Jitter/Mos/Rtt Results when no RTCP

[Eric tao]

Hello im using RTPEngine version12.0.1.1+0 to test Jitter/Mos/Rtt from a two sipp instances which do not send RTCP Traffic.

and the Mos/Jitter/Rtt Results are a bit odd (see picture attached).

are  there normal numbers expected because of not sending RTCP ?

Everything is on my local machine so i excpected the jitter to be very low and the mos at leat at 4

Thanks.

[Johan De Clercq]

How can you have jitter on local loopback. You should have > 4

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Van: rtpe...@googlegroups.com <rtpe...@googlegroups.com> namens Eric tao <taoe...@gmail.com>
Verzonden: Thursday, December 7, 2023 1:26:17 PM
Aan: rtpengine <rtpe...@googlegroups.com>
Onderwerp: Jitter/Mos/Rtt Results when no RTCP

 

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[Eric tao]

thats why im asking if those results are relevant without RTCP.

i launch rtpengine with --measure-rtp --mos=LQ flags and i use generate-RTCP asymmetric port-latching replace-origin replace-sdp-version replace-zero-address replace-session-connection ICE=remove flags for offer and answer.

[Richard Fuchs]

On 07/12/2023 07.26, Eric tao wrote:

Hello im using RTPEngine version12.0.1.1+0 to test Jitter/Mos/Rtt from a two sipp instances which do not send RTCP Traffic.

and the Mos/Jitter/Rtt Results are a bit odd (see picture attached).

are  there normal numbers expected because of not sending RTCP ?

Everything is on my local machine so i excpected the jitter to be very low and the mos at leat at 4

With your options jitter would be measured and should be accurate. Pull a Wireshark trace and compare the numbers if you think it's incorrect.

RTT is expected to be absent without RTCP.

Cheers