[Linphone-developers] Linphone issue on iPhone 5 (iOS 6): tabs not clickable

[Shu-Hsuan Lin]

Hi,

I'm using linphone's iphone project. Now I have this issue where I cannot
touch on any of the tabs at bottom, but everything else seems to be working
fine. I was guessing it's because the screen size got longer and it's
stretched or something but can't really figure out the solution.

Also, when switching to dialer or more tab will cause
UIViewControllerHierarchyInconsistency exception. But I don't really see
where the views are being associated twice.


Best,


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Today's Topics:

   1. Re: Video quality control system on linphone (with fallback
      to audio) (IVAN FERNANDEZ)
   2. Re: Need Help : Unable to Open Camera in Linphone Using
      MediaStreamer (Guillaume BERAUDO)
   3. Linphone on IPhone Simulator (Roman K?nig | BEL NET GmbH)
   4. Re: Linphone on IPhone Simulator (Diorcet Yann)


----------------------------------------------------------------------

Message: 1
Date: Tue, 23 Oct 2012 15:55:02 +0200
From: IVAN FERNANDEZ <address@hidden>
To: address@hidden
Subject: Re: [Linphone-developers] Video quality control system on
        linphone (with fallback to audio)
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset="windows-1252"

Thanks,

I've been digging in the media streamer2 code and I've seen that it
implements a *quality indicator *system that can be consulted from linphone
code through the method *linphone_call_get_current_quality*.

I've tested that system on a call and the system is returning the expected
values: 4-5 when the connection is good and lower values as the connection
goes worse.

This system applies the quality analysis over the audio stream so, the
question now is... for audio/video calls controlling...

- would it be necessary to implement a second quality indicator over the
video stream?

- or is not necessary this second indicator cause the analyzed RTCP SR is
common for audio and video?

I hope to have exposed my doubt clearly?


Thankd again and regards

2012/10/22 Sergio Garcia Murillo <address@hidden>

>  +1
>
> Also, I will implement exactly what you are describing in my MCU, so 
> will be happy to collaborate/share with the development if needed.
>
> Best regards
> Sergio
>
> El 21/10/2012 21:41, Gunnar Hellstr?m escribi?:
>
> Ivan,
> Part of what you ask for is available in Linphone.
> In RFC 3550, RTP, there are defined periodic reports through the RTCP 
> transmissions.
> The proposed frequency of these reports is one per a few seconds, e.g. 
> 5 seconds.
>
> The contents of the RTCP RR Receiver Reports is supposed to contain a 
> number of fields for feedback from receiver to transmitter. Among 
> these fields are fields for reporting packet loss, and jitter.
>
> However, I have not seen this part of the RTCP reports from Linphone. 
> So, for making use of this reporting for Linphone, I see two actions
required:
>
> 1. Add at least packet loss info and possibly more quality related 
> RTCP fields to the RTCP RR reports.
>
> 2. Add evaluation logic of the RTCP RR reports for video, and 
> introduce as a first action when bad transmission is reported, to 
> reduce target bandwidth, reduce resolution to QCIF and increase 
> Quantization. Only if that is not sufficient, you may optionally turn 
> off video, but that should be on agreement with the user. Maybe you 
> can select a more narrow band audio codec instead. A video stream even 
> at low resolution may say more than 1000 words.
> Remember to also have a smooth algorithm for trying to regain 
> bandwidth and quality when networks seem better, but be careful to not 
> enter wild feedback fluctuations in these changes.
> It is also good to include an option to use text, e.g. real-time text 
> as a complement that usually goes through even in terrible network
conditions.
>
> Maybe the Linphone team already has something in this direction 
> planned or developed?
>
> Regards
> Gunnar
>
> ----------------------------------------------------------------------
> ---
>
> On 2012-10-19 15:03, IVAN FERNANDEZ wrote:
>
> Hi list,
>
> I've got both mobile versions of linphone (iOS/Android) working and 
> supporting h264 video. Now, I'm looking for a way to automatically 
> make a fallback video->audio when connectivity decrease in the middle 
> of a video call.
>
> I think is not exactly a question of QoS. Maybe the Linphone would 
> make periodically some kind of check over the video that is receiving 
> (bitrate, packets lost?) in order to apply the fallback to audio if 
> low quality levels are read for a fixed lap time.
>
> What do you think about? Any of you have implemented something similar?
> Any hints?
>
> Thanks in advanced,
>
> Regards and have a good weekend
>
>
> _______________________________________________
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> address@hidden://lists.nongnu.org/mailman/lis
> tinfo/linphone-developers
>
>
>
>
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Message: 2
Date: Tue, 23 Oct 2012 16:06:01 +0200
From: Guillaume BERAUDO <address@hidden>
To: address@hidden
Cc: address@hidden, address@hidden
Subject: Re: [Linphone-developers] Need Help : Unable to Open Camera
        in Linphone Using MediaStreamer
Message-ID: <address@hidden>
Content-Type: text/plain; charset=US-ASCII

Hi,


This seems a nice project.


Do you have a link to the native API documentation?

I can only found about the javascript API.


Cheers,

Guillaume

> Respected Sir,
> 
> I am currently trying to port Linphone to a* Linux based *Operating 
> System based on *ARM platform* called *Tizen*.
> 
> I have completed the build of the latest version of Linphone (3.5.2) 
> and also of the mediastreamer library (version 2.8.2). When I try to 
> run the same on the device, I am able to receive/transfer sound 
> between two devices using pulse audio. (Though the *sound is 
> accompanied with considerable amount of noise*).
> 
> Whenever I enable the Video support of linphone, I am *unable* to open 
> the web-cam of the device through  *v4l2 video filter*.
> 
> Hence, the audio call is possible, however no video call can be made.
> (Camera does not open)
> 
> I have observed that, linphone uses mediastreamer which in-turn uses 
> msv4l and msv4l2 drivers to interact with the camera for linux PC.
> However, the Tizen (ARM & Linux based) device does not support v4l or
> v4l2 drivers. The Tizen device, however uses *Gstreamer* to open its 
> native camera.
> 
> To support video call in linphone, according to me, there can be two 
> approaches and queries based on the same:
> 
> 1. *A separate Video(WebCam) Filter* for interacting with the Tizen 
> camera can be created inside mediastreamer, in this case, are there 
> any examples (sample code)/demos/documentation which can help us
> *create* an effective *video
> filter* inside MediaStreamer?
> 
> 2. An alternative to MediaStreamer called *Gstreamer* can be used. In 
> this case, I would like to know,  whether, there is any version of 
> Linphone which has already been built with Gstreamer support. If so, I 
> would be grateful, if you could kindly share the code/ location of the 
> code. Also, if not Gstreamer, is there any other streaming library 
> which could be built with Linphone.
> 
>  Additionally, the audio call is also accompanied with a lot of noise, 
> and we have tried "echo cancellation"  to no avail. If there can be 
> anyway, the *noise can be reduced* during the calls.
> 
> Also, apart from these two approaches, if anything else could be done 
> to enable video calling for the Tizen (ARM) based device, I would 
> really appreciate if you could enlighten me with the same.
> 
> Lastly, the I would like to thank you for taking out the time to read 
> and respond to these queries.
> Any sought of help from your side would be highly appreciated.
> Expecting a positive response. Thanking you in advance for the same.
> 
> 
> Saurav Maitra
> IIIT-Delhi
> 2008047




------------------------------

Message: 3
Date: Tue, 23 Oct 2012 14:28:20 +0000
From: Roman K?nig | BEL NET GmbH <address@hidden>
To: "address@hidden" <address@hidden>
Subject: [Linphone-developers] Linphone on IPhone Simulator
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset="iso-8859-1"

Dear list,

Has anyone the same problem with incoming calls, if the Iphone uses another
application at the moment and the linphone application is in background?

My problem is, that if I call the user who uses at the moment another
application in simulator, the user is not reachable. But after 9minutes and
some seconds letting the simulator in the used application a linphone alert
appears and asks for this call.

Anyone with the same problem?
I develop with the simulator. Is that probably a simulator problem?

Any idears?

Regards,
Roman.
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Message: 4
Date: Tue, 23 Oct 2012 16:33:56 +0200
From: Diorcet Yann <address@hidden>
To: address@hidden
Subject: Re: [Linphone-developers] Linphone on IPhone Simulator
Message-ID: <address@hidden>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

Hi Roman.
The background mode is not correctly handled by the simulator. So it is
normal that you have strange behavior when you use with the application.

Regards,

Le 23/10/12 16:28, Roman K?nig | BEL NET GmbH a ?crit :
> Dear list,
>
> Has anyone the same problem with incoming calls, if the Iphone uses 
> another application at the moment and the linphone application is in 
> background?
>
> My problem is, that if I call the user who uses at the moment another 
> application in simulator, the user is not reachable. But after 
> 9minutes and some seconds letting the simulator in the used 
> application a linphone alert appears and asks for this call.
>
> Anyone with the same problem?
> I develop with the simulator. Is that probably a simulator problem?
>
> Any idears?
>
> Regards,
> Roman.
>
>
> _______________________________________________
> Linphone-developers mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/linphone-developers


--
*Yann Diorcet*

<http://www.belledonne-communications.com>
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