From 442e2b0d88235dd1170691f8d8c21c3b8f7ab439 Mon Sep 17 00:00:00 2001
From: gutmet <me.git@gutmet.org>
Date: Wed, 17 Feb 2021 10:20:11 +0100
Subject: [PATCH] script for delaying audio in a video

---
 delayaudio | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 delayaudio

diff --git a/delayaudio b/delayaudio
new file mode 100755
index 0000000..294ef31
--- /dev/null
+++ b/delayaudio
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# delay the audio by using the same video file as two inputs
+# for ffmpeg, one offset by $1 seconds. Take the video of the
+# first, the audio of the offset one. Negative offsets are ok.
+
+set -eu
+
+if [ "$#" -ne 2 ]; then
+  echo "USAGE: $0 DELAY FILE"
+  exit 1
+fi
+
+fullpath="$2"
+source fileextensions
+
+cd "$dir"
+ffmpeg -i "$filename.$extension" -itsoffset "$1" -i "$filename.$extension" -map 0:v -map 1:a -c copy "$filename""_delayed.$extension"