From 4184f8585d02fa3b144e010be603c8814682fcea Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 1 Mar 2018 21:09:33 +0100
Subject: DOCS/interface-changes: add note about desyncing audio filters

For example af_loudnorm is a known filter with this behavior.
---
 DOCS/interface-changes.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/DOCS/interface-changes.rst b/DOCS/interface-changes.rst
index 5830b413e0..cfe58036db 100644
--- a/DOCS/interface-changes.rst
+++ b/DOCS/interface-changes.rst
@@ -64,6 +64,8 @@ Interface changes
         - using "strong" gapless audio (--gapless-audio=yes) can fail if the
           audio formats are not convertible (such as switching between PCM and
           AC3 passthrough)
+        - if filters do not pass through PTS values correctly, A/V sync can
+          result over time
     - remove out-format sub-parameter from "format" audio filter (no replacement)
     - --lavfi-complex now requires uniquely named filter pads. In addition,
       unconnected filter pads are not allowed anymore (that means every filter
-- 
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