Radio Calafou

Radio Calafou ?

A FM and stream radio based in Calafou that broadcast very locally on 107 Mhz and on http://essun.calafou.org:8000/radiocalafou.ogg (you can't listen to it from outside calafou, local network)

Global set-up

The PiBox read the stream that comes from Libretime and play it to the transmitter

• To Libretime : http://radio.calafou.org user : calafou pwd : calafou o (admin / admin)
• To Icecast : http://radio.calafou.org:8000 user : source pwd : hackme
• To the PiBox : http://172.31.17.98 user : pibox pwd : pnodeaccesspass - ssh pi@h172.31.17.98 pwd : raspberry
• To listen audio stream : http://radio.calafou.org:8000/radiocalafou.ogg

What can we do with it ?

Libretime

https://libretime.org/guides Threw Media Builder

• Possible to add any type of audio file, the library already include all the files that are stored in ftp://omnius.calafou/MEDIATECA/0_audio/music/ and create a playlist
• Possible to create a smart playlist that randomly include files from the library in function of criterias (genre, album name, langage, BPM, last played, year, ...)
• Possible to create a webstream program from any type of stream (.mp3, .ogg, .opus, ...)

Threw Calendar

• Possible to create a show that can be repeated in different manner and can be filled with playlist, smart playlist or webstream
• Possible to set up a live show where someone can broadcast from her home sending a stream to a specific mountpoint

Threw Master Source

• Possible to take the control of the direct broadcast with a specific mountpoint

Icecast

• Possible to stream audio and video in .ogg, .ogv, .mp3 and .opus with software like VLC, DARKICE, MIXXX, BUTT or any other software listed here : http://www.icecast.org/apps/

PiBox

• Possible to play sounds located in the Pi, to play a stream, to play the live input of the sound card
• Possible to listen to a sonification on the output of the integrated soundcard
• Possible to shout in the radio threw a microphone plugged into the input of the external soundcar

How To use Radio Calafou

• Manual LibreTime https://ikerlandajuela.github.io/radiolibre/man/libretime/
• Docs en ingles https://libretime.org/docs/scheduling-shows

SmartPhone journalism

It is possible to use Airtime with a smartphone, see http://sourcefabric.booktype.pro/airtime-25-for-broadcasters/smartphone-journalism/

SmartPhone streaming applications

• Broadcast Myself https://play.google.com/store/apps/details?id=sa.broadcastmyselfpro is an android app to stream live. No more availabe as a free version ::: download the free version here BroadcastMySelf_v0.9.12_apkpure.zip
• Xiph list several apps pour Android et iOS (dont BroadcastMySelf) https://icecast.org/apps/
• NovaStream https://novastreamapps.blogspot.com/ Android
• Coolmic https://coolmic.net/ Android avaialble on F-Droid
• Backpackstudio https://backpackstudioapp.com/ iOS
• iziCast https://danielnoethen.de/iziCast/ iOS
• Giss_Vorbis http://giss.tv/wiki/index.php/Android_Ogg_Streamer_:_Giss_Vorbis

Taking the control live with a smartphone

As mentionned, it is possible to take the control of the radio with a specific mountpoint (the master source mountpoint), it is also possible with an (android) smartphone with the application "Broadcast Myself" (see before) that allow one to stream the mic of the smartphone or files

The settings > Output settings :

• Hostname : radio.calafou.org
• Port : 8001
• Path : /master
• Username : master
• Password : master
• MP3 Encoder Bitrate (as you wish) : 96 Kbit/s

Re-stream the output of airtime on another server

In theory, you can set up several output to an icecast server with Airtime Settings, in practive, it doesn't alway work, so you can also do :

avconv -i http://radio.calafou:8000/airtime_128.ogg -f ogg -|oggfwd -p -d "Hack The Earth" -g "Ecochonies" -u "https://calafoorg/ca/content/hack-earth-2017" labomedia.org 8000 ****** /hacktheearth.ogg

Hardware installation

• Omnius server is in the hacklab
• Pibox and the transmiter is in anarchaserver
• The antenna is on the roof of anarchaserver

Software installation

Icecast2 with ssl support

test if your version of icecast has ssl support

 ldd /usr/bin/icecast2 | grep ssl

si

 libssl.so.3 => /lib/x86_64-linux-gnu/libssl.so.3 (0x00007f10a2cc9000)

so ok

Install last version of icecast from Xiph repo

 nano /etc/apt/sources.list.d/icecast.list

add

 deb http://download.opensuse.org/repositories/multimedia:/xiph/Debian_12/ ./

get the key

 wget -qO - https://build.opensuse.org/projects/multimedia:xiph/signing_keys/download?kind=gpg | sudo apt-key add -
 apt update
 sudo apt-get install -t Debian_12 icecast2

Add a script to create a bundle certificate while certbot renew it

 nano /etc/letsencrypt/renewal/calafou.org-0002.conf

add

 post_hook = cat /etc/letsencrypt/live/calafou.org-0002/fullchain.pem /etc/letsencrypt/live/calafou.org-0002/privkey.pem > /etc/icecast2/bundle.pem && systemctl restart icecast2

And don't forget to change to put ENABLE=true :

 nano /etc/default/icecast2
 # Edit /etc/icecast2/icecast.xml and change at least the passwords.
 # Change this to true when done to enable the init.d script
 ENABLE=true

see https://tech-docs.thisispurefm.com/docs/tech-team/transmission/installing-icecast.html

Liquidsoap

Install liquidsoap via opam

 opam update
 opam upgrade
 eval $(opam env)
 opam info liquidsoap

 sudo apt-get install libpcre3=2:8.39-15
 sudo apt-get install libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libcurl4-gnutls-dev libogg-dev libopus-dev libpcre3-dev libswresample-dev libswscale-dev

 opam install ffmpeg taglib mad lame vorbis opus cry samplerate liquidsoap

See https://opam.ocaml.org/doc/Install.html and https://www.liquidsoap.info/doc-2.4.2/build.html

Script to stream a random audio file from Mediateca

 #!/usr/bin/liquidsoap
 
 mount       = "mediateca.mp3"
 genre       = "random"
 description = "toda la musica de la mediateca en random."
 name        = "Mediateca Random"
 #protocol    = "http"
 port        = 8000
 password    = "*****"
 host        = "localhost"
 url         = "https://radio.calafou.org/"
 #encoding    = "UTF-8"
 
 dir = "/mnt/3t/ftp/MEDIATECA/musica/"
 
 set("log.file.path", "/home/b01/liquidsoap-daemon/scripts/randommediateca.log")
 
 dir = nrj(playlist(mode='randomize',reload=10,reload_mode="rounds",dir))
 
 # A function applied to each metadata chunk
 def append_title(m) =
 title = m["title"]
 album = m["album"]
 date  = m["date"] 
 [("title","#{title} : #{album} (#{date})")]
 end
 dir = map_metadata(append_title, dir)
 radio = mksafe(dir)
 #radio = crossfade(radio)
 
 # Output the full stream in MP3
 output.icecast(%mp3(bitrate=256), 
 host=host,
 port=port,
 password=password,
 mount=mount,
 radio,
 url=url,
 name=name,
 description=description,
 genre=genre)

Daemonize the script

 git clone https://github.com/savonet/liquidsoap-daemon

Put the script in a scripts folder

 cd liquidsoap-daemon/
 ./daemonize-liquidsoap.sh ~/liquidsoap-daemon/scripts/randomplaylistmediateca.liq

Libretime via Docker

• Install using docker https://libretime.org/docs/admin-manual/install/install-using-docker/
• Config reverse proxy https://libretime.org/docs/admin-manual/install/reverse-proxy/
• Config Libretime https://libretime.org/docs/admin-manual/configuration/
• Config the docker

 nano docker-compose.yml

PiBox

See documentation here : http://p-node.org/doc/index.php/V-2

• To the PiBox : http://172.31.17.214/ user : pibox pwd : pnodeaccesspass

For the moment (see troubleshouting), 2 script are launched by /etc/rc.local :

/home/pi/omnioussonification.sh 2> /home/pi/streamlog.txt >/dev/null &
/home/pi/airtimeplayer.sh 2> /home/pi/streamlog.txt >/dev/null &

omnioussonification.sh :

#!/bin/bash
while true;do
 AUDIODEV=hw:0,0 play -t ogg http://radio.calafou:8000/omniussonification.ogg
 sleep 3
done

airtimeplayer.sh

#!/bin/bash
while true;do
 AUDIODEV=hw:1,0 play -t ogg http://radio.calafou:8000/airtime_128.ogg
 sleep 3
done

Troubleshouting

Libretime

Libretime doesn't seems to play sound, show the media builder or eat new sounds

The 3 magic command to restart everything (you have to be logged in omnius :

sudo service airtime-media-monitor restart
sudo service airtime-liquidsoap stop
sudo service airtime-liquidsoap start
/!\ it appears that 'restart' doesn't work, liquidsoap doesn't take the modifications made in System > Streams
sudo service airtime-playout restart

also, see the logs in /var/log/airtime/

Libretime doesn't take into account the modifications made in System > Streams

Relaunching liquidsoap seems necessary :

sudo service airtime-liquidsoap stop
sudo service airtime-liquidsoap start

Test a stream configuration

liquidsoap 'output.icecast(%vorbis, host = "radio.calafou", port = 8000, user = "source" password = "hackme", mount = "liq.ogg", sine())'

Airtime doesn't alway wait for the end of the track

Don't know why ...

The master mount point 8001 can't be reached when Libretime is inside a LXC container

add these iptables rules (the container ip is 192.168.122.11):

iptables -I FORWARD -p tcp -d 192.168.122.11 --dport 8001 -j ACCEPT
iptables -A INPUT -p tcp --dport 8001 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp --dport 8001 -j DNAT --to-destination 192.168.122.11:8001

Antenna

The tube on which I was planning to fix the antenna is about to fall !

So I used instead a solid metal piece fixed to the wall, but the antenna is only fixed in one point with plastic bracelets (colson) and 2 wires fixed to 2 solid metal points

I'm not sure it is really good on a long time perspective ...

Audio sources - web radios

• Coordinadora de Ràdios Lliures de Catalunya http://www.radioslliures.info/
• http://www.contrabanda.org/
• http://radiobalamanresa.wordpress.com/
• http://www.radiobronka.info/
• http://www.radiolinea4.net/
• http://radiopica.cat/
• http://www.radiorsk.info/