README.md

Bash scripts for broadcasting an HLS audio stream, either from files or your desktop output. Uses ffmpeg, http.server from Python and a tunnel from cloudflared. stream_file.sh requires the path to a file or directory as an argument, stream_loopback.sh needs the input device to be specified in the variable at line 4. Make sure to fill up TUNNEL_UUID (line 7) in either script, in case you want to use tunneling.

stream_file.sh

#!/bin/bash

# constants
INPUT_PATH="$1"
OUTPUT_PATH="/tmp/stream"

TUNNEL_UUID=""

SERVER_ADDRESS="localhost"
SERVER_PORT="8080"

# create the output directory
mkdir -p "$OUTPUT_PATH"

# start the server and the tunnel
python -m http.server $SERVER_PORT \
    --bind $SERVER_ADDRESS \
    --directory "$OUTPUT_PATH" &

cloudflared tunnel --loglevel warn run \
    --url http://$SERVER_ADDRESS:$SERVER_PORT \
    --credentials-file ~/.cloudflared/$TUNNEL_UUID.json \
    --protocol http2 \
    $TUNNEL_UUID &

# start the stream
if [ -d "$INPUT_PATH" ]; then
    shopt -s nullglob nocaseglob

    ffmpeg -threads 0 -re -stream_loop -1 \
        -f concat -safe 0 -i <(printf "file %q\n" "$INPUT_PATH"/*.{wav,flac,mp3,m4a,ogg} | sort -Vk1) -map 0:a \
        -c:a aac -b:a 160k -ac 2 \
        -f hls -hls_list_size 10 -hls_time 3 -hls_flags delete_segments "$OUTPUT_PATH"/stream.m3u8

    shopt -u nullglob nocaseglob
else
    ffmpeg -threads 0 -re -stream_loop -1 \
        -i "$INPUT_PATH" -map 0:a \
        -c:a aac -b:a 160k -ac 2 \
        -f hls -hls_list_size 10 -hls_time 3 -hls_flags delete_segments "$OUTPUT_PATH"/stream.m3u8
fi

# kill the server and the tunnel
pkill -f python
pkill -f cloudflared

# remove the output directory
rm -rf "$OUTPUT_PATH"

stream_loopback.sh

#!/bin/bash

# constants
INPUT_DEVICE="alsa_output.pci-0000_00_1f.3.analog-stereo.monitor"
OUTPUT_PATH="/tmp/stream"

TUNNEL_UUID=""

SERVER_ADDRESS="localhost"
SERVER_PORT="8080"

# create the output directory
mkdir -p "$OUTPUT_PATH"

# start the server and the tunnel
python -m http.server $SERVER_PORT \
    --bind $SERVER_ADDRESS \
    --directory "$OUTPUT_PATH" &

cloudflared tunnel --loglevel warn run \
    --url http://$SERVER_ADDRESS:$SERVER_PORT \
    --credentials-file ~/.cloudflared/$TUNNEL_UUID.json \
    --protocol http2 \
    $TUNNEL_UUID &

# start the stream
ffmpeg -threads 0 -re \
    -f pulse -i $INPUT_DEVICE \
    -c:a aac -b:a 160k -ac 2 \
    -f hls -hls_list_size 10 -hls_time 3 -hls_flags delete_segments "$OUTPUT_PATH"/stream.m3u8

# kill the server and the tunnel
pkill -f python
pkill -f cloudflared

# remove the output directory
rm -rf "$OUTPUT_PATH"