View source for User:Andre Castro/prototyping/1.2/liquidsoap-noites

=Liquid Soap=

http://savonet.sourceforge.net/doc-1.0.0/quick_start.html

Liquidsoap is a programming language for describing multimedia streaming systems


==Sources==
A stream is built with Liquidsoap by using or creating sources.
A source is an annotated audio stream.
In a Liquidsoap script, you build source objects


==Possible Liquid Soap Setups==

===Request information on a file===
<source lang="text">
liquidsoap -r http://www.archive.org/download/moonstone_0802_librivox/moonstone_01_collins.ogg

Request resolved.
title="01 - First Period: Chapter I"
temporary="true"
decoder="OGG"
artist="Wilkie Collins"
kind="{audio=0+;video=0+;midi=0+}"
rid="0"
initial_uri="http://www.archive.org/download/moonstone_0802_librivox/moonstone_01_collins.ogg"
status="ready"
filename="/tmp/liq452673.ogg"
album="The Moonstone"
Computing duration: 384.86 sec.


</source>

===Playlists===
LS can play playlists in both .pls and .M3U formats

it can play both local and remote files

====.pls playlist====

liquidsoap 'out(playlist("playlist.pls"))

<source lang="text">
[playlist]
numberofentries=2
Title1=File1 - archiveORg
File1=/home/andre/Documents/PZI/prototyping/blind-archive/sf-archive_frech/03actuel.ogg

Title2=File2 - archiveORG2
File2=/home/andre/Documents/PZI/prototyping/blind-archive/sf-archive_frech/04comporte.ogg
</source>

===Playing mono files===
liquidsoap is set to stereo, so does not play mono files!

So what needs to be done is converting the mono into stereo
Weĺl do through this .liq script:

<source lang="text">
#!/usr/bin/liquidsoap

mono_playlist = playlist("/home/andre/Documents/PZI/prototyping/blind-archive/liquidsoap/playlist-blind-remote-mono.pls")

mono_playlist_s = audio_to_stereo(mono_playlist)

out(mono_playlist_s)

</source>



===SWITCHING PLAYLISTS===

* liquidsoap script that schedules when playlists are to be played (can also allow for mixer jingles, time information, at precise or random intervals)

* a schedule can be drawn (look at radios timetables!)



( liquid-test-severalPL.liq )

<source lang="text">

#!/usr/bin/liquidsoap

#based on example: http://savonet.sourceforge.net/doc-1.0.0/complete_case.html

set("log.stdout", true) # Print log messages to the console

p_code = playlist("/home/andre/Documents/PZI/prototyping/blind-archive/liquidsoap/playlist_code.pls")
p_cooking = playlist("/home/andre/Documents/PZI/prototyping/blind-archive/liquidsoap/playlist_cooking.pls")
p_french = playlist("/home/andre/Documents/PZI/prototyping/blind-archive/liquidsoap/playlist_french.pls")
p_news = playlist("/home/andre/Documents/PZI/prototyping/blind-archive/liquidsoap/playlist_news.pls")
 
radio = fallback([ request.queue(id="request"), 
	switch([
		({ 0m-5m }, p_code), ({ 5m-10m }, p_cooking),  ({ 10m-15m }, p_french),  ({ 20m-25m }, p_news) ])  
	])
# switch to given playlis within the minuts estipulated. 
# to switch a unique time: 8h0m0s-8h40m30s  

out(audio_to_stereo((radio:source(*+1,0,0))))
</source>

===Future===
Make LS	display	metadata of the	file on	the stream!