this, so if you save the output from the first
|
|
pass, you get constant phase result.
|
|
|
|
``deghost=<value>``
|
|
Set the deghosting threshold (0-255 for one-pass mode, -255-255 for
|
|
two-pass mode, default 0). If nonzero, deghosting mode is used. This
|
|
is for video that has been deinterlaced by blending the fields
|
|
together instead of dropping one of the fields. Deghosting amplifies
|
|
any compression artifacts in the blended frames, so the parameter
|
|
value is used as a threshold to exclude those pixels from deghosting
|
|
that differ from the previous frame less than specified value. If two
|
|
pass mode is used, then negative value can be used to make the filter
|
|
analyze the whole video in the beginning of pass-2 to determine
|
|
whether it needs deghosting or not and then select either zero or the
|
|
absolute value of the parameter. Specify this option for pass 2, it
|
|
makes no difference on pass 1.
|
|
|
|
``phase[=t|b|p|a|u|T|B|A|U][:v]``
|
|
Delay interlaced video by one field time so that the field order changes.
|
|
The intended use is to fix PAL videos that have been captured with the
|
|
opposite field order to the film-to-video transfer. The options are:
|
|
|
|
``t``
|
|
Capture field order top-first, transfer bottom-first. Filter will
|
|
delay the bottom field.
|
|
|
|
``b``
|
|
Capture bottom-first, transfer top-first. Filter will delay the top
|
|
field.
|
|
|
|
``p``
|
|
Capture and transfer with the same field order. This mode only exists
|
|
for the documentation of the other options to refer to, but if you
|
|
actually select it, the filter will faithfully do nothing ;-)
|
|
|
|
``a``
|
|
Capture field order determined automatically by field flags, transfer
|
|
opposite. Filter selects among ``t`` and ``b`` modes on a frame by frame
|
|
basis using field flags. If no field information is available, then this
|
|
works just like ``u``.
|
|
|
|
``u``
|
|
Capture unknown or varying, transfer opposite. Filter selects among
|
|
``t`` and ``b`` on a frame by frame basis by analyzing the images and
|
|
selecting the alternative that produces best match between the fields.
|
|
|
|
``T``
|
|
Capture top-first, transfer unknown or varying. Filter selects among
|
|
``t`` and ``p`` using image analysis.
|
|
|
|
``B``
|
|
Capture bottom-first, transfer unknown or varying. Filter selects
|
|
among ``b`` and ``p`` using image analysis.
|
|
|
|
``A``
|
|
Capture determined by field flags, transfer unknown or varying. Filter
|
|
selects among ``t``, ``b`` and ``p`` using field flags and image
|
|
analysis. If no field information is available, then this works just
|
|
like ``U``. This is the default mode.
|
|
|
|
``U``
|
|
Both capture and transfer unknown or varying. Filter selects among
|
|
``t``, ``b`` and ``p`` using image analysis only.
|
|
|
|
``v``
|
|
Verbose operation. Prints the selected mode for each frame and the
|
|
average squared difference between fields for ``t``, ``b``, and ``p``
|
|
alternatives. (Ignored when libavfilter is used.)
|
|
|
|
``yadif=[mode[:enabled=yes|no]]``
|
|
Yet another deinterlacing filter
|
|
|
|
``<mode>``
|
|
:frame: Output 1 frame for each frame.
|
|
:field: Output 1 frame for each field.
|
|
:frame-nospatial: Like ``frame`` but skips spatial interlacing check.
|
|
:field-nospatial: Like ``field`` but skips spatial interlacing check.
|
|
|
|
``<enabled>``
|
|
:yes: Filter is active (default).
|
|
:no: Filter is not active, but can be activated with the ``D`` key
|
|
(or any other key that toggles the ``deinterlace`` property).
|
|
|
|
This filter, is automatically inserted when using the ``D`` key (or any
|
|
other key that toggles the ``deinterlace`` property or when using the
|
|
``--deinterlace`` switch), assuming the video output does not have native
|
|
deinterlacing support.
|
|
|
|
If you just want to set the default mode, put this filter and its options
|
|
into ``--vf-defaults`` instead, and enable deinterlacing with ``D`` or
|
|
``--deinterlace``.
|
|
|
|
Also note that the ``D`` key is stupid enough to insert an interlacer twice
|
|
when inserting yadif with ``--vf``, so using the above methods is
|
|
recommended.
|
|
|
|
``delogo[=x:y:w:h:t:show]``
|
|
Suppresses a TV station logo by a simple interpolation of the surrounding
|
|
pixels. Just set a rectangle covering the logo and watch it disappear (and
|
|
sometimes something even uglier appear - your mileage may vary).
|
|
|
|
``<x>,<y>``
|
|
top left corner of the logo
|
|
``<w>,<h>``
|
|
width and height of the cleared rectangle
|
|
``<t>``
|
|
Thickness of the fuzzy edge of the rectangle (added to ``w`` and
|
|
``h``). When set to -1, a green rectangle is drawn on the screen to
|
|
simplify finding the right ``x``,``y``,``w``,``h`` parameters.
|
|
``show``
|
|
Draw a rectangle showing the area defined by x/y/w/h.
|
|
|
|
``screenshot``
|
|
Optional filter for screenshot support. This is only needed if the video
|
|
output does not provide working direct screenshot support. Note that it is
|
|
not always safe to insert this filter by default. See `TAKING SCREENSHOTS`_
|
|
for details.
|
|
|
|
``sub=[=bottom-margin:top-margin]``
|
|
Moves subtitle rendering to an arbitrary point in the filter chain, or force
|
|
subtitle rendering in the video filter as opposed to using video output OSD
|
|
support.
|
|
|
|
``<bottom-margin>``
|
|
Adds a black band at the bottom of the frame. The SSA/ASS renderer can
|
|
place subtitles there (with ``--ass-use-margins``).
|
|
``<top-margin>``
|
|
Black band on the top for toptitles (with ``--ass-use-margins``).
|
|
|
|
.. admonition:: Examples
|
|
|
|
``--vf=sub,eq``
|
|
Moves sub rendering before the eq filter. This will put both
|
|
subtitle colors and video under the influence of the video equalizer
|
|
settings.
|
|
|
|
``stereo3d[=in:out]``
|
|
Stereo3d converts between different stereoscopic image formats.
|
|
|
|
``<in>``
|
|
Stereoscopic image format of input. Possible values:
|
|
|
|
``sbsl`` or ``side_by_side_left_first``
|
|
side by side parallel (left eye left, right eye right)
|
|
``sbsr`` or ``side_by_side_right_first``
|
|
side by side crosseye (right eye left, left eye right)
|
|
``abl`` or ``above_below_left_first``
|
|
above-below (left eye above, right eye below)
|
|
``abr`` or ``above_below_right_first``
|
|
above-below (right eye above, left eye below)
|
|
``ab2l`` or ``above_below_half_height_left_first``
|
|
above-below with half height resolution (left eye above, right eye
|
|
below)
|
|
``ab2r`` or ``above_below_half_height_right_first``
|
|
above-below with half height resolution (right eye above, left eye
|
|
below)
|
|
|
|
``<out>``
|
|
Stereoscopic image format of output. Possible values are all the input
|
|
formats as well as:
|
|
|
|
``arcg`` or ``anaglyph_red_cyan_gray``
|
|
anaglyph red/cyan gray (red filter on left eye, cyan filter on
|
|
right eye)
|
|
``arch`` or ``anaglyph_red_cyan_half_color``
|
|
anaglyph red/cyan half colored (red filter on left eye, cyan filter
|
|
on right eye)
|
|
``arcc`` or ``anaglyph_red_cyan_color``
|
|
anaglyph red/cyan color (red filter on left eye, cyan filter on
|
|
right eye)
|
|
``arcd`` or ``anaglyph_red_cyan_dubois``
|
|
anaglyph red/cyan color optimized with the least-squares
|
|
projection of Dubois (red filter on left eye, cyan filter on right
|
|
eye)
|
|
``agmg`` or ``anaglyph_green_magenta_gray``
|
|
anaglyph green/magenta gray (green filter on left eye, magenta
|
|
filter on right eye)
|
|
``agmh`` or ``anaglyph_green_magenta_half_color``
|
|
anaglyph green/magenta half colored (green filter on left eye,
|
|
magenta filter on right eye)
|
|
``agmc`` or ``anaglyph_green_magenta_color``
|
|
anaglyph green/magenta colored (green filter on left eye, magenta
|
|
filter on right eye)
|
|
``aybg`` or ``anaglyph_yellow_blue_gray``
|
|
anaglyph yellow/blue gray (yellow filter on left eye, blue filter
|
|
on right eye)
|
|
``aybh`` or ``anaglyph_yellow_blue_half_color``
|
|
anaglyph yellow/blue half colored (yellow filter on left eye, blue
|
|
filter on right eye)
|
|
``aybc`` or ``anaglyph_yellow_blue_color``
|
|
anaglyph yellow/blue colored (yellow filter on left eye, blue
|
|
filter on right eye)
|
|
``irl`` or ``interleave_rows_left_first``
|
|
Interleaved rows (left eye has top row, right eye starts on next
|
|
row)
|
|
``irr`` or ``interleave_rows_right_first``
|
|
Interleaved rows (right eye has top row, left eye starts on next
|
|
row)
|
|
``ml`` or ``mono_left``
|
|
mono output (left eye only)
|
|
``mr`` or ``mono_right``
|
|
mono output (right eye only)
|
|
|
|
``gradfun[=strength[:radius|:size=<size>]]``
|
|
Fix the banding artifacts that are sometimes introduced into nearly flat
|
|
regions by truncation to 8-bit color depth. Interpolates the gradients that
|
|
should go where the bands are, and dithers them.
|
|
|
|
``<strength>``
|
|
Maximum amount by which the filter will change any one pixel. Also the
|
|
threshold for detecting nearly flat regions (default: 1.5).
|
|
|
|
``<radius>``
|
|
Neighborhood to fit the gradient to. Larger radius makes for smoother
|
|
gradients, but also prevents the filter from modifying pixels near
|
|
detailed regions (default: disabled).
|
|
|
|
``<size>``
|
|
size of the filter in percent of the image diagonal size. This is
|
|
used to calculate the final radius size (default: 1).
|
|
|
|
|
|
``dlopen=dll[:a0[:a1[:a2[:a3]]]]``
|
|
Loads an external library to filter the image. The library interface
|
|
is the ``vf_dlopen`` interface specified using ``libmpcodecs/vf_dlopen.h``.
|
|
|
|
``dll=<library>``
|
|
Specify the library to load. This may require a full file system path
|
|
in some cases. This argument is required.
|
|
|
|
``a0=<string>``
|
|
Specify the first parameter to pass to the library.
|
|
|
|
``a1=<string>``
|
|
Specify the second parameter to pass to the library.
|
|
|
|
``a2=<string>``
|
|
Specify the third parameter to pass to the library.
|
|
|
|
``a3=<string>``
|
|
Specify the fourth parameter to pass to the library.
|
|
|
|
``vapoursynth=file:buffered-frames:concurrent-frames``
|
|
Loads a VapourSynth filter script. This is intended for streamed
|
|
processing: mpv actually provides a source filter, instead of using a
|
|
native VapourSynth video source. The mpv source will answer frame
|
|
requests only within a small window of frames (the size of this window
|
|
is controlled with the ``buffered-frames`` parameter), and requests outside
|
|
of that will return errors. As such, you can't use the full power of
|
|
VapourSynth, but you can use certain filters.
|
|
|
|
If you just want to play video generated by a VapourSynth (i.e. using
|
|
a native VapourSynth video source), it's better to use ``vspipe`` and a
|
|
FIFO to feed the video to mpv. The same applies if the filter script
|
|
requires random frame access (see ``buffered-frames`` parameter).
|
|
|
|
This filter is experimental. If it turns out that it works well and is
|
|
used, it will be ported to libavfilter. Otherwise, it will be just removed.
|
|
|
|
``file``
|
|
Filename of the script source. Currently, this is always a python
|
|
script. The variable ``video_in`` is set to the mpv video source,
|
|
and it is expected that the script reads video from it. (Otherwise,
|
|
mpv will decode no video, and the video packet queue will overflow,
|
|
eventually leading to audio being stopped.) The script is also
|
|
expected to pass through timestamps using the ``_DurationNum`` and
|
|
``_DurationDen`` frame properties.
|
|
|
|
.. admonition:: Example:
|
|
|
|
::
|
|
|
|
import vapoursynth as vs
|
|
core = vs.get_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 requests backwards. 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 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.
|
|
|
|
(Normally, VapourSynth source filters must provide random access, but
|
|
mpv was made for playback, and does not provide frame-exact random
|
|
access. The way this video filter works is a compromise to make simple
|
|
filters work anyway.)
|
|
|
|
``concurrent-frames``
|
|
Number of frames that should be requested in parallel (default: 2). 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.
|
|
|
|
``vavpp``
|
|
VA-AP-API video post processing. Works with ``--vo=vaapi`` and ``--vo=opengl``
|
|
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.
|
|
first-field
|
|
Show only first field (going by ``--field-dominance``).
|
|
bob
|
|
bob deinterlacing (default).
|
|
|
|
``vdpaupp``
|
|
VDPAU video post processing. Works with ``--vo=vdpau`` and ``--vo=opengl``
|
|
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 ``opengl`` 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).
|
|
All modes respect ``--field-dominance``.
|
|
|
|
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.
|
|
``hqscaling=<0-9>``
|
|
0
|
|
Use default VDPAU scaling (default).
|
|
1-9
|
|
Apply high quality VDPAU scaling (needs capable hardware).
|
|
|
|
``buffer=<num>``
|
|
Buffer ``<num>`` frames in the filter chain. This filter is probably pretty
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useless, except for debugging. (Note that this won't help smoothing out
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latencies with decoding, because the filter will never output a frame if
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the buffer isn't full, except on EOF.)
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