To the kind attention of Kurento experts,
I would like to share the conversation with Luis Lopez about a video
quality issue, in order to have your support through Jira as we have been
told.

Thank you

---------- Forwarded message ----------
From: Luis L�pez Fern�ndez <luis.lopez@urjc.es>
Date: 2015-04-21 20:38 GMT+02:00
Subject: Re: Kurento > video quality
To: Leonardo Galteri <leonardogalteri@gmail.com>

Hi Leonardo,
Today we have been informed that the FIWARE policies for providing support
to Accelerator's participants need to be satisfied. Unfortunately this
means that I can only provide support to you through the FIWARE Jira. I
would appreciate if you could open a Jira issue for tracking this problem.
Otherwise, the efforts we invest here shall be not covered by FIWARE, which
is somehow a problem for us.

Sorry for the inconveniences.

Best.

-----------------------------------------------------------
Luis L�pez Fern�ndez
Subdirector de Investigaci�n y Relaciones con la Empresa
Escuela T�cnica Superior de Ingenieros de Telecomunicaci�n
Universidad Rey Juan Carlos
http://www.etsit.urjc.es
e-mail: luis.lopez@urjc.es
Tf1: +34 914 888 747
Tf2: + 34 914 888 713

El 21/04/2015, a las 20:30, Leonardo Galteri <leonardogalteri@gmail.com>
escribi�:

Hi Luis,
thank you for your reply, unfortunately we haven't many choices because of
the limitations of the video formats, but this could be a solution.
Allowing a good quality streaming towards Wowza and let this server handle
the distribution of the stream to iOS/Android users with HLS protocol. Is
it a feasible solution in your opinion? How can I change the transcoding
bitrate in Kurento, is there a configuration file, an API or is it a
hardcoded parameter?

Thank you again

2015-04-20 16:37 GMT+02:00 Luis L�pez Fern�ndez <luis.lopez@urjc.es>:

> Hi,
> Indeed 300Kbps is the default configuration of KMS transcoders. This can
> be changed, but only to a fixed value. In other words, you can improve the
> quality but it will not be adaptive because RTMP don't support adaptive
> quality. Is this what you are looking for?
>
> Best.
>
> -----------------------------------------------------------
> Luis L�pez Fern�ndez
> Subdirector de Investigaci�n y Relaciones con la Empresa
> Escuela T�cnica Superior de Ingenieros de Telecomunicaci�n
> Universidad Rey Juan Carlos
> http://www.etsit.urjc.es
> e-mail: luis.lopez@urjc.es
> Tf1: +34 914 888 747
> Tf2: + 34 914 888 713
>
>
>
>
>
>
> El 20/04/2015, a las 16:33, Leonardo Galteri <leonardogalteri@gmail.com>
> escribi�:
>
> Hello Luis,
> the problem is that Wowza doesn't support VP8 format, so we have to use
> the RtpEndpoint on Kurento to perform our stream with the standard h.264.
> In this way, the bitrate is fixed to 300 kb/s, that is we have a bad
> quality blocky video, whatever protocol we choose in Wowza in order to
> stream to any mobile device.
> Furthermore, even if we don't use Wowza, if we reproduce the RTP stream
> obtained from Kurento with any other tool (VLC, ffplay, gst-play, etc) we
> obtain exactly the same result, a fixed bitrate of 300 kb/s.
>
> Thank you
>
> 2015-04-20 16:16 GMT+02:00 Luis L�pez Fern�ndez <luis.lopez@urjc.es>:
>
>> Hi,
>> Indeed RTMP don't support adaptive quality. This is one of the reasons
>> why other protocols such as WebRTC or HLS were created. In principle, if
>> latency is not an issue for you, you should be able to stream from Wowza
>> using adaptive protocols such as HTS or MPEG-DASH, which are supported by
>> Wowza off-the-shelf. However, this may also require specific players which
>> are not always free.
>>
>> Best.
>>
>> L.
>>
>>
>> El 20/04/2015, a las 15:00, Daniele Galiffa | GoalShouter.com
>> <http://goalshouter.com/> <daniele@goalshouter.com> escribi�:
>>
>> Ciao Luis, how are you doing?
>>
>> I hope everything is great.
>>
>> We are continuing working on Kurento but we have some issues in streaming
>> from Kurento to Wowza but it seems that RTMP stream has a fixed video
>> quality.
>>
>> Is there any chance to change or set it?
>>
>> Leo is in cc to provide more tech-details about the issue we are trying
>> to solve.
>>
>> Thanks,
>> d.
>>
>>
>> –
>>
>> [image: GoalShouter] <http://www.goalshouter.com/>Daniele Galiffa | CEO
>> daniele@goalshouter.com <rafaele@goalshouter.com> | +39 335 57 53 078
>> GoalShouter.com <http://www.goalshouter.com/> | [image: View my profile on LinkedIn] <http://linkedin.com/in/danielegaliffa> [image: Follow me on Twitter] <http://twitter.com/danielegaliffa> [image: Skype me] [image: Facebook Page] <https://www.facebook.com/GoalShouter> [image: Get iPhone App for free] <http://itunes.apple.com/app/goalshouter/id428932802?mt=8>
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>> StartUp Sauna Demo Day Winner | Helsinki, June 8th 2012
>>
>>
>>
>
>

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[Created via e-mail received from: Leonardo Galteri <leonardogalteri@gmail.com>]