From 45d32dff7ddc4611faa79d0d72c8ac4c0d967480 Mon Sep 17 00:00:00 2001
From: Nemo <me@captnemo.in>
Date: Mon, 26 Oct 2020 23:22:24 +0530
Subject: [PATCH] Keep stuff in README

---
 README.md        |  1 +
 split-by-silence | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100755 split-by-silence

diff --git a/README.md b/README.md
index 3bd271e..4385931 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,7 @@ This lives in my `~/projects/scripts` directory and is added to my `$PATH`. Not
 | plutil.pl               | implementation of binary/UTF-8 (text) XML conversion of plist files                                                                                                                 |
 | port_block_check.sh     | Run this behind a firewall to see if there are any outbound ports that are blocked                                                                                                  |
 | prettyping              | Third-party, runs a nice graphical ping                                                                                                                                             |
+| pulse-recorder.py       | Records a [pulse audio stream easily](https://gist.github.com/ramast/c47bd5e57586e9c2deb74975e27089f0/).
 | resty                   | Third-party. A tiny command line REST interface for bash and zsh.                                                                                                                   |
 | reverse_video.sh        | Reverse a video                                                                                                                                                                     |
 | rip-git.pl              | Third-party. Brute force and download a publicly exposed .git directory                                                                                                             |
diff --git a/split-by-silence b/split-by-silence
new file mode 100755
index 0000000..c444508
--- /dev/null
+++ b/split-by-silence
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Source: https://gist.github.com/vi/2fe3eb63383fcfdad7483ac7c97e9deb
+
+IN=$1
+OUT=$2
+
+true ${SD_PARAMS:="-55dB:d=0.3"};
+true ${MIN_FRAGMENT_DURATION:="20"};
+export MIN_FRAGMENT_DURATION
+
+if [ -z "$OUT" ]; then
+    echo "Usage: split_by_silence.sh input_media.mp4 output_template_%03d.mkv"
+    echo "Depends on FFmpeg, Bash, Awk, Perl 5. Not tested on Mac or Windows."
+    echo ""
+    echo "Environment variables (with their current values):"
+    echo "    SD_PARAMS=$SD_PARAMS       Parameters for FFmpeg's silencedetect filter: noise tolerance and minimal silence duration"
+    echo "    MIN_FRAGMENT_DURATION=$MIN_FRAGMENT_DURATION    Minimal fragment duration"
+    exit 1
+fi
+
+echo "Determining split points..." >& 2
+
+SPLITS=$(
+    ffmpeg  -v warning -i "$IN" -af silencedetect,ametadata=mode=print:file=-:key=lavfi.silence_start -vn -sn  -f s16le  -y /dev/null \
+    | grep lavfi.silence_start= \
+    | cut -f 2-2 -d= \
+    | perl -ne '
+        our $prev;
+        INIT { $prev = 0.0; }
+        chomp;
+        if (($_ - $prev) >= $ENV{MIN_FRAGMENT_DURATION}) {
+            print "$_,";
+            $prev = $_;
+        }
+    ' \
+    | sed 's!,$!!'
+)
+
+
+echo "Splitting points are $SPLITS"
+
+ffmpeg -v warning -i "$IN" -c copy -map 0 -f segment -segment_times "$SPLITS" "$OUT"
\ No newline at end of file