@end table
@section acontrast
-Simple audio dynamic range commpression/expansion filter.
+Simple audio dynamic range compression/expansion filter.
The filter accepts the following options:
@item b
Set burst fusion, in percentage of window size. Allowed range is @code{0} to
@code{10}. Default value is @code{2}.
-If any two samples deteced as noise are spaced less than this value then any
-sample inbetween those two samples will be also detected as noise.
+If any two samples detected as noise are spaced less than this value then any
+sample between those two samples will be also detected as noise.
@item m
Set overlap method.
Unused delays will be silently ignored. If number of given delays is
smaller than number of channels all remaining channels will not be delayed.
If you want to delay exact number of samples, append 'S' to number.
+If you want instead to delay in seconds, append 's' to number.
@end table
@subsection Examples
select double-exponential sigmoid
@item losi
select logistic sigmoid
+@item nofade
+no fade applied
@end table
@end table
@table @option
@item real
Set frequency domain real expression for each separate channel separated
-by '|'. Default is "1".
+by '|'. Default is "re".
If the number of input channels is greater than the number of
expressions, the last specified expression is used for the remaining
output channels.
@item imag
Set frequency domain imaginary expression for each separate channel
-separated by '|'. If not set, @var{real} option is used.
+separated by '|'. Default is "im".
Each expression in @var{real} and @var{imag} can contain the following
-constants:
+constants and functions:
@table @option
@item sr
@item pts
current frame pts
+
+@item re
+current real part of frequency bin of current channel
+
+@item im
+current imaginary part of frequency bin of current channel
+
+@item real(b, ch)
+Return the value of real part of frequency bin at location (@var{bin},@var{channel})
+
+@item imag(b, ch)
+Return the value of imaginary part of frequency bin at location (@var{bin},@var{channel})
@end table
@item win_size
@item
Leave almost only low frequencies in audio:
@example
-afftfilt="1-clip((b/nb)*b,0,1)"
+afftfilt="'real=re * (1-clip((b/nb)*b,0,1))':imag='im * (1-clip((b/nb)*b,0,1))'"
@end example
@end itemize
It can be used as component for digital crossover filters,
room equalization, cross talk cancellation, wavefield synthesis,
-auralization, ambiophonics and ambisonics.
+auralization, ambiophonics, ambisonics and spatialization.
This filter uses second stream as FIR coefficients.
If second stream holds single channel, it will be used
Allowed range is 0.1 to 60 seconds.
@item response
-Show IR frequency reponse, magnitude(magenta) and phase(green) and group delay(yellow) in additional video stream.
+Show IR frequency response, magnitude(magenta), phase(green) and group delay(yellow) in additional video stream.
By default it is disabled.
@item channel
@item size
Set video stream size. This option is used only when @var{response} is enabled.
+
+@item rate
+Set video stream frame rate. This option is used only when @var{response} is enabled.
+
+@item minp
+Set minimal partition size used for convolution. Default is @var{8192}.
+Allowed range is from @var{8} to @var{32768}.
+Lower values decreases latency at cost of higher CPU usage.
+
+@item maxp
+Set maximal partition size used for convolution. Default is @var{8192}.
+Allowed range is from @var{8} to @var{32768}.
+Lower values may increase CPU usage.
@end table
@subsection Examples
@item r
Set kind of processing.
-Can be @code{d} - direct or @code{s} - serial cascading. Defauls is @code{s}.
+Can be @code{d} - direct or @code{s} - serial cascading. Default is @code{s}.
@item e
Set filtering precision.
@end table
@item response
-Show IR frequency reponse, magnitude and phase in additional video stream.
+Show IR frequency response, magnitude and phase in additional video stream.
By default it is disabled.
@item channel
@itemize
@item
-Apply 2 pole elliptic notch at arround 5000Hz for 48000 Hz sample rate:
+Apply 2 pole elliptic notch at around 5000Hz for 48000 Hz sample rate:
@example
aiir=k=1:z=7.957584807809675810E-1 -2.575128568908332300 3.674839853930788710 -2.57512875289799137 7.957586296317130880E-1:p=1 -2.86950072432325953 3.63022088054647218 -2.28075678147272232 6.361362326477423500E-1:f=tf:r=d
@end example
asendcmd=c='4.0 anequalizer change 0|f=200|w=50|g=1',anequalizer=...
@end table
+@section anlmdn
+
+Reduce broadband noise in audio samples using Non-Local Means algorithm.
+
+Each sample is adjusted by looking for other samples with similar contexts. This
+context similarity is defined by comparing their surrounding patches of size
+@option{p}. Patches are searched in an area of @option{r} around the sample.
+
+The filter accepts the following options.
+
+@table @option
+@item s
+Set denoising strength. Allowed range is from 0.00001 to 10. Default value is 0.00001.
+
+@item p
+Set patch radius duration. Allowed range is from 1 to 100 milliseconds.
+Default value is 2 milliseconds.
+
+@item r
+Set research radius duration. Allowed range is from 2 to 300 milliseconds.
+Default value is 6 milliseconds.
+
+@item o
+Set the output mode.
+
+It accepts the following values:
+@table @option
+@item i
+Pass input unchanged.
+
+@item o
+Pass noise filtered out.
+
+@item n
+Pass only noise.
+
+Default value is @var{o}.
+@end table
+@end table
+
@section anull
Pass the audio source unchanged to the output.
the value is longer than the input audio length, silence is added to
the end, until the value is reached. This option is mutually exclusive
with @option{pad_len}.
+
+@item pad_dur
+Specify the duration of samples of silence to add. See
+@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
+for the accepted syntax. Used only if set to non-zero value.
+
+@item whole_dur
+Specify the minimum total duration in the output audio stream. See
+@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
+for the accepted syntax. Used only if set to non-zero value. If the value is longer than
+the input audio length, silence is added to the end, until the value is reached.
+This option is mutually exclusive with @option{pad_dur}
@end table
-If neither the @option{pad_len} nor the @option{whole_len} option is
-set, the filter will add silence to the end of the input stream
-indefinitely.
+If neither the @option{pad_len} nor the @option{whole_len} nor @option{pad_dur}
+nor @option{whole_dur} option is set, the filter will add silence to the end of
+the input stream indefinitely.
@subsection Examples
@item reset
Set number of frame after which stats are going to be recalculated.
Default is disabled.
+
+@item measure_perchannel
+Select the entries which need to be measured per channel. The metadata keys can
+be used as flags, default is @option{all} which measures everything.
+@option{none} disables all per channel measurement.
+
+@item measure_overall
+Select the entries which need to be measured overall. The metadata keys can
+be used as flags, default is @option{all} which measures everything.
+@option{none} disables all overall measurement.
+
@end table
A description of each shown parameter follows:
each amovie filter use stereo file with IR coefficients as input.
The files give coefficients for each position of virtual loudspeaker:
@example
-ffmpeg -i input.wav -lavfi-complex "amovie=azi_270_ele_0_DFC.wav[sr],amovie=azi_90_ele_0_DFC.wav[sl],amovie=azi_225_ele_0_DFC.wav[br],amovie=azi_135_ele_0_DFC.wav[bl],amovie=azi_0_ele_0_DFC.wav,asplit[fc][lfe],amovie=azi_35_ele_0_DFC.wav[fl],amovie=azi_325_ele_0_DFC.wav[fr],[a:0][fl][fr][fc][lfe][bl][br][sl][sr]headphone=FL|FR|FC|LFE|BL|BR|SL|SR"
+ffmpeg -i input.wav
+-filter_complex "amovie=azi_270_ele_0_DFC.wav[sr];amovie=azi_90_ele_0_DFC.wav[sl];amovie=azi_225_ele_0_DFC.wav[br];amovie=azi_135_ele_0_DFC.wav[bl];amovie=azi_0_ele_0_DFC.wav,asplit[fc][lfe];amovie=azi_35_ele_0_DFC.wav[fl];amovie=azi_325_ele_0_DFC.wav[fr];[0:a][fl][fr][fc][lfe][bl][br][sl][sr]headphone=FL|FR|FC|LFE|BL|BR|SL|SR"
output.wav
@end example
Full example using wav files as coefficients with amovie filters for 7.1 downmix,
but now in @var{multich} @var{hrir} format.
@example
-ffmpeg -i input.wav -lavfi-complex "amovie=minp.wav[hrirs],[a:0][hrirs]headphone=map=FL|FR|FC|LFE|BL|BR|SL|SR:hrir=multich"
+ffmpeg -i input.wav -filter_complex "amovie=minp.wav[hrirs];[0:a][hrirs]headphone=map=FL|FR|FC|LFE|BL|BR|SL|SR:hrir=multich"
output.wav
@end example
@end itemize
@item lfegain
Set custom gain for LFE channels. Value is in dB. Default is 0.
+
+@item framesize
+Set custom frame size in number of samples. Default is 1024.
+Allowed range is from 1024 to 96000. Only used if option @samp{type}
+is set to @var{freq}.
+
+@item normalize
+Should all IRs be normalized upon importing SOFA file.
+By default is enabled.
+
+@item interpolate
+Should nearest IRs be interpolated with neighbor IRs if exact position
+does not match. By default is disabled.
+
+@item minphase
+Minphase all IRs upon loading of SOFA file. By default is disabled.
+
+@item anglestep
+Set neighbor search angle step. Only used if option @var{interpolate} is enabled.
+
+@item radstep
+Set neighbor search radius step. Only used if option @var{interpolate} is enabled.
@end table
@subsection Examples
Set factor to amplify difference. Default is 2. Allowed range is from 0 to 65535.
@item threshold
-Set threshold for difference amplification. Any differrence greater or equal to
+Set threshold for difference amplification. Any difference greater or equal to
this value will not alter source pixel. Default is 10.
Allowed range is from 0 to 65535.
+@item tolerance
+Set tolerance for difference amplification. Any difference lower to
+this value will not alter source pixel. Default is 0.
+Allowed range is from 0 to 65535.
+
@item low
Set lower limit for changing source pixel. Default is 65535. Allowed range is from 0 to 65535.
This option controls maximum possible value that will decrease source pixel value.
@item sigma
Set denoising strength. Default value is 1.
Allowed range is from 0 to 999.9.
-The denoising algorith is very sensitive to sigma, so adjust it
+The denoising algorithm is very sensitive to sigma, so adjust it
according to the source.
@item block
@end example
@end itemize
+@section chromashift
+Shift chroma pixels horizontally and/or vertically.
+
+The filter accepts the following options:
+@table @option
+@item cbh
+Set amount to shift chroma-blue horizontally.
+@item cbv
+Set amount to shift chroma-blue vertically.
+@item crh
+Set amount to shift chroma-red horizontally.
+@item crv
+Set amount to shift chroma-red vertically.
+@item edge
+Set edge mode, can be @var{smear}, default, or @var{warp}.
+@end table
+
@section ciescope
Display CIE color diagram with pixels overlaid onto it.
The @code{deconvolve} filter also supports the @ref{framesync} options.
+@section dedot
+
+Reduce cross-luminance (dot-crawl) and cross-color (rainbows) from video.
+
+It accepts the following options:
+
+@table @option
+@item m
+Set mode of operation. Can be combination of @var{dotcrawl} for cross-luminance reduction and/or
+@var{rainbows} for cross-color reduction.
+
+@item lt
+Set spatial luma threshold. Lower values increases reduction of cross-luminance.
+
+@item tl
+Set tolerance for temporal luma. Higher values increases reduction of cross-luminance.
+
+@item tc
+Set tolerance for chroma temporal variation. Higher values increases reduction of cross-color.
+
+@item ct
+Set temporal chroma threshold. Lower values increases reduction of cross-color.
+@end table
+
@section deflate
Apply deflate effect to the video.
Allowed values are positive integers higher than 0. Default value is @code{1}.
@end table
+@section freezedetect
+
+Detect frozen video.
+
+This filter logs a message and sets frame metadata when it detects that the
+input video has no significant change in content during a specified duration.
+Video freeze detection calculates the mean average absolute difference of all
+the components of video frames and compares it to a noise floor.
+
+The printed times and duration are expressed in seconds. The
+@code{lavfi.freezedetect.freeze_start} metadata key is set on the first frame
+whose timestamp equals or exceeds the detection duration and it contains the
+timestamp of the first frame of the freeze. The
+@code{lavfi.freezedetect.freeze_duration} and
+@code{lavfi.freezedetect.freeze_end} metadata keys are set on the first frame
+after the freeze.
+
+The filter accepts the following options:
+
+@table @option
+@item noise, n
+Set noise tolerance. Can be specified in dB (in case "dB" is appended to the
+specified value) or as a difference ratio between 0 and 1. Default is -60dB, or
+0.001.
+
+@item duration, d
+Set freeze duration until notification (default is 2 seconds).
+@end table
+
@anchor{frei0r}
@section frei0r
Set horizontal sigma, standard deviation of Gaussian blur. Default is @code{0.5}.
@item steps
-Set number of steps for Gaussian approximation. Defauls is @code{1}.
+Set number of steps for Gaussian approximation. Default is @code{1}.
@item planes
Set which planes to filter. By default all planes are filtered.
@item sigma
The standard deviation of Gaussian blur to be applied on the scene. Must be
chosen in the range [0,1024.0] and default value = 1. floor( @var{sigma} * break_off_sigma(3) )
-can't be euqal to 0 if @var{difford} is greater than 0.
+can't be equal to 0 if @var{difford} is greater than 0.
@end table
@subsection Examples
@var{luma_tmp}*@var{chroma_spatial}/@var{luma_spatial}.
@end table
+@anchor{hwdownload}
@section hwdownload
Download hardware frames to system memory.
Do not use it without fully understanding the implications of its use.
@end table
+@anchor{hwupload}
@section hwupload
Upload system memory frames to hardware surfaces.
Set the format of the log file (xml or json).
@item enable_transform
-Enables transform for computing vmaf.
+This option can enable/disable the @code{score_transform} applied to the final predicted VMAF score,
+if you have specified score_transform option in the input parameter file passed to @code{run_vmaf_training.py}
+Default value: @code{false}
@item phone_model
Invokes the phone model which will generate VMAF scores higher than in the
Example with options:
@example
-ffmpeg -i main.mpg -i ref.mpg -lavfi libvmaf="psnr=1:enable-transform=1" -f null -
+ffmpeg -i main.mpg -i ref.mpg -lavfi libvmaf="psnr=1:log_fmt=json" -f null -
@end example
@section limiter
Use values from the nearest defined point.
@item linear
Interpolate values using the linear interpolation.
+@item cosine
+Interpolate values using the cosine interpolation.
@item cubic
Interpolate values using the cubic interpolation.
+@item spline
+Interpolate values using the spline interpolation.
@end table
@end table
set third pixel component expression
@item c3
set fourth pixel component expression, corresponds to the alpha component
+
+@item d
+set output bit depth, only available for @code{lut2} filter. By default is 0,
+which means bit depth is automatically picked from first input format.
@end table
Each of them specifies the expression to use for computing the lookup table for
By default value 0xf, all planes will be processed.
@end table
+@section maskfun
+Create mask from input video.
+
+For example it is useful to create motion masks after @code{tblend} filter.
+
+This filter accepts the following options:
+
+@table @option
+@item low
+Set low threshold. Any pixel component lower or exact than this value will be set to 0.
+
+@item high
+Set high threshold. Any pixel component higher than this value will be set to max value
+allowed for current pixel format.
+
+@item planes
+Set planes to filter, by default all available planes are filtered.
+
+@item fill
+Fill all frame pixels with this value.
+
+@item sum
+Set max average pixel value for frame. If sum of all pixel components is higher that this
+average, output frame will be completely filled with value set by @var{fill} option.
+Typically useful for scene changes when used in combination with @code{tblend} filter.
+@end table
+
@section mcdeint
Apply motion-compensation deinterlacing.
@table @option
@item s
-Set denoising strength.
+Set denoising strength. Default is 1.0. Must be in range [1.0, 30.0].
@item p
-Set patch size.
+Set patch size. Default is 7. Must be odd number in range [0, 99].
@item pc
Same as @option{p} but for chroma planes.
The default value is @var{0} and means automatic.
@item r
-Set research size.
+Set research size. Default is 15. Must be odd number in range [0, 99].
@item rc
Same as @option{r} but for chroma planes.
@end example
@end itemize
+@section rgbashift
+Shift R/G/B/A pixels horizontally and/or vertically.
+
+The filter accepts the following options:
+@table @option
+@item rh
+Set amount to shift red horizontally.
+@item rv
+Set amount to shift red vertically.
+@item gh
+Set amount to shift green horizontally.
+@item gv
+Set amount to shift green vertically.
+@item bh
+Set amount to shift blue horizontally.
+@item bv
+Set amount to shift blue vertically.
+@item ah
+Set amount to shift alpha horizontally.
+@item av
+Set amount to shift alpha vertically.
+@item edge
+Set edge mode, can be @var{smear}, default, or @var{warp}.
+@end table
+
@section roberts
Apply roberts cross operator to input video stream.
@end table
@item color_trc
-Set the color transfert.
+Set the color transfer.
Available values are:
@table @samp
Show a line containing various information for each input video frame.
The input video is not modified.
+This filter supports the following options:
+
+@table @option
+@item checksum
+Calculate checksums of each plane. By default enabled.
+@end table
+
The shown line contains a sequence of key/value pairs of the form
@var{key}:@var{value}.
@end example
@end itemize
+@anchor{tonemap}
@section tonemap
Tone map colors from different dynamic ranges.
mapping from a lower range to a higher range.
@end table
+@section tpad
+
+Temporarily pad video frames.
+
+The filter accepts the following options:
+
+@table @option
+@item start
+Specify number of delay frames before input video stream.
+
+@item stop
+Specify number of padding frames after input video stream.
+Set to -1 to pad indefinitely.
+
+@item start_mode
+Set kind of frames added to beginning of stream.
+Can be either @var{add} or @var{clone}.
+With @var{add} frames of solid-color are added.
+With @var{clone} frames are clones of first frame.
+
+@item stop_mode
+Set kind of frames added to end of stream.
+Can be either @var{add} or @var{clone}.
+With @var{add} frames of solid-color are added.
+With @var{clone} frames are clones of last frame.
+
+@item start_duration, stop_duration
+Specify the duration of the start/stop delay. See
+@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
+for the accepted syntax.
+These options override @var{start} and @var{stop}.
+
+@item color
+Specify the color of the padded area. For the syntax of this option,
+check the @ref{color syntax,,"Color" section in the ffmpeg-utils
+manual,ffmpeg-utils}.
+
+The default value of @var{color} is "black".
+@end table
+
@anchor{transpose}
@section transpose
It accepts the following parameters:
+@table @option
+
+@item mode
+The interlacing mode to adopt. It accepts one of the following values:
+
+@table @option
+@item 0, send_frame
+Output one frame for each frame.
+@item 1, send_field
+Output one frame for each field.
+@item 2, send_frame_nospatial
+Like @code{send_frame}, but it skips the spatial interlacing check.
+@item 3, send_field_nospatial
+Like @code{send_field}, but it skips the spatial interlacing check.
+@end table
+
+The default value is @code{send_frame}.
+
+@item parity
+The picture field parity assumed for the input interlaced video. It accepts one
+of the following values:
+
+@table @option
+@item 0, tff
+Assume the top field is first.
+@item 1, bff
+Assume the bottom field is first.
+@item -1, 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. Accept one of the following
+values:
+
+@table @option
+@item 0, all
+Deinterlace all frames.
+@item 1, interlaced
+Only deinterlace frames marked as interlaced.
+@end table
+
+The default value is @code{all}.
+@end table
+
+@section yadif_cuda
+
+Deinterlace the input video using the @ref{yadif} algorithm, but implemented
+in CUDA so that it can work as part of a GPU accelerated pipeline with nvdec
+and/or nvenc.
+
+It accepts the following parameters:
+
+
@table @option
@item mode
@c man end VIDEO FILTERS
+@chapter OpenCL Video Filters
+@c man begin OPENCL VIDEO FILTERS
+
+Below is a description of the currently available OpenCL video filters.
+
+To enable compilation of these filters you need to configure FFmpeg with
+@code{--enable-opencl}.
+
+Running OpenCL filters requires you to initialize a hardware device and to pass that device to all filters in any filter graph.
+@table @option
+
+@item -init_hw_device opencl[=@var{name}][:@var{device}[,@var{key=value}...]]
+Initialise a new hardware device of type @var{opencl} called @var{name}, using the
+given device parameters.
+
+@item -filter_hw_device @var{name}
+Pass the hardware device called @var{name} to all filters in any filter graph.
+
+@end table
+
+For more detailed information see @url{https://www.ffmpeg.org/ffmpeg.html#Advanced-Video-options}
+
+@itemize
+@item
+Example of choosing the first device on the second platform and running avgblur_opencl filter with default parameters on it.
+@example
+-init_hw_device opencl=gpu:1.0 -filter_hw_device gpu -i INPUT -vf "hwupload, avgblur_opencl, hwdownload" OUTPUT
+@end example
+@end itemize
+
+Since OpenCL filters are not able to access frame data in normal memory, all frame data needs to be uploaded(@ref{hwupload}) to hardware surfaces connected to the appropriate device before being used and then downloaded(@ref{hwdownload}) back to normal memory. Note that @ref{hwupload} will upload to a surface with the same layout as the software frame, so it may be necessary to add a @ref{format} filter immediately before to get the input into the right format and @ref{hwdownload} does not support all formats on the output - it may be necessary to insert an additional @ref{format} filter immediately following in the graph to get the output in a supported format.
+
+@section avgblur_opencl
+
+Apply average blur filter.
+
+The filter accepts the following options:
+
+@table @option
+@item sizeX
+Set horizontal radius size.
+Range is @code{[1, 1024]} and default value is @code{1}.
+
+@item planes
+Set which planes to filter. Default value is @code{0xf}, by which all planes are processed.
+
+@item sizeY
+Set vertical radius size. Range is @code{[1, 1024]} and default value is @code{0}. If zero, @code{sizeX} value will be used.
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply average blur filter with horizontal and vertical size of 3, setting each pixel of the output to the average value of the 7x7 region centered on it in the input. For pixels on the edges of the image, the region does not extend beyond the image boundaries, and so out-of-range coordinates are not used in the calculations.
+@example
+-i INPUT -vf "hwupload, avgblur_opencl=3, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section boxblur_opencl
+
+Apply a boxblur algorithm to the input video.
+
+It accepts the following parameters:
+
+@table @option
+
+@item luma_radius, lr
+@item luma_power, lp
+@item chroma_radius, cr
+@item chroma_power, cp
+@item alpha_radius, ar
+@item alpha_power, ap
+
+@end table
+
+A description of the accepted options follows.
+
+@table @option
+@item luma_radius, lr
+@item chroma_radius, cr
+@item alpha_radius, ar
+Set an expression for the box radius in pixels used for blurring the
+corresponding input plane.
+
+The radius value must be a non-negative number, and must not be
+greater than the value of the expression @code{min(w,h)/2} for the
+luma and alpha planes, and of @code{min(cw,ch)/2} for the chroma
+planes.
+
+Default value for @option{luma_radius} is "2". If not specified,
+@option{chroma_radius} and @option{alpha_radius} default to the
+corresponding value set for @option{luma_radius}.
+
+The expressions can contain the following constants:
+@table @option
+@item w
+@item h
+The input width and height in pixels.
+
+@item cw
+@item ch
+The input chroma image width and height in pixels.
+
+@item hsub
+@item vsub
+The horizontal and vertical chroma subsample values. For example, for the
+pixel format "yuv422p", @var{hsub} is 2 and @var{vsub} is 1.
+@end table
+
+@item luma_power, lp
+@item chroma_power, cp
+@item alpha_power, ap
+Specify how many times the boxblur filter is applied to the
+corresponding plane.
+
+Default value for @option{luma_power} is 2. If not specified,
+@option{chroma_power} and @option{alpha_power} default to the
+corresponding value set for @option{luma_power}.
+
+A value of 0 will disable the effect.
+@end table
+
+@subsection Examples
+
+Apply boxblur filter, setting each pixel of the output to the average value of box-radiuses @var{luma_radius}, @var{chroma_radius}, @var{alpha_radius} for each plane respectively. The filter will apply @var{luma_power}, @var{chroma_power}, @var{alpha_power} times onto the corresponding plane. For pixels on the edges of the image, the radius does not extend beyond the image boundaries, and so out-of-range coordinates are not used in the calculations.
+
+@itemize
+@item
+Apply a boxblur filter with the luma, chroma, and alpha radius
+set to 2 and luma, chroma, and alpha power set to 3. The filter will run 3 times with box-radius set to 2 for every plane of the image.
+@example
+-i INPUT -vf "hwupload, boxblur_opencl=luma_radius=2:luma_power=3, hwdownload" OUTPUT
+-i INPUT -vf "hwupload, boxblur_opencl=2:3, hwdownload" OUTPUT
+@end example
+
+@item
+Apply a boxblur filter with luma radius set to 2, luma_power to 1, chroma_radius to 4, chroma_power to 5, alpha_radius to 3 and alpha_power to 7.
+
+For the luma plane, a 2x2 box radius will be run once.
+
+For the chroma plane, a 4x4 box radius will be run 5 times.
+
+For the alpha plane, a 3x3 box radius will be run 7 times.
+@example
+-i INPUT -vf "hwupload, boxblur_opencl=2:1:4:5:3:7, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section convolution_opencl
+
+Apply convolution of 3x3, 5x5, 7x7 matrix.
+
+The filter accepts the following options:
+
+@table @option
+@item 0m
+@item 1m
+@item 2m
+@item 3m
+Set matrix for each plane.
+Matrix is sequence of 9, 25 or 49 signed numbers.
+Default value for each plane is @code{0 0 0 0 1 0 0 0 0}.
+
+@item 0rdiv
+@item 1rdiv
+@item 2rdiv
+@item 3rdiv
+Set multiplier for calculated value for each plane.
+If unset or 0, it will be sum of all matrix elements.
+The option value must be a float number greater or equal to @code{0.0}. Default value is @code{1.0}.
+
+@item 0bias
+@item 1bias
+@item 2bias
+@item 3bias
+Set bias for each plane. This value is added to the result of the multiplication.
+Useful for making the overall image brighter or darker.
+The option value must be a float number greater or equal to @code{0.0}. Default value is @code{0.0}.
+
+@end table
+
+@subsection Examples
+
+@itemize
+@item
+Apply sharpen:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 0 -1 0, hwdownload" OUTPUT
+@end example
+
+@item
+Apply blur:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=1 1 1 1 1 1 1 1 1:1 1 1 1 1 1 1 1 1:1 1 1 1 1 1 1 1 1:1 1 1 1 1 1 1 1 1:1/9:1/9:1/9:1/9, hwdownload" OUTPUT
+@end example
+
+@item
+Apply edge enhance:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:5:1:1:1:0:128:128:128, hwdownload" OUTPUT
+@end example
+
+@item
+Apply edge detect:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:5:5:5:1:0:128:128:128, hwdownload" OUTPUT
+@end example
+
+@item
+Apply laplacian edge detector which includes diagonals:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:5:5:5:1:0:128:128:0, hwdownload" OUTPUT
+@end example
+
+@item
+Apply emboss:
+@example
+-i INPUT -vf "hwupload, convolution_opencl=-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section dilation_opencl
+
+Apply dilation effect to the video.
+
+This filter replaces the pixel by the local(3x3) maximum.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Limit the maximum change for each plane. Range is @code{[0, 65535]} and default value is @code{65535}.
+If @code{0}, plane will remain unchanged.
+
+@item coordinates
+Flag which specifies the pixel to refer to.
+Range is @code{[0, 255]} and default value is @code{255}, i.e. all eight pixels are used.
+
+Flags to local 3x3 coordinates region centered on @code{x}:
+
+ 1 2 3
+
+ 4 x 5
+
+ 6 7 8
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply dilation filter with threshold0 set to 30, threshold1 set 40, threshold2 set to 50 and coordinates set to 231, setting each pixel of the output to the local maximum between pixels: 1, 2, 3, 6, 7, 8 of the 3x3 region centered on it in the input. If the difference between input pixel and local maximum is more then threshold of the corresponding plane, output pixel will be set to input pixel + threshold of corresponding plane.
+@example
+-i INPUT -vf "hwupload, dilation_opencl=30:40:50:coordinates=231, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section erosion_opencl
+
+Apply erosion effect to the video.
+
+This filter replaces the pixel by the local(3x3) minimum.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Limit the maximum change for each plane. Range is @code{[0, 65535]} and default value is @code{65535}.
+If @code{0}, plane will remain unchanged.
+
+@item coordinates
+Flag which specifies the pixel to refer to.
+Range is @code{[0, 255]} and default value is @code{255}, i.e. all eight pixels are used.
+
+Flags to local 3x3 coordinates region centered on @code{x}:
+
+ 1 2 3
+
+ 4 x 5
+
+ 6 7 8
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply erosion filter with threshold0 set to 30, threshold1 set 40, threshold2 set to 50 and coordinates set to 231, setting each pixel of the output to the local minimum between pixels: 1, 2, 3, 6, 7, 8 of the 3x3 region centered on it in the input. If the difference between input pixel and local minimum is more then threshold of the corresponding plane, output pixel will be set to input pixel - threshold of corresponding plane.
+@example
+-i INPUT -vf "hwupload, erosion_opencl=30:40:50:coordinates=231, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section overlay_opencl
+
+Overlay one video on top of another.
+
+It takes two inputs and has one output. The first input is the "main" video on which the second input is overlaid.
+This filter requires same memory layout for all the inputs. So, format conversion may be needed.
+
+The filter accepts the following options:
+
+@table @option
+
+@item x
+Set the x coordinate of the overlaid video on the main video.
+Default value is @code{0}.
+
+@item y
+Set the x coordinate of the overlaid video on the main video.
+Default value is @code{0}.
+
+@end table
+
+@subsection Examples
+
+@itemize
+@item
+Overlay an image LOGO at the top-left corner of the INPUT video. Both inputs are yuv420p format.
+@example
+-i INPUT -i LOGO -filter_complex "[0:v]hwupload[a], [1:v]format=yuv420p, hwupload[b], [a][b]overlay_opencl, hwdownload" OUTPUT
+@end example
+@item
+The inputs have same memory layout for color channels , the overlay has additional alpha plane, like INPUT is yuv420p, and the LOGO is yuva420p.
+@example
+-i INPUT -i LOGO -filter_complex "[0:v]hwupload[a], [1:v]format=yuva420p, hwupload[b], [a][b]overlay_opencl, hwdownload" OUTPUT
+@end example
+
+@end itemize
+
+@section prewitt_opencl
+
+Apply the Prewitt operator (@url{https://en.wikipedia.org/wiki/Prewitt_operator}) to input video stream.
+
+The filter accepts the following option:
+
+@table @option
+@item planes
+Set which planes to filter. Default value is @code{0xf}, by which all planes are processed.
+
+@item scale
+Set value which will be multiplied with filtered result.
+Range is @code{[0.0, 65535]} and default value is @code{1.0}.
+
+@item delta
+Set value which will be added to filtered result.
+Range is @code{[-65535, 65535]} and default value is @code{0.0}.
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply the Prewitt operator with scale set to 2 and delta set to 10.
+@example
+-i INPUT -vf "hwupload, prewitt_opencl=scale=2:delta=10, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section roberts_opencl
+Apply the Roberts cross operator (@url{https://en.wikipedia.org/wiki/Roberts_cross}) to input video stream.
+
+The filter accepts the following option:
+
+@table @option
+@item planes
+Set which planes to filter. Default value is @code{0xf}, by which all planes are processed.
+
+@item scale
+Set value which will be multiplied with filtered result.
+Range is @code{[0.0, 65535]} and default value is @code{1.0}.
+
+@item delta
+Set value which will be added to filtered result.
+Range is @code{[-65535, 65535]} and default value is @code{0.0}.
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply the Roberts cross operator with scale set to 2 and delta set to 10
+@example
+-i INPUT -vf "hwupload, roberts_opencl=scale=2:delta=10, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section sobel_opencl
+
+Apply the Sobel operator (@url{https://en.wikipedia.org/wiki/Sobel_operator}) to input video stream.
+
+The filter accepts the following option:
+
+@table @option
+@item planes
+Set which planes to filter. Default value is @code{0xf}, by which all planes are processed.
+
+@item scale
+Set value which will be multiplied with filtered result.
+Range is @code{[0.0, 65535]} and default value is @code{1.0}.
+
+@item delta
+Set value which will be added to filtered result.
+Range is @code{[-65535, 65535]} and default value is @code{0.0}.
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply sobel operator with scale set to 2 and delta set to 10
+@example
+-i INPUT -vf "hwupload, sobel_opencl=scale=2:delta=10, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@section tonemap_opencl
+
+Perform HDR(PQ/HLG) to SDR conversion with tone-mapping.
+
+It accepts the following parameters:
+
+@table @option
+@item tonemap
+Specify the tone-mapping operator to be used. Same as tonemap option in @ref{tonemap}.
+
+@item param
+Tune the tone mapping algorithm. same as param option in @ref{tonemap}.
+
+@item desat
+Apply desaturation for highlights that exceed this level of brightness. The
+higher the parameter, the more color information will be preserved. This
+setting helps prevent unnaturally blown-out colors for super-highlights, by
+(smoothly) turning into white instead. This makes images feel more natural,
+at the cost of reducing information about out-of-range colors.
+
+The default value is 0.5, and the algorithm here is a little different from
+the cpu version tonemap currently. A setting of 0.0 disables this option.
+
+@item threshold
+The tonemapping algorithm parameters is fine-tuned per each scene. And a threshold
+is used to detect whether the scene has changed or not. If the distance between
+the current frame average brightness and the current running average exceeds
+a threshold value, we would re-calculate scene average and peak brightness.
+The default value is 0.2.
+
+@item format
+Specify the output pixel format.
+
+Currently supported formats are:
+@table @var
+@item p010
+@item nv12
+@end table
+
+@item range, r
+Set the output color range.
+
+Possible values are:
+@table @var
+@item tv/mpeg
+@item pc/jpeg
+@end table
+
+Default is same as input.
+
+@item primaries, p
+Set the output color primaries.
+
+Possible values are:
+@table @var
+@item bt709
+@item bt2020
+@end table
+
+Default is same as input.
+
+@item transfer, t
+Set the output transfer characteristics.
+
+Possible values are:
+@table @var
+@item bt709
+@item bt2020
+@end table
+
+Default is bt709.
+
+@item matrix, m
+Set the output colorspace matrix.
+
+Possible value are:
+@table @var
+@item bt709
+@item bt2020
+@end table
+
+Default is same as input.
+
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Convert HDR(PQ/HLG) video to bt2020-transfer-characteristic p010 format using linear operator.
+@example
+-i INPUT -vf "format=p010,hwupload,tonemap_opencl=t=bt2020:tonemap=linear:format=p010,hwdownload,format=p010" OUTPUT
+@end example
+@end itemize
+
+@section unsharp_opencl
+
+Sharpen or blur the input video.
+
+It accepts the following parameters:
+
+@table @option
+@item luma_msize_x, lx
+Set the luma matrix horizontal size.
+Range is @code{[1, 23]} and default value is @code{5}.
+
+@item luma_msize_y, ly
+Set the luma matrix vertical size.
+Range is @code{[1, 23]} and default value is @code{5}.
+
+@item luma_amount, la
+Set the luma effect strength.
+Range is @code{[-10, 10]} and default value is @code{1.0}.
+
+Negative values will blur the input video, while positive values will
+sharpen it, a value of zero will disable the effect.
+
+@item chroma_msize_x, cx
+Set the chroma matrix horizontal size.
+Range is @code{[1, 23]} and default value is @code{5}.
+
+@item chroma_msize_y, cy
+Set the chroma matrix vertical size.
+Range is @code{[1, 23]} and default value is @code{5}.
+
+@item chroma_amount, ca
+Set the chroma effect strength.
+Range is @code{[-10, 10]} and default value is @code{0.0}.
+
+Negative values will blur the input video, while positive values will
+sharpen it, a value of zero will disable the effect.
+
+@end table
+
+All parameters are optional and default to the equivalent of the
+string '5:5:1.0:5:5:0.0'.
+
+@subsection Examples
+
+@itemize
+@item
+Apply strong luma sharpen effect:
+@example
+-i INPUT -vf "hwupload, unsharp_opencl=luma_msize_x=7:luma_msize_y=7:luma_amount=2.5, hwdownload" OUTPUT
+@end example
+
+@item
+Apply a strong blur of both luma and chroma parameters:
+@example
+-i INPUT -vf "hwupload, unsharp_opencl=7:7:-2:7:7:-2, hwdownload" OUTPUT
+@end example
+@end itemize
+
+@c man end OPENCL VIDEO FILTERS
+
@chapter Video Sources
@c man begin VIDEO SOURCES
It shall assume one of following values:
@table @option
@item iteration_count
-Set iteration cound mode.
+Set iteration count mode.
@item normalized_iteration_count
set normalized iteration count mode.
@end table
@item acount
Set how much frames to accumulate in histogram.
-Defauls is 1. Setting this to -1 accumulates all frames.
+Default is 1. Setting this to -1 accumulates all frames.
@item rheight
Set histogram ratio of window height.
each channel is displayed using the magma color scheme
@item green
each channel is displayed using the green color scheme
+@item viridis
+each channel is displayed using the viridis color scheme
+@item plasma
+each channel is displayed using the plasma color scheme
+@item cividis
+each channel is displayed using the cividis color scheme
+@item terrain
+each channel is displayed using the terrain color scheme
@end table
Default value is @samp{channel}.
each channel is displayed using the magma color scheme
@item green
each channel is displayed using the green color scheme
+@item viridis
+each channel is displayed using the viridis color scheme
+@item plasma
+each channel is displayed using the plasma color scheme
+@item cividis
+each channel is displayed using the cividis color scheme
+@item terrain
+each channel is displayed using the terrain color scheme
@end table
Default value is @samp{intensity}.
filter outputs, but can synthesize sound from other spectrograms too.
But in such case results are going to be poor if the phase data is not
available, because in such cases phase data need to be recreated, usually
-its just recreated from random noise.
+it's just recreated from random noise.
For best results use gray only output (@code{channel} color mode in
@ref{showspectrum} filter) and @code{log} scale for magnitude video and
@code{lin} scale for phase video. To produce phase, for 2nd video, use
projects / ffmpeg / blobdiff