avfilter: add fftdnoiz filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 33e27e10f3..afa3984447 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8696,6 +8696,40 @@ fftfilt=dc_Y=0:weight_Y='exp(-4 * ((Y+X)/(W+H)))'
 
 @end itemize
 
+@section fftdnoiz
+Denoise frames using 3D FFT (frequency domain filtering).
+
+The filter accepts the following options:
+
+@table @option
+@item sigma
+Set the noise sigma constant. This sets denoising strength.
+Default value is 1. Allowed range is from 0 to 30.
+Using very high sigma with low overlap may give blocking artifacts.
+
+@item amount
+Set amount of denoising. By default all detected noise is reduced.
+Default value is 1. Allowed range is from 0 to 1.
+
+@item block
+Set size of block, Default is 4, can be 3, 4, 5 or 6.
+Actual size of block in pixels is 2 to power of @var{block}, so by default
+block size in pixels is 2^4 which is 16.
+
+@item overlap
+Set block overlap. Default is 0.5. Allowed range is from 0.2 to 0.8.
+
+@item prev
+Set number of previous frames to use for denoising. By default is set to 0.
+
+@item next
+Set number of next frames to to use for denoising. By default is set to 0.
+
+@item planes
+Set planes which will be filtered, by default are all available filtered
+except alpha.
+@end table
+
 @section field
 
 Extract a single field from an interlaced image using stride