From b6ab34fc98a4f839a505d3410b87a40286ed2ccc Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Tue, 10 Feb 2015 23:50:17 +0100
Subject: af_rubberband: pitch correction with librubberband

If "--af=rubberband" is used, librubberband will be used to speed up or
slow down audio with pitch correction.

This still has some problems: the audio delay is not calculated
correctly, so the audio position jitters around by a few milliseconds.
This will probably ruin video timing.
---
 DOCS/man/af.rst | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'DOCS/man/af.rst')

diff --git a/DOCS/man/af.rst b/DOCS/man/af.rst
index 6983041bef..ffb6c03e98 100644
--- a/DOCS/man/af.rst
+++ b/DOCS/man/af.rst
@@ -600,6 +600,11 @@ Available filters are:
             Changing playback speed would change pitch, leaving audio tempo at
             1.2x.
 
+``rubberband``
+    High quality pitch correction with librubberband. This can be used in place
+    of ``scaletempo``, and will be used to adjust audio pitch when playing
+    at speed different from normal.
+
 ``lavfi=graph``
     Filter audio using FFmpeg's libavfilter.
 
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