@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
@item width_type
Set method to specify band-width of filter.
@table @option
-@item @var{h} (Hz)
-@item @var{q} (Q-Factor)
-@item @var{o} (octave)
-@item @var{s} (slope)
+@item h
+Hz
+@item q
+Q-Factor
+@item o
+octave
+@item s
+slope
@end table
@item width, w
If set this option is used instead of @var{nb_samples} one.
@item curve
-Set cuve for fade transition.
+Set curve for fade transition.
+
+It accepts the following values:
@table @option
-@item @var{tri} (triangular, linear slope (default))
-@item @var{qsin} (quarter of sine wave)
-@item @var{hsin} (half of sine wave)
-@item @var{esin} (exponential sine wave)
-@item @var{log} (logarithmic)
-@item @var{par} (inverted parabola)
-@item @var{qua} (quadratic)
-@item @var{cub} (cubic)
-@item @var{squ} (square root)
-@item @var{cbr} (cubic root)
+@item tri
+select triangular, linear slope (default)
+@item qsin
+select quarter of sine wave
+@item hsin
+select half of sine wave
+@item esin
+select exponential sine wave
+@item log
+select logarithmic
+@item par
+select inverted parabola
+@item qua
+select quadratic
+@item cub
+select cubic
+@item squ
+select square root
+@item cbr
+select cubic root
@end table
@end table
@code{strong}. It defaults to @code{none}.
@end table
+@section histogram
+
+Compute and draw a color distribution histogram for the input video.
+
+The computed histogram is a representation of distribution of color components
+in an image.
+
+The filter accepts the following named parameters:
+
+@table @option
+@item mode
+Set histogram mode.
+
+It accepts the following values:
+@table @samp
+@item levels
+standard histogram that display color components distribution in an image.
+Displays color graph for each color component. Shows distribution
+of the Y, U, V, A or G, B, R components, depending on input format,
+in current frame. Bellow each graph is color component scale meter.
+
+@item color
+chroma values in vectorscope, if brighter more such chroma values are
+distributed in an image.
+Displays chroma values (U/V color placement) in two dimensional graph
+(which is called a vectorscope). It can be used to read of the hue and
+saturation of the current frame. At a same time it is a histogram.
+The whiter a pixel in the vectorscope, the more pixels of the input frame
+correspond to that pixel (that is the more pixels have this chroma value).
+The V component is displayed on the horizontal (X) axis, with the leftmost
+side being V = 0 and the rightmost side being V = 255.
+The U component is displayed on the vertical (Y) axis, with the top
+representing U = 0 and the bottom representing U = 255.
+
+The position of a white pixel in the graph corresponds to the chroma value
+of a pixel of the input clip. So the graph can be used to read of the
+hue (color flavor) and the saturation (the dominance of the hue in the color).
+As the hue of a color changes, it moves around the square. At the center of
+the square, the saturation is zero, which means that the corresponding pixel
+has no color. If you increase the amount of a specific color, while leaving
+the other colors unchanged, the saturation increases, and you move towards
+the edge of the square.
+
+@item color2
+chroma values in vectorscope, similar as @code{color} but actual chroma values
+are displayed.
+
+@item waveform
+per row/column color component graph. In row mode graph in the left side represents
+color component value 0 and right side represents value = 255. In column mode top
+side represents color component value = 0 and bottom side represents value = 255.
+@end table
+Default value is @code{levels}.
+
+@item level_height
+Set height of level in @code{levels}. Default value is @code{200}.
+Allowed range is [50, 2048].
+
+@item scale_height
+Set height of color scale in @code{levels}. Default value is @code{12}.
+Allowed range is [0, 40].
+
+@item step
+Set step for @code{waveform} mode. Smaller values are useful to find out how much
+of same luminance values across input rows/columns are distributed.
+Default value is @code{10}. Allowed range is [1, 255].
+
+@item waveform_mode
+Set mode for @code{waveform}. Can be either @code{row}, or @code{column}.
+Default is @code{row}.
+
+@item display_mode
+Set display mode for @code{waveform}.
+It accepts the following values:
+@table @samp
+@item parade
+Display separate waveforms for the color components side by side in
+@code{row} mode or one below other in @code{column} mode.
+
+In this display mode it is easy to spot color casts in the highlights and
+shadows of an image, by comparing the contours of the top and the bottom
+of each waveform. Since whites, grays, and blacks are characterized by
+exactly equal amounts of red, green, and blue, neutral areas of the
+picture should display three waveforms of roughly equal height.
+If not, the correction is easy to make by making adjustments to level the
+three waveforms.
+
+@item overlay
+Presents information that's identical to that in the @code{parade}, except
+that the waveforms representing color components are superimposed directly
+over one another.
+
+This display mode can make it easier to spot the relative differences or
+similarities in overlapping areas of the color components that are supposed
+to be identical, such as neutral whites, grays, or blacks.
+@end table
+Default is @code{parade}.
+@end table
+
+@subsection Examples
+
+@itemize
+
+@item
+Calculate and draw histogram:
+@example
+ffplay -i input -vf histogram
+@end example
+
+@end itemize
+
@section hqdn3d
High precision/quality 3d denoise filter. This filter aims to reduce
@section idet
-Interlaceing detect filter. This filter tries to detect if the input is
-interlaced or progressive. Top or bottom field first.
+Detect video interlacing type.
+
+This filter tries to detect if the input is interlaced or progressive,
+top or bottom field first.
+
+@section il
+
+Deinterleave or interleave fields.
+
+This filter allows to process interlaced images fields without
+deinterlacing them. Deinterleaving splits the input frame into 2
+fields (so called half pictures). Odd lines are moved to the top
+half of the output image, even lines to the bottom half.
+You can process (filter) them independently and then re-interleave them.
+
+It accepts a list of options in the form of @var{key}=@var{value} pairs
+separated by ":". A description of the accepted options follows.
+
+@table @option
+@item luma_mode, l
+@item chroma_mode, s
+@item alpha_mode, a
+Available values for @var{luma_mode}, @var{chroma_mode} and
+@var{alpha_mode} are:
+
+@table @samp
+@item none
+Do nothing.
+
+@item deinterleave, d
+Deinterleave fields, placing one above the other.
+
+@item interleave, i
+Interleave fields. Reverse the effect of deinterleaving.
+@end table
+Default value is @code{none}.
+
+@item luma_swap, ls
+@item chroma_swap, cs
+@item alpha_swap, as
+Swap luma/chroma/alpha fields. Exchange even & odd lines. Default value is @code{0}.
+@end table
@section kerndeint
All expressions default to "val".
-Some examples follow:
+@subsection Examples
+
+@itemize
+@item
+Negate input video:
@example
-# negate input video
lutrgb="r=maxval+minval-val:g=maxval+minval-val:b=maxval+minval-val"
lutyuv="y=maxval+minval-val:u=maxval+minval-val:v=maxval+minval-val"
+@end example
-# the above is the same as
+The above is the same as:
+@example
lutrgb="r=negval:g=negval:b=negval"
lutyuv="y=negval:u=negval:v=negval"
+@end example
-# negate luminance
+@item
+Negate luminance:
+@example
lutyuv=y=negval
+@end example
-# remove chroma components, turns the video into a graytone image
+@item
+Remove chroma components, turns the video into a graytone image:
+@example
lutyuv="u=128:v=128"
+@end example
-# apply a luma burning effect
+@item
+Apply a luma burning effect:
+@example
lutyuv="y=2*val"
+@end example
-# remove green and blue components
+@item
+Remove green and blue components:
+@example
lutrgb="g=0:b=0"
+@end example
-# set a constant alpha channel value on input
+@item
+Set a constant alpha channel value on input:
+@example
format=rgba,lutrgb=a="maxval-minval/2"
+@end example
-# correct luminance gamma by a 0.5 factor
+@item
+Correct luminance gamma by a 0.5 factor:
+@example
lutyuv=y=gammaval(0.5)
@end example
+@end itemize
@section mp
@item dint
@item divtc
@item down3dright
-@item dsize
@item eq2
@item eq
@item fil
@item fspp
@item harddup
-@item il
@item ilpack
@item ivtc
@item kerndeint
@item mcdeint
-@item noise
@item ow
@item perspective
@item phase
@item qp
@item sab
@item softpulldown
-@item softskip
@item spp
@item telecine
@item tinterlace
@example
mp=eq2=1.0:2:0.5
@end example
-
-@item
-Add temporal noise to input video:
-@example
-mp=noise=20t
-@end example
@end itemize
See also mplayer(1), @url{http://www.mplayerhq.hu/}.
noformat=yuv420p:yuv444p:yuv410p
@end example
+@section noise
+
+Add noise on video input frame.
+
+This filter accepts a list of options in the form of @var{key}=@var{value}
+pairs separated by ":". A description of the accepted options follows.
+
+@table @option
+@item all_seed
+@item c0_seed
+@item c1_seed
+@item c2_seed
+@item c3_seed
+Set noise seed for specific pixel component or all pixel components in case
+of @var{all_seed}. Default value is @code{123457}.
+
+@item all_strength, as
+@item c0_strength, c0s
+@item c1_strength, c1s
+@item c2_strength, c2s
+@item c3_strength, c3s
+Set noise strength for specific pixel component or all pixel components in case
+@var{all_strength}. Default value is @code{0}. Allowed range is [0, 100].
+
+@item all_flags, af
+@item c0_flags, c0f
+@item c1_flags, c1f
+@item c2_flags, c2f
+@item c3_flags, c3f
+Set pixel component flags or set flags for all components if @var{all_flags}.
+Available values for component flags are:
+@table @samp
+@item a
+averaged temporal noise (smoother)
+@item p
+mix random noise with a (semi)regular pattern
+@item q
+higher quality (slightly better looking, slightly slower)
+@item t
+temporal noise (noise pattern changes between frames)
+@item u
+uniform noise (gaussian otherwise)
+@end table
+@end table
+
+Some examples follow:
+@example
+Add temporal and uniform noise to input video:
+noise=alls=20:allf=t+u
+@end example
+
@section null
Pass the video source unchanged to the output.
@section pad
-Add paddings to the input image, and places the original input at the
+Add paddings to the input image, and place the original input at the
given coordinates @var{x}, @var{y}.
-It accepts the following parameters:
+The filter accepts parameters as a list of @var{key}=@var{value} pairs,
+separated by ":".
+
+If the key of the first options is omitted, the arguments are
+interpreted according to the syntax
@var{width}:@var{height}:@var{x}:@var{y}:@var{color}.
-The parameters @var{width}, @var{height}, @var{x}, and @var{y} are
-expressions containing the following constants:
+A description of the accepted options follows.
+
+@table @option
+@item width, w
+@item height, h
+Specify an expression for the size of the output image with the
+paddings added. If the value for @var{width} or @var{height} is 0, the
+corresponding input size is used for the output.
+
+The @var{width} expression can reference the value set by the
+@var{height} expression, and vice versa.
+
+The default value of @var{width} and @var{height} is 0.
+
+@item x
+@item y
+Specify an expression for the offsets where to place the input image
+in the padded area with respect to the top/left border of the output
+image.
+
+The @var{x} expression can reference the value set by the @var{y}
+expression, and vice versa.
+
+The default value of @var{x} and @var{y} is 0.
+
+@item color
+Specify the color of the padded area, it can be the name of a color
+(case insensitive match) or a 0xRRGGBB[AA] sequence.
+
+The default value of @var{color} is "black".
+@end table
+
+The value for the @var{width}, @var{height}, @var{x}, and @var{y}
+options are expressions containing the following constants:
@table @option
@item in_w, in_h
pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.
@end table
-Follows the description of the accepted parameters.
-
-@table @option
-@item width, height
-
-Specify the size of the output image with the paddings added. If the
-value for @var{width} or @var{height} is 0, the corresponding input size
-is used for the output.
-
-The @var{width} expression can reference the value set by the
-@var{height} expression, and vice versa.
-
-The default value of @var{width} and @var{height} is 0.
-
-@item x, y
-
-Specify the offsets where to place the input image in the padded area
-with respect to the top/left border of the output image.
-
-The @var{x} expression can reference the value set by the @var{y}
-expression, and vice versa.
-
-The default value of @var{x} and @var{y} is 0.
-
-@item color
-
-Specify the color of the padded area, it can be the name of a color
-(case insensitive match) or a 0xRRGGBB[AA] sequence.
-
-The default value of @var{color} is "black".
-
-@end table
-
@subsection Examples
@itemize
pad=640:480:0:40:violet
@end example
+The example above is equivalent to the following command:
+@example
+pad=width=640:height=480:x=0:y=40:color=violet
+@end example
+
@item
Pad the input to get an output with dimensions increased by 3/2,
and put the input video at the center of the padded area:
@var{layout}[:@var{nb_frames}[:@var{margin}[:@var{padding}]]]
-For example, produce 8×8 PNG tiles of all keyframes (@option{-skip_frame
+For example, produce 8x8 PNG tiles of all keyframes (@option{-skip_frame
nokey}) in a movie:
@example
ffmpeg -skip_frame nokey -i file.avi -vf 'scale=128:72,tile=8x8' -an -vsync 0 keyframes%03d.png
Sharpen or blur the input video.
-It accepts the following parameters:
+This filter accepts parameters as a list of @var{key}=@var{value} pairs,
+separated by ":".
+
+If the key of the first options is omitted, the arguments are
+interpreted according to the syntax:
@var{luma_msize_x}:@var{luma_msize_y}:@var{luma_amount}:@var{chroma_msize_x}:@var{chroma_msize_y}:@var{chroma_amount}
-Negative values for the amount will blur the input video, while positive
-values will sharpen. All parameters are optional and default to the
-equivalent of the string '5:5:1.0:5:5:0.0'.
+A description of the accepted options follows.
@table @option
-
-@item luma_msize_x
-Set the luma matrix horizontal size. It can be an integer between 3
-and 13, default value is 5.
-
-@item luma_msize_y
-Set the luma matrix vertical size. It can be an integer between 3
-and 13, default value is 5.
-
-@item luma_amount
-Set the luma effect strength. It can be a float number between -2.0
-and 5.0, default value is 1.0.
-
-@item chroma_msize_x
-Set the chroma matrix horizontal size. It can be an integer between 3
-and 13, default value is 5.
-
-@item chroma_msize_y
-Set the chroma matrix vertical size. It can be an integer between 3
-and 13, default value is 5.
-
-@item chroma_amount
-Set the chroma effect strength. It can be a float number between -2.0
-and 5.0, default value is 0.0.
-
+@item luma_msize_x, lx
+@item chroma_msize_x, cx
+Set the luma/chroma matrix horizontal size. It can be an integer
+between 3 and 63, default value is 5.
+
+@item luma_msize_y, ly
+@item chroma_msize_y, cy
+Set the luma/chroma matrix vertical size. It can be an integer between
+3 and 63, default value is 5.
+
+@item luma_amount, la
+@item chroma_amount, ca
+Set the luma/chroma effect strength. It can be a float number,
+reasonable values lay between -1.5 and 1.5.
+
+Negative values will blur the input video, while positive values will
+sharpen it, a value of zero will disable the effect.
+
+Default value is 1.0 for @option{luma_amount}, 0.0 for
+@option{chroma_amount}.
@end table
+Some examples follow:
+@itemize
+@item
+Apply strong luma sharpen effect:
@example
-# Strong luma sharpen effect parameters
unsharp=7:7:2.5
+@end example
-# Strong blur of both luma and chroma parameters
+@item
+Apply strong blur of both luma and chroma parameters:
+@example
unsharp=7:7:-2:7:7:-2
-
-# Use the default values with @command{ffmpeg}
-ffmpeg -i in.avi -vf "unsharp" out.mp4
@end example
+@end itemize
@section vflip
The filter has @var{v}+@var{a} outputs: first @var{v} video outputs, then
@var{a} audio outputs.
-There are @var{n}×(@var{v}+@var{a}) inputs: first the inputs for the first
+There are @var{n}x(@var{v}+@var{a}) inputs: first the inputs for the first
segment, in the same order as the outputs, then the inputs for the second
segment, etc.
The filter accepts the following named parameters:
@table @option
@item size, s
-Specify the video size for the output. Default value is @code{640x480}.
+Specify the video size for the output. Default value is @code{640x512}.
+
@item slide
Specify if the spectrum should slide along the window. Default value is
@code{0}.
+
+@item mode
+Specify display mode.
+
+It accepts the following values:
+@table @samp
+@item combined
+all channels are displayed in the same row
+@item separate
+all channels are displayed in separate rows
+@end table
+
+Default value is @samp{combined}.
+
+@item color
+Specify display color mode.
+
+It accepts the following values:
+@table @samp
+@item channel
+each channel is displayed in a separate color
+@item intensity
+each channel is is displayed using the same color scheme
+@end table
+
+Default value is @samp{channel}.
+
+@item scale
+Specify scale used for calculating intensity color values.
+
+It accepts the following values:
+@table @samp
+@item lin
+linear
+@item sqrt
+square root, default
+@item cbrt
+cubic root
+@item log
+logarithmic
+@end table
+
+Default value is @samp{sqrt}.
+
+@item saturation
+Set saturation modifier for displayed colors. Negative values provide
+alternative color scheme. @code{0} is no saturation at all.
+Saturation must be in [-10.0, 10.0] range.
+Default value is @code{1}.
@end table
The usage is very similar to the showwaves filter; see the examples in that
projects / ffmpeg / blobdiff