Streaming with Airtime - Airtime Support Discussions on Sourcefabric Forum

Micz Flor

Airtime is streaming using icecast. just wanted to share this in the forum under a seperate thread, after i stumbled across the information in other posts:

On Tue, 2011-01-18 at 22:48 +0100, Paul Baranowski wrote:
"mplayer http://localhost:8000/airtime.mp3"
is what allows you to hear what is being played.

On Tue, 2011-01-18 at 21:51 +0100, Martin Konecny wrote:
By default the software is setup to output to icecast server, which allows streaming over the internet. You can get sound on your speakers by connecting to the icecast server with VLC or mplayer.

any testing, issues, discussion regarding the streaming can happen here.

Nick

I have installed Airtime and I have it configured. I followed the instructions from source and I have my Icecast2 Server up and running as well. My problem is that the mplayer http://localhost:8000/airtime.mp3 does not work to connect to I checked the icecast2 admin panel and not mount points are active. I do not know what I need to do to fix this so I can make this function correctly. Please advise.

Nick

Martin Konecny

Hi Nick.

Are you running a 32-bit version of Ubuntu? We recently found some issues that have been addressed in the latest revision in the Git repository. If you feel comfortable enough, download this and then do an uninstall/reinstall + reboot.

Otherwise, you can wait until this Monday (Feb 14) for the final release.

Nick

Yes I am running 32 bit, I tried the new git and I uninstalled and reinstalled. I rebooted then scheduled a 30 minute block it plays and goes into On-Air but I still have no connection to the icecast2 server. There are no mount points listed in the icecast2 server admin and when I got to localhost:8000 icecast2 comes up but if I add the /airtime.mp3 it is not there.

Verheek

I have the same problem. I have followed the above instructions to install the lastest git. I did some digging and found that the pypo-liquidsoap service is not running. when I run

sudo -u pypo /opt/pypo/bin/liquidsoap/liquidsoap /opt/pypo/bin/scripts/ls_script.liq

manually, it says Quote:

/opt/pypo/bin/liquidsoap/liquidsoap: error while loading shared libraries: libgavl.so.1: cannot open shared object file: No such file or directory

. I guess some dependency is missing?

Verheek

However, if I run

cd liquidsoap/src && ./liquidsoap 'output.icecast(%vorbis, mount="test.ogg", sine())'

it creates an ogg sine wave output mountpoint as expected. So I'm pretty sure my liquidsoap and Icecast2 are setup correctly.

Verheek

So after installing libgavl with apt-get I reran

sudo -u pypo /opt/pypo/bin/liquidsoap/liquidsoap /opt/pypo/bin/scripts/ls_script.liq

and I got:

Quote:

Fatal error: exception Sys_error("/usr/share/camomile/database/general_category.mar: No such file or directory")

There are no subfolders from camomile and below.

So now what?

Martin Konecny

Hi Jeremy,

We have been able to recreate this issue in the office on another 32-bit machine. Hopefully we have this sorted by Monday Smile

Verheek

Great! I installed Camomile from source although there seems to be a .deb . I suppose libgavl and Camomile have to do with the package config of liquidsoap not matching the setup page for liquidsoap. I guess it's necessary to copy the new liquidsoap file created from source to /opt/pypo/bin/liquidsoap. Otherwise, it still has portaudio and other stuff in it from the git version??

When I run

cd /opt/pypo/bin/scripts/ && sudo -u pypo /opt/pypo/bin/liquidsoap/liquidsoap /opt/pypo/bin/scripts/ls_script.liq

I get

Quote:

Failed to stat home directory /home/mediashout: Permission denied
W: core-util.c: Failed to open configuration file '/home/mediashout/.pulse//daemon.conf': Permission denied
W: daemon-conf.c: Failed to open configuration file: Permission denied
init: exception encountered during main phase:
Pulseaudio.Error(6)
exception: Pulseaudio.Error(6)

Martin Konecny

Jeremy,

A temporary solution to fix the libgavl problem and other linking issues is compile liquidsoap from source on your own machine.

It appears that you have already compiled your own version, please take your own compiled binary from liquidsoap/src/ and overwriting airtime/pypo/liquidsoap/liquidsoap32

Then try running "sudo php airtime-install.php" again.

Verheek

Hi Martin,

Thanks, yes, I've copied my compiled liquidsoap as you suggest above and reran the install. I checked that it had copied to the liquidsoap sub-folder of /opt and indeed it had. However, I still get the same error about Pulseaudio when liquidsoap is invoked with the svc command. This is just because the user Pypo does not have write permissions there. When I run the test line from the Liquidsoap developer page it works, naturally.

Do I comment or uncomment items in the liquidsoap PACKAGES file to disable packages? I read the information in it and it left me confused. It seems pulseaudio, portaudio and some others are still compiling anyway judging by the summary after ./configure is run. I know it is reading the PACKAGES file because it complains when I delete it. I copied in the PACAKGES.default and removed # as per the developer wiki page but same thing. ??

Martin Konecny

We actually made the choice the drop pulseaudio this week since it is a layer that brings nothing to us in terms of features.

I havent had time to update the wiki yet, will do it tonight.

For now just do a "sudo apt-get purge pulseaudio"

also make sure the "pypo" user is in the audio group and not in the pulse-access group.

To check what groups he is in do:

su pypo (password is pypo)
groups (to see user's groups).

If pypo is in group pulse-access type
sudo deluser pypo pulse-access
and then
sudo adduser pypo audio

After you restart your computer, pypo should lock the soundcard during boot and your sound should play.

Verheek

Ok I have checked and completed everything above.

I still have one error and it's relating to Alsa. It just occured to me, reading the last line above, that I am using a server with no sound card. In the past I used snd_aloop to create a dummy for playback with Darkice or used Jack.

Martin Konecny

if you want to use for streaming only, try the following:

open airtime/pypo/scripts/ls_script.liq

and on line 63 put a # symbol to make the line look as follows:
"#out(radio)"

Then run the install script again.

Let me know how this works out for you.

Verheek

Thanks for the tip.

The good news is that liquidsoap is working now having loaded snd-aloop from Alsa 1.0.23. I compiled and installed alsa-drivers, alsa-libs, and alsa-utils according to the INSTALL file in each and this page:
http:// monespaceperso.org/blog-en/2010/05/02/upgrade-alsa-1-0-23-on -ubuntu-lucid-lynx-10-04/

Then:

sudo modprobe snd-aloop

After reboot it worked! I have an airtime mountpoint showing silence.mp3 in icecast.

This way I can also use the Ubunutu Virtual Machine on a box with a sound card.

Zdravko

Martin Konecny wrote on Fri, 11 February 2011 06:41

if you want to use for streaming only, try the following:

open airtime/pypo/scripts/ls_script.liq

and on line 63 put a # symbol to make the line look as follows:
"#out(radio)"

Then run the install script again.

Let me know how this works out for you.

BTW I just installed airtime 1.6-release on Ubuntu server 10.04 and this 'fix' worked just fine and it makes sense (I don't need alsa/sound card on my VPS).

Martin Konecny

Zdravko, glad to hear that. For version 2.0 configuring these output types should be much more user friendly Smile

Boris Zhidkov

Hi.
I have a trouble with the playback.
I'd added a show and it has started right in web-interface ("ON-AIR" had been highlighted).
But when I've ran mplayer all I heard - it's just a silence (ICY Info: StreamTitle=' - silence30min' Wink

.
Here is the content of log/pypo/ls_script.log: http://pastie.org/1583181

Andrey Podshivalov

hi Boris,

you need to set up properly the timezone parameter in php.ini. It should be the same as system timezone.

For example: date.timezone = "Europe/Moscow"

Boris Zhidkov

Timezone is set correctly (I'd installed the airtime by follow the instructions from here: http://wiki.sourcefabric.org/display/CC/Installing+Airtime+% 28v1.6%29).
But my airtime is situated in /var/www/airtime and has address airtime.local.
There is /etc/apache2/sites-enabled/airtime: http://pastie.org/1583504

Also I've got error messages in apache log: [Sat Feb 19 23:39:01 2011] [error] [client 127.0.0.1] File does not exist: /var/www/api

Andrey Podshivalov

by default airtime uses just localhost address. I recommend to install airtime with localhost and to make sure that is working ok. After then you can change the settings to work with non-localhost (I'll explain later).

Boris Zhidkov

Thanks, Andrey.
It works now.

Andrey Podshivalov

good,

as I've promised there are changes in config files to get working airtime on non-localhost:

./application/configs/conf.php: 'storageUrlHost' => 'your.new.host.name',
./application/configs/conf.php: 'archiveUrlHost' => 'your.new.host.name',
./pypo/config.cfg:base_url = 'http://your.new.host.name/'

Boris Zhidkov

I've changed the configuration files, but I've got the same error:
[error] [client ::1] File does not exist: /var/www/api

Link to application config.php: http://pastie.org/1586778
and to pypo/config.cfg: http://pastie.org/1586792

Andrey Podshivalov

check that airtime.localhost is properly installed: open in the browser http://airtime.localhost/api/schedule/
You should see "You are not allowed to access this resource."

Boris Zhidkov

Yes, it looks right.
http://dl.dropbox.com/u/2167984/screenshots/airtime-api.png

Andrey Podshivalov

ok,

then reinstall airtime again:

cd ./install
sudo php ./airtime-uninstall.php
sudo php ./airtime-install.php

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