[FFmpeg-cvslog] doc/filters: add one lowpass filter example

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Apr 29 11:44:21 2017 +0200| [b8b0cece794d8338ec79833c55e77d53888f800f] | committer: Paul B Mahol

doc/filters: add one lowpass filter example

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b8b0cece794d8338ec79833c55e77d53888f800f
---

 doc/filters.texi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/doc/filters.texi b/doc/filters.texi
index 2fe7ff7b8c..d49fec1264 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3002,6 +3002,15 @@ The default is 0.707q and gives a Butterworth response.
 Specify which channels to filter, by default all available are filtered.
 @end table
 
+ at subsection Examples
+ at itemize
+ at item
+Lowpass only LFE channel, it LFE is not present it does nothing:
+ at example
+lowpass=c=LFE
+ at end example
+ at end itemize
+
 @anchor{pan}
 @section pan