avfilter/af_dynaudnorm: implement threshold option

1 files changed, 8 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index ba00989987..b5f136d79b 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3438,6 +3438,14 @@ value. Instead, the threshold value will be adjusted for each individual
 frame.
 In general, smaller parameters result in stronger compression, and vice versa.
 Values below 3.0 are not recommended, because audible distortion may appear.
+
+@item threshold, t
+Set the target threshold value. This specifies the loweset permissible
+magnitude level for the audio input which will be normalized.
+If input frame volume is above this value frame will be normalized.
+Otherwise frame may not be normalized at all. The default value is set
+to 0, which means all input frames will be normalized.
+This option is mostly useful if digital noise is not wanted to be amplified.
 @end table
 
 @section earwax