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
@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
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.
+@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
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
@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 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.
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}.
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 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}.
projects / ffmpeg / blobdiff