cat-broadcast.sh

#!/bin/bash

BROADCAST_ID="$(pw-dump | jq '.[]|select(.info.props["node.name"] == "broadcast")|.id')"
pw-record --target="$BROADCAST_ID" --rate=44100 -

stream.liquidsoap

broadcast = input.external.rawaudio(
  id="broadcast",
  restart=true,
  restart_on_error=true,
  buffer=0.2,
  max=5.0,
  "/usr/local/bin/cat-broadcast.sh"
)

output.icecast(
  %flac,
  host="localhost",
  port=8000,
  password="",
  mount="ng.flac",
  mksafe(broadcast)  # mksafe() adds a implicit fallback to blank() to fallible sources
)

output.icecast(
  %opus,
  host="localhost",
  port=8000,
  password="",
  mount="ng.opus",
  mksafe(broadcast)
)

output.icecast(
  %vorbis,
  host="localhost",
  port=8000,
  password="",
  mount="ng.ogg",
  mksafe(broadcast)
)

output.icecast(
  %mp3,
  host="localhost",
  port=8000,
  password="",
  mount="ng.mp3",
  mksafe(broadcast)
)