[FFmpeg-cvslog] doc/filters: add some afftdn examples

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Thu Mar 17 10:18:08 2022 +0100| [242c07982ad523b2e0f928a204a6f2d293a956d7] | committer: Paul B Mahol

doc/filters: add some afftdn examples

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=242c07982ad523b2e0f928a204a6f2d293a956d7
---

 doc/filters.texi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/doc/filters.texi b/doc/filters.texi
index f25c5c1640..d70ac3e237 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1396,6 +1396,30 @@ Default value is @code{none}.
 
 This filter supports the some above mentioned options as @ref{commands}.
 
+ at subsection Examples
+
+ at itemize
+ at item
+Reduce white noise by 10dB, and use previously measured noise floor of -40dB:
+ at example
+afftdn=nr=10:nf=-40
+ at end example
+
+ at item
+Reduce white noise by 10dB, also set initial noise floor to -80dB and enable automatic
+tracking of noise floor so noise floor will gradually change during processing:
+ at example
+afftdn=nr=10:nf=-80:tn=1
+ at end example
+
+ at item
+Reduce noise by 20dB, using noise floor of -40dB and using commands to take noise profile
+of first 0.4 seconds of input audio:
+ at example
+asendcmd=0.0 afftdn sn start,asendcmd=0.4 afftdn sn stop,afftdn=nr=20:nf=-40
+ at end example
+ at end itemize
+
 @section afftfilt
 Apply arbitrary expressions to samples in frequency domain.