Automatic switch to live-stream with liquidsoap

live.liq

#!/usr/bin/liquidsoap

# Music
myplaylist = playlist("<path_to_playlist>/playlist.m3u")

# If something goes wrong, we'll play this
security = single("<path_to_fallback>/fallback-loop.mp3")

# optional speech generator
livesoon =  single("say:We are live soon!")

# Build feed by rotating playlist and speech 
radio = rotate(weights=[1,1],[ myplaylist, livesoon ])

# amplify to match live volume level
radio = amplify(0.1,override="replay_gain",radio)

# And finally build stream, which switches to live stream, if there is any signal
finalradio = fallback(track_sensitive = false, [input.http("<url_to_icecast_live>"), radio, security])

# Stream this to icecast
output.icecast(%mp3(bitrate=96),
    host = "<icecast_server>",
    port = <port>,
    password = "<source_password>",
    mount = "<mount_point>",
    url = "<metadata_url>",
    name = "<metadata_name>",
    description = "<metadata_description>",
    genre = "<metadata_genre>",
    finalradio)