From 48b5be65aedbc4ae12b3a0c32ed5d86a12dd039a Mon Sep 17 00:00:00 2001 From: Arwa Arif Date: Tue, 24 Feb 2015 12:17:30 +0530 Subject: avfilter: Add FFT domain filter. Signed-off-by: Michael Niedermayer --- doc/filters.texi | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'doc') diff --git a/doc/filters.texi b/doc/filters.texi index 0c72145d80..b15087c0e1 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4591,6 +4591,44 @@ fade=t=in:st=5.5:d=0.5 @end itemize +@section fftfilt +Apply arbitrary expressions to samples in frequency domain + +@table @option +@item dc_Y +Adjust the dc value (gain) of the luma plane of the image. The filter +accepts an integer value in range @code{0} to @code{1000}. The default +value is set to @code{0}. + +@item dc_U +Adjust the dc value (gain) of the 1st chroma plane of the image. The +filter accepts an integer value in range @code{0} to @code{1000}. The +default value is set to @code{0}. + +@item dc_V +Adjust the dc value (gain) of the 2nd chroma plane of the image. The +filter accepts an integer value in range @code{0} to @code{1000}. The +default value is set to @code{0}. + +@item weight_Y +Set the frequency domain weight expression for the luma plane. + +@item weight_U +Set the frequency domain weight expression for the 1st chroma plane. + +@item weight_V +Set the frequency domain weight expression for the 2nd chroma plane. + +The filter accepts the following variables: +@item X +@item Y +The coordinates of the current sample. + +@item W +@item H +The width and height of the image. +@end table + @section field Extract a single field from an interlaced image using stride -- cgit v1.2.3