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
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
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{16}.
-Allowed range is from @var{16} to @var{65536}.
+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{65536}.
-Allowed range is from @var{16} to @var{65536}.
-Lower values decreases latency at cost of higher CPU usage.
+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
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.
projects / ffmpeg / blobdiff