From 7773dac89ebad85269ba36cafcf508eaa68e2c1d Mon Sep 17 00:00:00 2001
From: root <root@maxiluv.fritz.box>
Date: Sat, 20 Nov 2021 00:03:45 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20initial=20commit?=
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---
 silence-report.py | 53 +++++++++++++++++++++++++++++++++++++++++++++++
 silence.sh        |  9 ++++++++
 2 files changed, 62 insertions(+)
 create mode 100755 silence-report.py
 create mode 100755 silence.sh

diff --git a/silence-report.py b/silence-report.py
new file mode 100755
index 0000000..428b345
--- /dev/null
+++ b/silence-report.py
@@ -0,0 +1,53 @@
+#!/usr/bin/python3
+import os
+import glob
+import re
+from datetime import datetime, timedelta
+from pytimeparse.timeparse import timeparse
+
+
+silences = []
+
+os.chdir("/srv/recording/silence")
+for s in glob.glob("*.txt"):
+    with open(s, 'r') as f:
+        t = f.read()
+
+    # parse start time from the filename
+    start_of_flac = datetime.strptime(s, "%Y-%m-%d_%H-%M-%S.flac.txt")
+
+
+    # flacs are not necessarily 1 hour long, but ffmpeg thankfully also writes
+    # out some timestamps, so we use the last one to determine the length
+    length_of_flac = None
+    for l in t.split("\n"):
+        m = re.match(r"size=.* time=([0-9:.]+) .*", l)
+        if m:
+            length_of_flac = timeparse(m.group(1))
+
+    silence_start = None
+    for l in t.split("\n"):
+        m = re.search(r"silence_start: ([-0-9.]+)", l)
+        if m:
+            silence_start = float(m.group(1))
+            silence_end = length_of_flac  # fallback
+        m = re.search(r"silence_end: ([-0-9.]+)", l)
+        if m:
+            silence_end = float(m.group(1))
+            silences.append((start_of_flac + timedelta(seconds=silence_start), start_of_flac + timedelta(seconds=silence_end)))
+
+            # reset
+            silence_start = None
+            silence_end = length_of_flac
+
+    # if there is no "end of silence", ffmpeg does not report it
+    if silence_start:
+        silences.append((start_of_flac + timedelta(seconds=silence_start), start_of_flac + timedelta(seconds=silence_end)))
+
+silences = sorted(silences)
+
+
+FORMAT="%Y-%m-%d %H:%M:%S"
+for silence_start, silence_end in silences:
+    duration = silence_end - silence_start
+    print("%s;%s;%d" % (silence_start.strftime(FORMAT), silence_end.strftime(FORMAT), round(duration.total_seconds())))
diff --git a/silence.sh b/silence.sh
new file mode 100755
index 0000000..ac08399
--- /dev/null
+++ b/silence.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+cd /srv/recording
+
+find -name "*.flac" -mmin +1 | while read f; do
+  if ! test -e silence/"$f".txt; then
+    echo "$f"
+    nice -n19 ffmpeg -hide_banner  -i $f -af silencedetect=duration=30 -f null - 2>&1 </dev/null | sed 's/\r/\n/g' >silence/"$f".txt
+  fi
+done