My Liquidsoap (1.1.1) has gotten dead air between songs since I changed its
config recently to include a new switch/harbor setting to have DJs pause
the request queue and talk.
The goal of the config: What I need is to pause my dynamic request from
queuing the next song based on an interactive server variable. (set through
a web interface for DJs) When the dynamic request is not going forward, I
need blank/dead air to play so that the DJ can connect to my harbor and
talk. When the DJ is about to finish talking he can hit a button on the
web interface and Liq should start playing music from the dynamic queue
again.
Here is what I came up with:
======================
#!/usr/bin/liquidsoap
set("log.level", 3)
r4_offline_file = "/home/icecast/~misc/cover-offline.mp3"
r4_sid = "3"
r4_dest_mount = "covers"
r4_dest_desc = "Rainwave Covers"
r4_dest_url = "http://covers.rainwave.cc";
r4_harbor_port = 8023
set("server.socket", true)
set("server.socket.path","/var/run/liquidsoap/<script>.sock")
set("server.socket.permissions",432)
set("server.timeout",-1.)
r4_paused = interactive.bool("paused", false)
r4_harbor_pw = interactive.string("harbor_pw", "no_password_at_all")
def r4_backend() =
result = get_process_output("/opt/rainwave/rw_get_next.py --sid
"^r4_sid)
request.create(result)
end
def r4_live_auth(user, password) =
if password == r4_harbor_pw() then
true
else
false
end
end
def r4_is_paused() =
r4_paused
end
r4_offline = audio_to_stereo(single(r4_offline_file))
r4_silence = rewrite_metadata([("title", r4_dest_desc)],
audio_to_stereo(single("/home/icecast/silence_5min.mp3")))
r4_auto = request.dynamic(r4_backend, length=12.0, conservative=false,
timeout=20.0)
r4_auto = rewrite_metadata([("title", '$(if $(use_suffix),"$(title)
$(suffix)","$(title)")'), ("url", r4_dest_url)], r4_auto)
r4_auto = amplify(0.8, override="replay_gain", audio_to_stereo(r4_auto))
r4_auto = fallback([r4_auto, r4_offline], track_sensitive=false)
r4_auto = switch([ (r4_is_paused(), r4_silence), ({ true }, r4_auto) ],
track_sensitive=true)
r4_auto = smart_crossfade(r4_auto)
r4_live = input.harbor("/", port=r4_harbor_port, auth=r4_live_auth,
icy=true);
r4_livemix = smooth_add(delay=0.5, p=0.2, normal=r4_auto, special=r4_live)
# outputs removed
=======================
The interface will use output.skip() to force the 'pause' status to end.
My log looks like:
=======================
2015/02/20 01:41:13 [request.dynamic_4835:4] Remaining: 11.2s, queued:
0.0s, adding: 30.0s (RID 5)
2015/02/20 01:41:25 [decoder:4] Decoding "[[ song 1 ]]" ended:
Mad.End_of_stream.
2015/02/20 01:41:25 [request.dynamic_4835:3] Finished with "[[ song 1 ]]".
2015/02/20 01:41:25 [amplify_4840:3] End of the current overriding.
2015/02/20 01:41:25 [request.dynamic_4835:4] Remaining: 0.0s, queued:
30.0s, taking: 30.0s
2015/02/20 01:41:25 [request.dynamic_4835:3] Prepared "[[ song 2 ]]" (RID
5).
2015/02/20 01:41:25 [amplify_4840:3] Overriding amplification: 0.364754.
2015/02/20 01:41:25 [ogg.muxer:4] covers(dot)ogg: Setting end of track
9922787.
2015/02/20 01:41:25 [ogg.muxer:4] covers(dot)ogg: Every ogg logical tracks
have ended: setting end of stream.
2015/02/20 01:41:25 [ogg.muxer:4] covers(dot)ogg: Starting new
sequentialized ogg stream.
2015/02/20 01:41:25 [ogg.muxer:4] covers(dot)ogg: Starting all streams
2015/02/20 01:44:28 [decoder:4] Trying method "META".....
[[ snip "trying method" a lot ]]
2015/02/20 01:44:28 [request.dynamic_4835:4] Remaining: 11.8s, queued:
0.0s, adding: 30.0s (RID 6)
2015/02/20 01:44:40 [decoder:4] Decoding "[[ song 2 ]]" ended:
Mad.End_of_stream.
2015/02/20 01:44:40 [request.dynamic_4835:3] Finished with "[[ song 2 ]]".
2015/02/20 01:44:40 [amplify_4840:3] End of the current overriding.
2015/02/20 01:44:40 [request.dynamic_4835:4] Remaining: 0.0s, queued:
30.0s, taking: 30.0s
2015/02/20 01:44:40 [request.dynamic_4835:3] Prepared "[[ song 3 ]]" (RID
6).
2015/02/20 01:44:40 [amplify_4840:3] Overriding amplification: 0.461318.
2015/02/20 01:44:40 [ogg.muxer:4] covers(dot)ogg: Setting end of track
b0145a7.
2015/02/20 01:44:40 [ogg.muxer:4] covers(dot)ogg: Every ogg logical tracks
have ended: setting end of stream.
2015/02/20 01:44:40 [ogg.muxer:4] covers(dot)ogg: Starting new
sequentialized ogg stream.
2015/02/20 01:44:40 [ogg.muxer:4] covers(dot)ogg: Starting all streams
=======================
The audio stream:
http://coverstream.rainwave.cc:8000/covers.ogg
=======================
Problem #1: Stuttering
Very frequently at the end of songs, it will stutter. I think this is the
ogg muxer problems seen above. Changing the length=x value does not change
anything.
Problem #2: Dead air
Frequently there are 5+ seconds of silence at the end of a song.
Increasing the length=x parameter doesn't change anything, neither
decreasing nor increasing dead air.
Problem #3: crossfade stopped working
Any ideas? I'm clearly trying to do something strange here with the config.
- Rob
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