bundles/voc-loudness-monitor: inital commit of sources units

bundles/voc-loudness-monitor/files/loudness.service

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+[Unit]
+Description=Loudness Monitor for ${url}
+After=syslog.target
+After=network.target
+
+[Service]
+RestartSec=30s
+Type=simple
+User=voc
+Group=voc
+WorkingDirectory=/opt/voc-loudness-monitor/
+ExecStart=/opt/voc-loudness-monitor/loudness_${id}.sh
+Restart=always
+StartLimitInterval=0
+
+[Install]
+WantedBy=multi-user.target

bundles/voc-loudness-monitor/files/loudness.sh

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+#!/bin/bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+ffmpeg \
+        -y \
+        -hide_banner \
+        -nostdin \
+        -re \
+        -loglevel warning \
+        -timeout 5 \
+        -i ${url} \
+        -filter_complex "[0:v] scale=w=640:h=360, fps=25 [scaled];
+            [0:a] ebur128=video=1:target=-16:gauge=shortterm:scale=relative:size=640x480[ebur][a1];
+            [ebur] fps=25 [v1];
+            [v1][scaled] vstack=inputs=2 [out];
+            [a1] anullsink" \
+        -map "[out]" \
+            -c:v mpeg2video \
+            -pix_fmt yuv420p \
+            -q:v 2 \
+            -keyint_min 0 \
+        -an \
+        -f rtp rtp://127.0.0.1:${port}