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Re: [Linphone-developers] DTX / VAD for Speex in linphone

From: Johan Pascal
Subject: Re: [Linphone-developers] DTX / VAD for Speex in linphone
Date: Mon, 8 Aug 2016 22:41:34 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.1.0


speex codec directly manages the VAD/DTX as long as you use vbr=on or vbr=vad in your fmtp parameter, can you check these parameter is correctly set in the SDP INVITE and peer response to the invite ? During silence you shall have fewer and smaller packets.

By the way, speex is now superseded by opus, why do you need to use speex?



On 08/08/16 17:41, address@hidden wrote:
Hi list,

I don't know if developers are on the users list as well, so i would
like to ask almost the same question here again and i hope you don't
hold it against me:

I am trying to get VAD working in linphone, but i fail. Or maybe i
misunderstood the concept?

When i try to activate VAD (vbr=vad, vad=on) for Speex in the linphonerc
speech pauses don't result in fewer packets being sent. Only the RTP
payload is smaller during silence. Is this already VAD? Then i am
missing DTX i guess?

So, is there any possibility to use DTX in linphone, ideally together
with VAD?


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