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Re: [Linphone-developers] how can i add other codecs to linphone windows

From: Sandrine
Subject: Re: [Linphone-developers] how can i add other codecs to linphone windows version 3.10.2 ?
Date: Wed, 7 Sep 2016 17:06:38 +0200

Hi Bernd (that’s ok, no offense taken )

If you have wireshark installed, could you capture and then send us the .pcap logs of a videoconference 
with linphone and another one with Ekiga so that we have a chance to pinpoint exactly 
where the problem is?

We’ll see for H263 afterwards.

Best regards,

Sandrine Avakian
Software Engineer

Le 7 sept. 2016 à 16:33, Lentes, Bernd <address@hidden> a écrit :

Hi Sandrine (omg, all the time i spelled your name wrong. Sorry),

that didn't help. I tried all three, udp, tcp and tls. I also created an account and choosed tcp, that didn't help either.
What i'd like to do is trying another codec. Like H.263. VP8 is not supported from the other side.
How difficult is it to compile another one on windows ? I never did that.
Just a few times on linux when installung software from the sources.
Do you have a HowTo for that ?


Bernd Lentes

institute of developmental genetics
Gebäude 35.34 - Raum 208
HelmholtzZentrum München
phone: +49 (0)89 3187 1241
fax: +49 (0)89 3187 2294

Erst wenn man sich auf etwas festlegt kann man Unrecht haben
Scott Adams

----- On Sep 7, 2016, at 4:00 PM, Sandrine address@hidden wrote:

I see you are not using any linphone sip account that’s why the Ëdit »does not
In this case, add "; transport=tcp » at the end of the address you are calling
e.g : < sip:address@hidden ; transport=tcp >

Sandrine Avakian
Software Engineer

Le 7 sept. 2016 à 15:29, Lentes, Bernd < address@hidden > a
écrit :

Hi Sabrina,

thanks for your support. You are doing a good job.
In Options->Preferences->Manage sip accounts i don't find . to switch off
See attached screenshot.

I will test the other stuff and let you know.


Bernd Lentes

----- On Sep 7, 2016, at 2:55 PM, Sandrine
address@hidden wrote:

Hi Bernd,

We think there may be a misunderstanding between linphone and your other
There are a few options to try solve this out.

If the other equipment supports TCP, try using TCP as the transport
(Options->Preferences->Manage sip accounts->Edit
set transport to TCP).

If not, disable all the other unused codecs (Options,Preferences->Codecs) :video
for audio only keep the one you want to use enabled, disable the others.
We would like you to try out is to explicitly set a bandwidth limit on upload
and download of 1Mbits/s (Options->preferences->multimedia settings->bandwidth).

Get back to us to tell us if it’s better.

Sandrine Avakian
Software Engineer

Le 7 sept. 2016 à 13:31, Lentes, Bernd < address@hidden > a
écrit :

Hi Sabrina,

now the log attached.
What i found out:

error: 2016-09-07 11:14:22:770 QOSAddSocketToFlow failed to add a flow with
error 87 appears several times.
What does that mean ? Is it severe ?

Is the following interesting ?
message: 2016-09-07 11:14:23:315 Using the 'custom' video preset non-tagged
message: 2016-09-07 11:14:23:315 target bitrate not set for stream [006330D8]
using payload's bitrate is 1500000
message: 2016-09-07 11:14:23:315 Limiting bitrate of video encoder to 1500000
bits/s for stream [006330D8]
message: 2016-09-07 11:14:23:315 OpenH264 encoder: Video configuration set:
bitrate=1500000bits/s, fps=30,000000, vsize=640x480
message: 2016-09-07 11:14:23:315 MSOpenH264Enc: disabling AVPF
warning: 2016-09-07 11:14:23:324 Getting reference signal but no echo to
synchronize on.
warning: 2016-09-07 11:14:23:324 Not enough ref samples, using zeroes
message: 2016-09-07 11:14:23:324 MSAudioMixer [062A5770] is entering bypass
message: 2016-09-07 11:14:23:334 Samples are back.
error: 2016-09-07 11:14:23:433 no such method on filter MSOpenH264Dec, fid=16389
method index=7
error: 2016-09-07 11:14:23:434 no such method on filter MSOpenH264Dec, fid=16389
method index=8
message: 2016-09-07 11:14:23:472 LinphoneCall[048F8730] : payload type 96
H264/90000 fmtp=profile-level-id=42801F added to frozen list.

What is "frozen list" ?

RTP audio=[d= 80,0,u= 79,9], video=[d= 65,5,u=1541,4], text=[d= 0,0,u= 0,0]
RTCP audio=[d= 0,0,u= 0,0], video=[d= 0,0,u= 0,0], text=[d= 0,0,u= 0,0]
message: 2016-09-07 11:14:26:803 Thread processing load: audio=5,020779
video=11,349777 text=0,000000

appears often. Video d (downstream ?) is mostly between 60 - 70 (Kbit/s ?).
That's the problem, isn't it ? What's the reason ?



----- Am 6. Sep 2016 um 16:39 schrieb Sandrine
address@hidden :

Hello Bernd,

Did you modify any parameter to control the bandwidth?
Options->preferences->multimedia settings ->Bandwith control
Could you check what is happening in the linphone debug logs when you start a
video call in H264? (Help->debug window)
If unclear, please send the logs to me.

Kind regards,

Sandrine Avakian
Software Engineer

Le 6 sept. 2016 à 16:11, Lentes, Bernd < address@hidden > a
écrit :

Hi Sabrina,

thanks for your answer. I'm not used to compiling on windows, so i will not try
My problem is: we need to participate on a vc. I try to establish it with
linphone. The vc system is a Tandberg device. The video stream i get from the
tandberg is just 64Kbit/s, which is of course very rare, so quality is poor. My
video upload to the tandberg is ok.
I try to paste screenshots here: if it's not possible to send this e-Mail i can
offer the screenshots as a download.


And a screenshot from the Admin Webconsole of the MCU:

You see a rate limit from 64Kbit/s.

Using Ekiga as a client (which i don't want to use, it's not stable) i have a
rate limit of 4.1 Mbit/s. So quality is much better.
Anything i can do on that ?



----- Am 6. Sep 2016 um 15:17 schrieb Sandrine <
address@hidden >:


Due to patents issues, H263 is indeed not included in the release.

To have H263 in linphone-desktop, a new build from source has to be made with a
few specific compilation options:

We believe H264 is still a better alternative though.

Sandrine Avakian
Software Engineer

Le 6 sept. 2016 à 11:25, Lentes, Bernd < address@hidden > a
écrit :

i'm using linphone 3.10.2 on windows 7 64bit. As video codecs, i just get
offered h.264 and vp8. Is there a possibility to use more codecs ? Like H263
... ?



Bernd Lentes

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