ffstream.sh

#!/usr/bin/env bash

[[ -z "$PORT" ]] && PORT=18181
[[ -z "$SAMPLING" ]] && SAMPLING=44100

help() {
	printf 'Usage: ffstream %s\n' 'receive' 'send <address>'
}

operator=$1
shift
case "$operator" in
send)
	address=$1
	shift
	[[ $# -gt 0 ]] && echo "Unused arguments: $@" >&2
	if [[ -z "$address" ]]; then
		echo "Destination address is required" >&2
		exit 1
	fi
	exec ffmpeg \
		-f pulse \
		-i remote.monitor \
		-ac 2 \
		-acodec pcm_u8 \
		-ar "$SAMPLING" \
		-f u8 \
		"udp://$address:$PORT"
	;;
receive)
	[[ $# -gt 0 ]] && echo "Unused arguments: $@" >&2
	exec ffplay \
		-nodisp \
		-acodec pcm_u8 \
		-ar "$((SAMPLING * 2))" \
		-analyzeduration 0 \
		-probesize 32 \
		-f u8 \
		-fflags nobuffer \
		-fflags discardcorrupt \
		-framedrop \
		-strict experimental \
		-sync ext \
		"udp://0.0.0.0:$PORT" #?listen=1
	;;
*)
	help
	exit 1
	;;
esac