From c7c4b8308b70c6f3fb5b464bf3038d7290d80e92 Mon Sep 17 00:00:00 2001
From: Andreas Fankhauser hiddenalpha.ch
Date: Sat, 20 Apr 2024 01:56:55 +0200
Subject: Add ffmpeg filter to fix some loudness war.

---
 doc/note/ffmpeg/ffmpeg.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/doc/note/ffmpeg/ffmpeg.txt b/doc/note/ffmpeg/ffmpeg.txt
index 2b18a44..c992537 100644
--- a/doc/note/ffmpeg/ffmpeg.txt
+++ b/doc/note/ffmpeg/ffmpeg.txt
@@ -32,6 +32,18 @@ Use  -codec:v copy  to keep video, or -codec:v no  for audio-only.
   -filter:a lowpass=f=16000
 
 
+## Fix Loudness war, bring bass back
+
+  -af "equalizer=f=200:w=200:t=h:g=-9,equalizer=f=400:w=600:t=h:g=-9,equalizer=f=2000:w=2000:t=h:g=-12,equalizer=f=4000:w=4000:t=h:g=-12,equalizer=f=10000:w=10000:t=h:g=-12,volume=+0.0dB"
+
+
+## Audio trim
+
+HINT: Repeat afade twice for log.
+
+  -af "afade=t=in:d=500ms,afade=t=out:st=183427ms:d=500ms" \
+
+
 ## Record Desktop
 
   ffmpeg -f gdigrab -framerate 6 -probesize 10M -offset_x 0 -offset_y 0 \
-- 
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