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-rw-r--r--doc/filters.texi9
1 files changed, 8 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index cc192d634f..73f1b03128 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -12609,13 +12609,20 @@ Default value is @code{0}.
@item tolerance
Set the range of luma values to be keyed out.
-Default value is @code{0}.
+Default value is @code{0.01}.
@item softness
Set the range of softness. Default value is @code{0}.
Use this to control gradual transition from zero to full transparency.
@end table
+@subsection Commands
+This filter supports same @ref{commands} as options.
+The command accepts the same syntax of the corresponding option.
+
+If the specified expression is not valid, it is kept at its current
+value.
+
@section lut, lutrgb, lutyuv
Compute a look-up table for binding each pixel component input value