Icecast - May 2014 - Hiccup on streaming

Hi all, this is my first time on this list.
I have a very basic icecast2 server installed from Ubuntu repository.
It's running on a linux Ubuntu Studio 12.04 LTS with an Athlon 64 X2 5200+.
This linux box is at a Community FM Radio Station.

We installed a radio automatization software called "Radit".
Radit is developed by a spanish guy and runs very well. It's open source
and multi-platform.

Radit is a four program combo: an automatizer, an encoder, a weather
reporter (get humidity, temp,etc) and a playing grid.
Sorry if I can't describe exactly, english is not my main language.

The encoder uses mp3, ogg and aac+, with bitrates from 32 to 320.

The problem is that we have some hiccups on the streaming.
Example, lets say we listen the phrase: "this is my black pencil"
on the streaming we hear:"this...ak pencil"

I didn't play much with config, just changed user, password and host
The encoder is pointing to localhost and I've tried every combination of
mp3,ogg and aac+ with different bitrates.
We hear hiccups all the time from internet (it's not the buffering hold,
that is normal).

I've checked PC, everything is normal. I didn't have yet the chance to
listen from same lan.
Maybe someone can point me right direction.

thanks
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On 05/23/2014 06:55 PM, dragonauta wrote:
> Hi all, this is my first time on this list.
> I have a very basic icecast2 server installed from Ubuntu repository.
> It's running on a linux Ubuntu Studio 12.04 LTS with an Athlon 64 X2
> 5200+.
> This linux box is at a Community FM Radio Station.
>
> We installed a radio automatization software called "Radit".
> Radit is developed by a spanish guy and runs very well. It's open
> source and multi-platform.
>
> Radit is a four program combo: an automatizer, an encoder, a weather
> reporter (get humidity, temp,etc) and a playing grid.
> Sorry if I can't describe exactly, english is not my main language.
>
> The encoder uses mp3, ogg and aac+, with bitrates from 32 to 320.
>
> The problem is that we have some hiccups on the streaming.
> Example, lets say we listen the phrase: "this is my black pencil"
> on the streaming we hear:"this...ak pencil"
To get a better idea of where that happens you should check if this
"skipping" is the same for all listeners, if yes, then it comes from
the
source client, if not it is something between icecast and the listener
client.

> I didn't play much with config, just changed user, password and host
> The encoder is pointing to localhost and I've tried every combination
> of mp3,ogg and aac+ with different bitrates.
> We hear hiccups all the time from internet (it's not the buffering
> hold, that is normal).
>
> I've checked PC, everything is normal. I didn't have yet the chance
to
> listen from same lan.
> Maybe someone can point me right direction.
It could be that the source client skips for some reason, e.g. because
of CPU load. This can easily happen also on a multi-CPU system if the
encoding is single threaded and saturates the core on which it's running.

I don't have an immediate idea where your problem could be coming from,
so it's important to go step by step and rule out each part. It might
help to look at all possible logging, both on the source and on the
icecast (error.log) side.

Good luck fixing your issue!

Thomas

Thanks Thomas


2014-05-23 17:44 GMT-03:00 "Thomas B. R?cker" <thomas at
ruecker.fi>:
> On 05/23/2014 06:55 PM, dragonauta wrote:
> > Hi all, this is my first time on this list.
> > I have a very basic icecast2 server installed from Ubuntu repository.
> > It's running on a linux Ubuntu Studio 12.04 LTS with an Athlon 64
X2
> > 5200+.
> > This linux box is at a Community FM Radio Station.
> >
> > We installed a radio automatization software called "Radit".
> > Radit is developed by a spanish guy and runs very well. It's open
> > source and multi-platform.
> >
> > Radit is a four program combo: an automatizer, an encoder, a weather
> > reporter (get humidity, temp,etc) and a playing grid.
> > Sorry if I can't describe exactly, english is not my main
language.
> >
> > The encoder uses mp3, ogg and aac+, with bitrates from 32 to 320.
> >
> > The problem is that we have some hiccups on the streaming.
> > Example, lets say we listen the phrase: "this is my black
pencil"
> > on the streaming we hear:"this...ak pencil"
>
> To get a better idea of where that happens you should check if this
> "skipping" is the same for all listeners, if yes, then it comes
from the
> source client, if not it is something between icecast and the listener
> client.
>
>
We tried with muses.org (radio player online) and TuneIn from diferent
locations, even with differents ISP.
Using PC and android smartphone.
Also tested with vlc

If you anyone wants to check:
Look at TuneIn for "Radio Barriletes"
Our player (muses): http://barriletes.org.ar/radio1.html
And direct access: http://radiobarriletes.sytes.net:8000/barriletes.mp3

I didn't tested on site, through lan, because I'm not at that location
right now. It's a test I want to perform.

>
> > I didn't play much with config, just changed user, password and
host
> > The encoder is pointing to localhost and I've tried every
combination
> > of mp3,ogg and aac+ with different bitrates.
> > We hear hiccups all the time from internet (it's not the buffering
> > hold, that is normal).
> >
> > I've checked PC, everything is normal. I didn't have yet the
chance to
> > listen from same lan.
> > Maybe someone can point me right direction.
>
> It could be that the source client skips for some reason, e.g. because
> of CPU load. This can easily happen also on a multi-CPU system if the
> encoding is single threaded and saturates the core on which it's
running.
>
> Linux top shows this
Tasks: 174 total,   2 running, 172 sleeping,   0 stopped,   0 zombie
Cpu(s): 27.5%us,  6.8%sy,  0.0%ni, 65.1%id,  0.4%wa,  0.0%hi,  0.2%si,
 0.0%st
Mem:   1931676k total,  1650232k used,   281444k free,   468284k buffers
Swap:  2095100k total,   108644k used,  1986456k free,   890236k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 1918 operador  20   0  543m  70m  21m S   14  3.7   5401:22 Radit
 1904 operador  20   0  268m  20m  13m S    6  1.1   2804:29 raditcast
 1739 operador   9 -11  180m 6724 4644 S    4  0.3   2105:52 pulseaudio
24929 operador  20   0  4460 1924  744 S    4  0.1  11:31.26 lame

Radit its the automatizer, raditcast is the wrapper that uses lame to
encode and makes connection to icecast2


> I don't have an immediate idea where your problem could be coming from,
> so it's important to go step by step and rule out each part. It might
> help to look at all possible logging, both on the source and on the
> icecast (error.log) side.
>
> I looked at logs, everything looks normal. Logs are in level 3 (should I
turn debug on?)


> Good luck fixing your issue!
>
> Thomas
>
>
Thank you again

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GPG-Key: 2FFBC43B
Linux Registered User #436806
www.preguntaslinux.org :: supermoderador
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