Set split frequencies. Those must be positive and increasing.
@item order
-Set filter order, can be @var{2nd}, @var{4th} or @var{8th}.
+Set filter order for each band split. This controls filter roll-off or steepness
+of filter transfer function.
+Available values are:
+
+@table @samp
+@item 2nd
+12 dB per octave.
+@item 4th
+24 dB per octave.
+@item 6th
+36 dB per octave.
+@item 8th
+48 dB per octave.
+@item 10th
+60 dB per octave.
+@item 12th
+72 dB per octave.
+@item 14th
+84 dB per octave.
+@item 16th
+96 dB per octave.
+@item 18th
+108 dB per octave.
+@item 20th
+120 dB per octave.
+@end table
+
Default is @var{4th}.
+
+@item level
+Set input gain level. Allowed range is from 0 to 1. Default value is 1.
+
+@item gains
+Set output gain for each band. Default value is 1 for all bands.
@end table
+@subsection Examples
+
+@itemize
+@item
+Split input audio stream into two bands (low and high) with split frequency of 1500 Hz,
+each band will be in separate stream:
+@example
+ffmpeg -i in.flac -filter_complex 'acrossover=split=1500[LOW][HIGH]' -map '[LOW]' low.wav -map '[HIGH]' high.wav
+@end example
+
+@item
+Same as above, but with higher filter order:
+@example
+ffmpeg -i in.flac -filter_complex 'acrossover=split=1500:order=8th[LOW][HIGH]' -map '[LOW]' low.wav -map '[HIGH]' high.wav
+@end example
+
+@item
+Same as above, but also with additional middle band (frequencies between 1500 and 8000):
+@example
+ffmpeg -i in.flac -filter_complex 'acrossover=split=1500 8000:order=8th[LOW][MID][HIGH]' -map '[LOW]' low.wav -map '[MID]' mid.wav -map '[HIGH]' high.wav
+@end example
+@end itemize
+
@section acrusher
Reduce audio bit resolution.
Set LFO rate.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section acue
Delay audio filtering until a given wallclock timestamp. See the @ref{cue}
@end example
@end itemize
+@section adenorm
+Remedy denormals in audio by adding extremely low-level noise.
+
+This filter shall be placed before any filter that can produce denormals.
+
+A description of the accepted parameters follows.
+
+@table @option
+@item level
+Set level of added noise in dB. Default is @code{-351}.
+Allowed range is from -451 to -90.
+
+@item type
+Set type of added noise.
+
+@table @option
+@item dc
+Add DC signal.
+@item ac
+Add AC signal.
+@item square
+Add square signal.
+@item pulse
+Add pulse signal.
+@end table
+
+Default is @code{dc}.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section aderivative, aintegral
Compute derivative/integral of audio stream.
@end table
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section aeval
Modify an audio signal according to the specified expressions.
select double-exponential sigmoid
@item losi
select logistic sigmoid
+@item sinc
+select sine cardinal function
+@item isinc
+select inverted sine cardinal function
@item nofade
no fade applied
@end table
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@subsection Examples
@itemize
aformat=sample_fmts=u8|s16:channel_layouts=stereo
@end example
+@section afreqshift
+Apply frequency shift to input audio samples.
+
+The filter accepts the following options:
+
+@table @option
+@item shift
+Specify frequency shift. Allowed range is -INT_MAX to INT_MAX.
+Default value is 0.0.
+
+@item level
+Set output gain applied to final output. Allowed range is from 0.0 to 1.0.
+Default value is 1.0.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section agate
A gate is mainly used to reduce lower parts of a signal. This kind of signal
Default is @code{average}. Can be @code{average} or @code{maximum}.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section aiir
Apply an arbitrary Infinite Impulse Response filter.
@table @option
@item zeros, z
-Set numerator/zeros coefficients.
+Set B/numerator/zeros/reflection coefficients.
@item poles, p
-Set denominator/poles coefficients.
+Set A/denominator/poles/ladder coefficients.
@item gains, k
Set channels gains.
Set coefficients format.
@table @samp
+@item ll
+lattice-ladder function
+@item sf
+analog transfer function
@item tf
digital transfer function
@item zp
@end table
@item process, r
-Set kind of processing.
-Can be @code{d} - direct or @code{s} - serial cascading. Default is @code{s}.
+Set type of processing.
+
+@table @samp
+@item d
+direct processing
+@item s
+serial processing
+@item p
+parallel processing
+@end table
@item precision, e
Set filtering precision.
Set video stream size. This option is used only when @var{response} is enabled.
@end table
-Coefficients in @code{tf} format are separated by spaces and are in ascending
+Coefficients in @code{tf} and @code{sf} format are separated by spaces and are in ascending
order.
Coefficients in @code{zp} format are separated by spaces and order of coefficients
@example
aiir=k=0.79575848078096756:z=0.80918701+0.58773007i 0.80918701-0.58773007i 0.80884700+0.58784055i 0.80884700-0.58784055i:p=0.63892345+0.59951235i 0.63892345-0.59951235i 0.79582691+0.44198673i 0.79582691-0.44198673i:f=zp:r=s
@end example
+
+@item
+Apply 3-rd order analog normalized Butterworth low-pass filter, using analog transfer function format:
+@example
+aiir=z=1.3057 0 0 0:p=1.3057 2.3892 2.1860 1:f=sf:r=d
+@end example
@end itemize
@section alimiter
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item weights
Specify weight of each input audio stream as sequence.
Each weight is separated by space. By default all inputs have same weight.
+
+@item sum
+Do not scale inputs but instead do only summation of samples.
+Beware of heavy clipping if inputs are not normalized prior of filtering
+or output from @var{amix} normalized after filtering. By default is disabled.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item weights
+@item sum
Syntax is same as option with same name.
@end table
If input doesn't have that frequency the entry is ignored.
@item w
-Set band width in hertz.
+Set band width in Hertz.
@item g
Set band gain in dB.
@var{fN} is existing filter number, starting from 0, if no such filter is available
error is returned.
@var{freq} set new frequency parameter.
-@var{width} set new width parameter in herz.
+@var{width} set new width parameter in Hertz.
@var{gain} set new gain parameter in dB.
Full filter invocation with asendcmd may look like this:
@subsection Commands
-This filter supports the following commands:
-@table @option
-@item s
-Change denoise strength. Argument is single float number.
-Syntax for the command is : "@var{s}"
-
-@item o
-Change output mode.
-Syntax for the command is : "i", "o" or "n" string.
-@end table
+This filter supports the all above options as @ref{commands}.
@section anlms
Apply Normalized Least-Mean-Squares algorithm to the first audio stream using the second audio stream.
@end table
@end table
+@section aphaseshift
+Apply phase shift to input audio samples.
+
+The filter accepts the following options:
+
+@table @option
+@item shift
+Specify phase shift. Allowed range is from -1.0 to 1.0.
+Default value is 0.0.
+
+@item level
+Set output gain applied to final output. Allowed range is from 0.0 to 1.0.
+Default value is 1.0.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section apulsator
Audio pulsator is something between an autopanner and a tremolo.
@table @option
@item model, m
Set train model file to load. This option is always required.
+
+@item mix
+Set how much to mix filtered samples into final output.
+Allowed range is from -1 to 1. Default value is 1.
+Negative values are special, they set how much to keep filtered noise
+in the final filter output. Set this option to -1 to hear actual
+noise removed from input signal.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section asetnsamples
Set the number of samples per each output audio frame.
It accepts the following values:
@table @option
+@item hard
@item tanh
@item atan
@item cubic
@item alg
@item quintic
@item sin
+@item erf
@end table
+@item threshold
+Set threshold from where to start clipping. Default value is 0dB or 1.
+
+@item output
+Set gain applied to output. Default value is 0dB or 1.
+
@item param
Set additional parameter which controls sigmoid function.
+
+@item oversample
+Set oversampling factor.
@end table
@subsection Commands
@table @option
@item dry
Set dry gain, how much of original signal is kept. Allowed range is from 0 to 1.
-Default value is 0.5.
+Default value is 0.7.
@item wet
Set wet gain, how much of filtered signal is kept. Allowed range is from 0 to 1.
-Default value is 0.8.
+Default value is 0.7.
@item decay
Set delay line decay gain value. Allowed range is from 0 to 1.
@item feedback
Set delay line feedback gain value. Allowed range is from 0 to 1.
-Default value is 0.5.
+Default value is 0.9.
@item cutoff
-Set cutoff frequency in herz. Allowed range is 50 to 900.
+Set cutoff frequency in Hertz. Allowed range is 50 to 900.
Default value is 100.
@item slope
This filter supports the all above options as @ref{commands}.
+@section asubcut
+Cut subwoofer frequencies.
+
+This filter allows to set custom, steeper
+roll off than highpass filter, and thus is able to more attenuate
+frequency content in stop-band.
+
+The filter accepts the following options:
+
+@table @option
+@item cutoff
+Set cutoff frequency in Hertz. Allowed range is 2 to 200.
+Default value is 20.
+
+@item order
+Set filter order. Available values are from 3 to 20.
+Default value is 10.
+
+@item level
+Set input gain level. Allowed range is from 0 to 1. Default value is 1.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
+@section asupercut
+Cut super frequencies.
+
+The filter accepts the following options:
+
+@table @option
+@item cutoff
+Set cutoff frequency in Hertz. Allowed range is 20000 to 192000.
+Default value is 20000.
+
+@item order
+Set filter order. Available values are from 3 to 20.
+Default value is 10.
+
+@item level
+Set input gain level. Allowed range is from 0 to 1. Default value is 1.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
+@section asuperpass
+Apply high order Butterworth band-pass filter.
+
+The filter accepts the following options:
+
+@table @option
+@item centerf
+Set center frequency in Hertz. Allowed range is 2 to 999999.
+Default value is 1000.
+
+@item order
+Set filter order. Available values are from 4 to 20.
+Default value is 4.
+
+@item qfactor
+Set Q-factor. Allowed range is from 0.01 to 100. Default value is 1.
+
+@item level
+Set input gain level. Allowed range is from 0 to 2. Default value is 1.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
+@section asuperstop
+Apply high order Butterworth band-stop filter.
+
+The filter accepts the following options:
+
+@table @option
+@item centerf
+Set center frequency in Hertz. Allowed range is 2 to 999999.
+Default value is 1000.
+
+@item order
+Set filter order. Available values are from 4 to 20.
+Default value is 4.
+
+@item qfactor
+Set Q-factor. Allowed range is from 0.01 to 100. Default value is 1.
+
+@item level
+Set input gain level. Allowed range is from 0 to 2. Default value is 1.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section atempo
Adjust audio tempo.
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item width, w
Determine how steep is the filter's shelf transition.
+@item poles, p
+Set number of poles. Default is 2.
+
@item mix, m
How much to use filtered signal in output. Default is 1.
Range is between 0 and 1.
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
This filter supports the all above options as @ref{commands}.
@section crystalizer
-Simple algorithm to expand audio dynamic range.
+Simple algorithm for audio noise sharpening.
+
+This filter linearly increases differences betweeen each audio sample.
The filter accepts the following options:
@table @option
@item i
-Sets the intensity of effect (default: 2.0). Must be in range between 0.0
+Sets the intensity of effect (default: 2.0). Must be in range between -10.0 to 0
(unchanged sound) to 10.0 (maximum effect).
+To inverse filtering use negative value.
@item c
Enable clipping. By default is enabled.
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
Set sidechain gain. Default is 1. Range is from 0.015625 to 64.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section silencedetect
Detect silence in an audio stream.
@end example
@end itemize
+@section speechnorm
+Speech Normalizer.
+
+This filter expands or compresses each half-cycle of audio samples
+(local set of samples all above or all below zero and between two nearest zero crossings) depending
+on threshold value, so audio reaches target peak value under conditions controlled by below options.
+
+The filter accepts the following options:
+
+@table @option
+@item peak, p
+Set the expansion target peak value. This specifies the highest allowed absolute amplitude
+level for the normalized audio input. Default value is 0.95. Allowed range is from 0.0 to 1.0.
+
+@item expansion, e
+Set the maximum expansion factor. Allowed range is from 1.0 to 50.0. Default value is 2.0.
+This option controls maximum local half-cycle of samples expansion. The maximum expansion
+would be such that local peak value reaches target peak value but never to surpass it and that
+ratio between new and previous peak value does not surpass this option value.
+
+@item compression, c
+Set the maximum compression factor. Allowed range is from 1.0 to 50.0. Default value is 2.0.
+This option controls maximum local half-cycle of samples compression. This option is used
+only if @option{threshold} option is set to value greater than 0.0, then in such cases
+when local peak is lower or same as value set by @option{threshold} all samples belonging to
+that peak's half-cycle will be compressed by current compression factor.
+
+@item threshold, t
+Set the threshold value. Default value is 0.0. Allowed range is from 0.0 to 1.0.
+This option specifies which half-cycles of samples will be compressed and which will be expanded.
+Any half-cycle samples with their local peak value below or same as this option value will be
+compressed by current compression factor, otherwise, if greater than threshold value they will be
+expanded with expansion factor so that it could reach peak target value but never surpass it.
+
+@item raise, r
+Set the expansion raising amount per each half-cycle of samples. Default value is 0.001.
+Allowed range is from 0.0 to 1.0. This controls how fast expansion factor is raised per
+each new half-cycle until it reaches @option{expansion} value.
+Setting this options too high may lead to distortions.
+
+@item fall, f
+Set the compression raising amount per each half-cycle of samples. Default value is 0.001.
+Allowed range is from 0.0 to 1.0. This controls how fast compression factor is raised per
+each new half-cycle until it reaches @option{compression} value.
+
+@item channels, h
+Specify which channels to filter, by default all available channels are filtered.
+
+@item invert, i
+Enable inverted filtering, by default is disabled. This inverts interpretation of @option{threshold}
+option. When enabled any half-cycle of samples with their local peak value below or same as
+@option{threshold} option will be expanded otherwise it will be compressed.
+
+@item link, l
+Link channels when calculating gain applied to each filtered channel sample, by default is disabled.
+When disabled each filtered channel gain calculation is independent, otherwise when this option
+is enabled the minimum of all possible gains for each filtered channel is used.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section stereotools
This filter has some handy utilities to manage stereo signals, for converting
@item ms>rr
Mid/Side to Right/Right.
+
+@item ms>rl
+Mid/Side to Right/Left.
+
+@item lr>l-r
+Left/Right to Left - Right.
@end table
@item slev
@end table
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@subsection Examples
@itemize
@item width, w
Determine how steep is the filter's shelf transition.
+@item poles, p
+Set number of poles. Default is 2.
+
@item mix, m
How much to use filtered signal in output. Default is 1.
Range is between 0 and 1.
@item di
@item dii
@item tdii
+@item latt
+@end table
+
+@item precision, r
+Set precison of filtering.
+@table @option
+@item auto
+Pick automatic sample format depending on surround filters.
+@item s16
+Always use signed 16-bit.
+@item s32
+Always use signed 32-bit.
+@item f32
+Always use float 32-bit.
+@item f64
+Always use float 64-bit.
@end table
@end table
Parallel can be faster then serial, while other way around is never true.
Parallel will abort early on first change being greater then thresholds, while serial
-will continue processing other side of frames if they are equal or bellow thresholds.
+will continue processing other side of frames if they are equal or below thresholds.
+
+@item 0s
+@item 1s
+@item 2s
+Set sigma for 1st plane, 2nd plane or 3rd plane. Default is 32767.
+Valid range is from 0 to 32767.
+This options controls weight for each pixel in radius defined by size.
+Default value means every pixel have same weight.
+Setting this option to 0 effectively disables filtering.
@end table
@subsection Commands
Set the minimal luminance value. Default is @code{16}.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section bilateral
Apply bilateral filter, spatial smoothing while preserving edges.
Set planes to filter. Default is first only.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section bitplanenoise
Show and measure bit plane noise.
@end example
@end itemize
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
@section bm3d
Denoise frames using Block-Matching 3D algorithm.
planes except alpha plane.
@end table
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
@section chromahold
Remove all color information for all colors except for certain one.
@table @option
@item thres
Set threshold for averaging chrominance values.
-Sum of absolute difference of U and V pixel components or current
+Sum of absolute difference of Y, U and V pixel components of current
pixel and neighbour pixels lower than this threshold will be used in
averaging. Luma component is left unchanged and is copied to output.
Default value is 30. Allowed range is from 1 to 200.
Set vertical step when averaging. Default value is 1.
Allowed range is from 1 to 50.
Mostly useful to speed-up filtering.
+
+@item threy
+Set Y threshold for averaging chrominance values.
+Set finer control for max allowed difference between Y components
+of current pixel and neigbour pixels.
+Default value is 200. Allowed range is from 1 to 200.
+
+@item threu
+Set U threshold for averaging chrominance values.
+Set finer control for max allowed difference between U components
+of current pixel and neigbour pixels.
+Default value is 200. Allowed range is from 1 to 200.
+
+@item threv
+Set V threshold for averaging chrominance values.
+Set finer control for max allowed difference between V components
+of current pixel and neigbour pixels.
+Default value is 200. Allowed range is from 1 to 200.
@end table
@subsection Commands
This filter supports the all above options as @ref{commands}.
+@section colorcontrast
+
+Adjust color contrast between RGB components.
+
+The filter accepts the following options:
+
+@table @option
+@item rc
+Set the red-cyan contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
+
+@item gm
+Set the green-magenta contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
+
+@item by
+Set the blue-yellow contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
+
+@item rcw
+@item gmw
+@item byw
+Set the weight of each @code{rc}, @code{gm}, @code{by} option value. Default value is 0.0.
+Allowed range is from 0.0 to 1.0. If all weights are 0.0 filtering is disabled.
+
+@item pl
+Set the amount of preserving lightness. Default value is 0.0. Allowed range is from 0.0 to 1.0.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
+@section colorcorrect
+
+Adjust color white balance selectively for blacks and whites.
+This filter operates in YUV colorspace.
+
+The filter accepts the following options:
+
+@table @option
+@item rl
+Set the red shadow spot. Allowed range is from -1.0 to 1.0.
+Default value is 0.
+
+@item bl
+Set the blue shadow spot. Allowed range is from -1.0 to 1.0.
+Default value is 0.
+
+@item rh
+Set the red highlight spot. Allowed range is from -1.0 to 1.0.
+Default value is 0.
+
+@item bh
+Set the red highlight spot. Allowed range is from -1.0 to 1.0.
+Default value is 0.
+
+@item saturation
+Set the amount of saturation. Allowed range is from -3.0 to 3.0.
+Default value is 1.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section colorchannelmixer
Adjust video input frames by re-mixing color channels.
Default is @code{1} for @var{aa}, and @code{0} for @var{ar}, @var{ag} and @var{ab}.
Allowed ranges for options are @code{[-2.0, 2.0]}.
+
+@item pl
+Preserve lightness when changing colors. Allowed range is from @code{[0.0, 1.0]}.
+Default is @code{0.0}, thus disabled.
@end table
@subsection Examples
colorspace=smpte240m
@end example
+@section colortemperature
+Adjust color temperature in video to simulate variations in ambient color temperature.
+
+The filter accepts the following options:
+
+@table @option
+@item temperature
+Set the temperature in Kelvin. Allowed range is from 1000 to 40000.
+Default value is 6500 K.
+
+@item mix
+Set mixing with filtered output. Allowed range is from 0 to 1.
+Default value is 1.
+
+@item pl
+Set the amount of preserving lightness. Allowed range is from 0 to 1.
+Default value is 0.
+@end table
+
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
@section convolution
Apply convolution of 3x3, 5x5, 7x7 or horizontal/vertical up to 49 elements.
Default is @var{square}.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@subsection Examples
@itemize
get only even dimensions (needed for 4:2:2 video). 16 is best when
encoding to most video codecs.
+@item skip
+Set the number of initial frames for which evaluation is skipped.
+Default is 2. Range is 0 to INT_MAX.
+
@item reset_count, reset
Set the counter that determines after how many frames cropdetect will
reset the previously detected largest video area and start over to
@item format
Set display number format. Can be @code{hex}, or @code{dec}. Default is @code{hex}.
+
+@item components
+Set pixel components to display. By default all pixel components are displayed.
@end table
@section dblur
@end example
@end itemize
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@anchor{decimate}
@section decimate
Modify alpha from generated spillmap.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section detelecine
Apply an exact inverse of the telecine operation. It requires a predefined
@item output
Set the output name of the dnn network.
+@item async
+use DNN async execution if set (default: set),
+roll back to sync execution if the backend does not support async.
+
@end table
@subsection Examples
between neighbour histogram values.
@end table
+@section epx
+Apply the EPX magnification filter which is designed for pixel art.
+
+It accepts the following option:
+
+@table @option
+@item n
+Set the scaling dimension: @code{2} for @code{2xEPX}, @code{3} for
+@code{3xEPX}.
+Default is @code{3}.
+@end table
+
@section eq
Set brightness, contrast, saturation and approximate gamma adjustment.
This filter supports the all above options as @ref{commands}.
+@section estdif
+
+Deinterlace the input video ("estdif" stands for "Edge Slope
+Tracing Deinterlacing Filter").
+
+Spatial only filter that uses edge slope tracing algorithm
+to interpolate missing lines.
+It accepts the following parameters:
+
+@table @option
+@item mode
+The interlacing mode to adopt. It accepts one of the following values:
+
+@table @option
+@item frame
+Output one frame for each frame.
+@item field
+Output one frame for each field.
+@end table
+
+The default value is @code{field}.
+
+@item parity
+The picture field parity assumed for the input interlaced video. It accepts one
+of the following values:
+
+@table @option
+@item tff
+Assume the top field is first.
+@item bff
+Assume the bottom field is first.
+@item auto
+Enable automatic detection of field parity.
+@end table
+
+The default value is @code{auto}.
+If the interlacing is unknown or the decoder does not export this information,
+top field first will be assumed.
+
+@item deint
+Specify which frames to deinterlace. Accepts one of the following
+values:
+
+@table @option
+@item all
+Deinterlace all frames.
+@item interlaced
+Only deinterlace frames marked as interlaced.
+@end table
+
+The default value is @code{all}.
+
+@item rslope
+Specify the search radius for edge slope tracing. Default value is 1.
+Allowed range is from 1 to 15.
+
+@item redge
+Specify the search radius for best edge matching. Default value is 2.
+Allowed range is from 0 to 15.
+
+@item interp
+Specify the interpolation used. Default is 4-point interpolation. It accepts one
+of the following values:
+
+@table @option
+@item 2p
+Two-point interpolation.
+@item 4p
+Four-point interpolation.
+@item 6p
+Six-point interpolation.
+@end table
+@end table
+
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
@section extractplanes
Extract color channel components from input video stream into
fill pixels using outermost pixels
@item mirror
-fill pixels using mirroring
+fill pixels using mirroring (half sample symmetric)
@item fixed
fill pixels with constant value
+
+@item reflect
+fill pixels using reflecting (whole sample symmetric)
+
+@item wrap
+fill pixels using wrapping
+
+@item fade
+fade pixels to constant value
@end table
Default is @var{smear}.
@item color
-Set color for pixels in fixed mode. Default is @var{black}.
+Set color for pixels in fixed or fade mode. Default is @var{black}.
@end table
@subsection Commands
For more information, see
@url{http://frei0r.dyne.org}
+@subsection Commands
+
+This filter supports the @option{filter_params} option as @ref{commands}.
+
@section fspp
Apply fast and simple postprocessing. It is a faster version of @ref{spp}.
@end example
@end itemize
+@section kirsch
+Apply kirsch operator to input video stream.
+
+The filter accepts the following option:
+
+@table @option
+@item planes
+Set which planes will be processed, unprocessed planes will be copied.
+By default value 0xf, all planes will be processed.
+
+@item scale
+Set value which will be multiplied with filtered result.
+
+@item delta
+Set value which will be added to filtered result.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section lagfun
Slowly update darker pixels.
Set which planes to filter. Default is all. Allowed range is from 0 to 15.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section lenscorrection
Correct radial lens distortion
@item k2
Coefficient of the double quadratic correction term. This value has a range [-1,1].
0 means no correction. Default is 0.
+@item i
+Set interpolation type. Can be @code{nearest} or @code{bilinear}.
+Default is @code{nearest}.
+@item fc
+Specify the color of the unmapped pixels. For the syntax of this option,
+check the @ref{color syntax,,"Color" section in the ffmpeg-utils
+manual,ffmpeg-utils}. Default color is @code{black@@0}.
@end table
The formula that generates the correction is:
where @var{r_0} is halve of the image diagonal and @var{r_src} and @var{r_tgt} are the
distances from the focal point in the source and target images, respectively.
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section lensfun
Apply lens correction via the lensfun library (@url{http://lensfun.sourceforge.net/}).
Specify which planes will be processed. Defaults to all available.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section loop
Loop video frames.
@end table
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@anchor{lut3d}
@section lut3d
Interpolate values using the 8 points defining a cube.
@item tetrahedral
Interpolate values using a tetrahedron.
+@item pyramid
+Interpolate values using a pyramid.
+@item prism
+Interpolate values using a prism.
@end table
@end table
By default value 0xf, all planes will be processed.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section maskedmax
Merge the second and third input stream into output stream using absolute differences
By default value 0xf, all planes will be processed.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section maskedmerge
Merge the first input stream with the second input stream using per pixel
By default value 0xf, all planes will be processed.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section maskedmin
Merge the second and third input stream into output stream using absolute differences
By default value 0xf, all planes will be processed.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section maskedthreshold
Pick pixels comparing absolute difference of two video streams with fixed
threshold.
By default value 0xf, all planes will be processed.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section maskfun
Create mask from input video.
@end table
@end table
+@subsection Commands
+
+This filter supports the following commands:
+@table @option
+@item weights
+@item scale
+Syntax is same as option with same name.
+@end table
+
@section mpdecimate
Drop frames that do not differ greatly from the previous frame in
Can be one of the following:
@table @samp
-@item a
+@item a, abs
weights trained to minimize absolute error
-@item s
+@item s, mse
weights trained to minimize squared error
@end table
@item none
@item original
@item new
+@item new2
+@item new3
@end table
Default is @code{new}.
-
-@item fapprox
-Set various debugging flags.
@end table
+@subsection Commands
+This filter supports same @ref{commands} as options, excluding @var{weights} option.
+
@section noformat
Force libavfilter not to use any of the specified pixel formats for the
Overlay one video on top of another.
-This is the CUDA cariant of the @ref{overlay} filter.
+This is the CUDA variant of the @ref{overlay} filter.
It only accepts CUDA frames. The underlying input pixel formats have to match.
It takes two inputs and has one output. The first input is the "main"
@end table
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section photosensitivity
Reduce various flashes in video, so to help users with epilepsy.
Set value which will be added to filtered result.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section pseudocolor
Alter frame colors in video with pseudocolors.
@item i
set component to use as base for altering colors
+
+@item p
+Pick one of built-in LUTs. By default is set to none.
+
+Available LUTs:
+@table @samp
+@item magma
+@item inferno
+@item plasma
+@item viridis
+@item turbo
+@item cividis
+@item range1
+@item range2
+@end table
+
@end table
Each of them specifies the expression to use for computing the lookup table for
All expressions default to "val".
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@subsection Examples
@itemize
Lowpass lines prior to further processing. Default is enabled.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@subsection Examples
@itemize
Set value which will be added to filtered result.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section rotate
Rotate video by an arbitrary angle expressed in radians.
@end table
@end table
+@section shear
+Apply shear transform to input video.
+
+This filter supports the following options:
+
+@table @option
+@item shx
+Shear factor in X-direction. Default value is 0.
+Allowed range is from -2 to 2.
+
+@item shy
+Shear factor in Y-direction. Default value is 0.
+Allowed range is from -2 to 2.
+
+@item fillcolor, c
+Set the color used to fill the output area not covered by the transformed
+video. For the general syntax of this option, check the
+@ref{color syntax,,"Color" section in the ffmpeg-utils manual,ffmpeg-utils}.
+If the special value "none" is selected then no
+background is printed (useful for example if the background is never shown).
+
+Default value is "black".
+
+@item interp
+Set interpolation type. Can be @code{bilinear} or @code{nearest}. Default is @code{bilinear}.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section showinfo
Show a line containing various information for each input video frame.
@end example
@end itemize
+@section shufflepixels
+
+Reorder pixels in video frames.
+
+This filter accepts the following options:
+
+@table @option
+@item direction, d
+Set shuffle direction. Can be forward or inverse direction.
+Default direction is forward.
+
+@item mode, m
+Set shuffle mode. Can be horizontal, vertical or block mode.
+
+@item width, w
+@item height, h
+Set shuffle block_size. In case of horizontal shuffle mode only width
+part of size is used, and in case of vertical shuffle mode only height
+part of size is used.
+
+@item seed, s
+Set random seed used with shuffling pixels. Mainly useful to set to be able
+to reverse filtering process to get original input.
+For example, to reverse forward shuffle you need to use same parameters
+and exact same seed and to set direction to inverse.
+@end table
+
@section shuffleplanes
Reorder and/or duplicate video planes.
Set value which will be added to filtered result.
@end table
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@anchor{spp}
@section spp
@item ecolor, ec
Set envelope color. Default is @code{gold}.
+
+@item slide
+Set slide mode.
+
+Available values for slide is:
+@table @samp
+@item frame
+Draw new frame when right border is reached.
+
+@item replace
+Replace old columns with new ones.
+
+@item scroll
+Scroll from right to left.
+
+@item rscroll
+Scroll from left to right.
+
+@item picture
+Draw single picture.
+@end table
+
+Default is @code{replace}.
@end table
@section threshold
minimum values, and @code{1} maximum values.
@end table
+@subsection Commands
+
+This filter supports all above options as @ref{commands}, excluding option @code{radius}.
+
+@section tmidequalizer
+
+Apply Temporal Midway Video Equalization effect.
+
+Midway Video Equalization adjusts a sequence of video frames to have the same
+histograms, while maintaining their dynamics as much as possible. It's
+useful for e.g. matching exposures from a video frames sequence.
+
+This filter accepts the following option:
+
+@table @option
+@item radius
+Set filtering radius. Default is @code{5}. Allowed range is from 1 to 127.
+
+@item sigma
+Set filtering sigma. Default is @code{0.5}. This controls strength of filtering.
+Setting this option to 0 effectively does nothing.
+
+@item planes
+Set which planes to process. Default is @code{15}, which is all available planes.
+@end table
+
@section tmix
Mix successive video frames.
@end example
@end itemize
+@subsection Commands
+
+This filter supports the following commands:
+@table @option
+@item weights
+@item scale
+Syntax is same as option with same name.
+@end table
+
@anchor{tonemap}
@section tonemap
Tone map colors from different dynamic ranges.
If diagonal field of view is set it overrides horizontal and vertical field of view.
@end table
+
+@item octahedron
+Octahedron projection.
@end table
@item interp
@item gauss
@item gaussian
Gaussian interpolation.
+@item mitchell
+Mitchell interpolation.
@end table
Default value is @b{@samp{line}}.
@end table
Default value is @samp{complex}.
+@item mode
+The interlacing mode to adopt. It accepts one of the following values:
+
+@table @option
+@item frame
+Output one frame for each frame.
+@item field
+Output one frame for each field.
+@end table
+
+The default value is @code{field}.
+
+@item parity
+The picture field parity assumed for the input interlaced video. It accepts one
+of the following values:
+
+@table @option
+@item tff
+Assume the top field is first.
+@item bff
+Assume the bottom field is first.
+@item auto
+Enable automatic detection of field parity.
+@end table
+
+The default value is @code{auto}.
+If the interlacing is unknown or the decoder does not export this information,
+top field first will be assumed.
+
@item deint
Specify which frames to deinterlace. Accepts one of the following values:
Default value is @samp{all}.
@end table
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
@section waveform
Video waveform monitor.
@item wipetr
@item wipebl
@item wipebr
+@item squeezeh
+@item squeezev
@end table
Default transition effect is fade.
minimum values, and @code{1} maximum values.
@end table
+@subsection Commands
+
+This filter supports all above options as @ref{commands}, excluding option @code{inputs}.
+
@section xstack
Stack video inputs into custom layout.
Enable video output. Default is enabled.
@end table
+@subsection phasing detection
+
+The filter also detects out of phase and mono sequences in stereo streams.
+It logs the sequence start, end and duration when it lasts longer or as long as the minimum set.
+
+The filter accepts the following options for this detection:
+
+@table @option
+@item phasing
+Enable mono and out of phase detection. Default is disabled.
+
+@item tolerance, t
+Set phase tolerance for mono detection, in amplitude ratio. Default is @code{0}.
+Allowed range is @code{[0, 1]}.
+
+@item angle, a
+Set angle threshold for out of phase detection, in degree. Default is @code{170}.
+Allowed range is @code{[90, 180]}.
+
+@item duration, d
+Set mono or out of phase duration until notification, expressed in seconds. Default is @code{2}.
+@end table
+
+@subsection Examples
+
+@itemize
+@item
+Complete example with @command{ffmpeg} to detect 1 second of mono with 0.001 phase tolerance:
+@example
+ffmpeg -i stereo.wav -af aphasemeter=video=0:phasing=1:duration=1:tolerance=0.001 -f null -
+@end example
+@end itemize
+
@section avectorscope
Convert input audio to a video output, representing the audio vector
@item minamp
Set minimum amplitude used in @code{log} amplitude scaler.
+@item data
+Set data display mode.
+
+It accepts the following values:
+@table @samp
+@item magnitude
+@item phase
+@item delay
+@end table
+Default is @code{magnitude}.
@end table
@section showspatial
projects / ffmpeg / blobdiff