No Jitter, MOS, RTT on LTS 13.5.1.1-1

Giovanni Jose

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Nov 6, 2025, 11:13:19 AMNov 6

to Sipwise rtpengine

Hello Richard

In the latest version 13.5.1.1 LTS of RTPengine is not generating Jitter, MOS, RTT statistics in the JSON format (I still can see the calculation on the logs), but it was working when I had it with RTPengine 12.5.1.27. I have these 2 examples of the comparison between the working one and the faulty one:

Working version rtpengine 12.5.1.27-1~bpo12+1:

{
"timestamp": 1762404405.797779,
"call_id": "2lauv3tH2tJvMpvJaDNfaNflN.VBBh8c",
"legs": [
{
"tag": "MX2Qv0N91vhOalefHoBnipqbrstaNBpE",
"label": "customer",
"medias": [
{
"media_index": 1,
"type": "audio",
"interface": "default",
"protocol": "RTP/AVP",
"status": "sendrecv",
"address": "1.0.0.30",
"port": 10022,
"ingress": {
"bytes": 430000,
"packets": 2500,
"errors": 0,
"SSRC": [
{
"SSRC": 1256548247,
"codec": "PCMU",
"clock_rate": 8000,
"codec_params": "",
"codec_format": "",
"metrics": {
"packets": 2500,
"bytes": 430000,
"lost": 0,
"duplicates": 0,
"packets_per_second": 50.0,
"bytes_per_second": 8600.0,
"lost_per_second": 0.0,
"duplicates_per_second": 0.0,
"jitter": 0.0,
"MOS": 4.4,
"RTT": 1.78,
"RTT_leg": 0.493
}
}
]
},
"egress": {
"bytes": 428452,
"packets": 2491,
"errors": 0,
"SSRC": [
{
"SSRC": 346597425,
"codec": "PCMU",
"clock_rate": 8000,
"codec_params": "",
"codec_format": "",
"metrics": {
"packets": 2491,
"bytes": 428452,
"lost": 0,
"duplicates": 0,
"packets_per_second": 50.0,
"bytes_per_second": 8600.0,
"lost_per_second": 0.0,
"duplicates_per_second": 0.0,
"jitter": 0.0
}
}
]
}
}
]
},
{
"tag": "46i6BO7rj2N5IT6a62pN7GQoO2ukmv3I",
"label": "vendor",
"medias": [
{
"media_index": 1,
"type": "audio",
"interface": "default",
"protocol": "RTP/AVP",
"status": "sendrecv",
"address": "1.0.0.0",
"port": 10050,
"ingress": {
"bytes": 428452,
"packets": 2491,
"errors": 0,
"SSRC": [
{
"SSRC": 346597425,
"codec": "PCMU",
"clock_rate": 8000,
"codec_params": "",
"codec_format": "",
"metrics": {
"packets": 2491,
"bytes": 428452,
"lost": 0,
"duplicates": 0,
"packets_per_second": 50.0,
"bytes_per_second": 8600.0,
"lost_per_second": 0.0,
"duplicates_per_second": 0.0,
"jitter": 0.0,
"MOS": 4.4,
"RTT": 1.492,
"RTT_leg": 0.999
}
}
]
},
"egress": {
"bytes": 430000,
"packets": 2500,
"errors": 0,
"SSRC": [
{
"SSRC": 1256548247,
"codec": "PCMU",
"clock_rate": 8000,
"codec_params": "",
"codec_format": "",
"metrics": {
"packets": 2500,
"bytes": 430000,
"lost": 0,
"duplicates": 0,
"packets_per_second": 50.0,
"bytes_per_second": 8600.0,
"lost_per_second": 0.0,
"duplicates_per_second": 0.0,
"jitter": 0.0
}
}
]
}
}
]
}
]
}

The faulty one LTS rtpengine LTS 13.5.1.1-1~bpo12+1

{
"timestamp": 1762443952.82095,
"call_id": "j7LOiA3ExtjYeJonKtCk6Alth0HOih3w",
"legs": [
{
"tag": "6e0aTSVIJkno.tY8soVcFDX5MGcOCjju",
"label": "customer",
"medias": [
{
"media_index": 1,
"type": "audio",
"interface": "default",
"protocol": "RTP/AVP",
"status": "sendrecv",
"ingress": {
"bytes": 515828,
"packets": 2999,
"errors": 0
},
"egress": {
"bytes": 515828,
"packets": 2999,
"errors": 0
},
"address": "1.0.0.0",
"port": 10058,
"endpoint_address": "1.0.0.0",
"endpoint_port": 13510,
"transcoding": false
}
]
},
{
"tag": "rV180dRlrSSqc9MH2TSq4.Q7KRkb1r-8",
"label": "vendor",
"medias": [
{
"media_index": 1,
"type": "audio",
"interface": "default",
"protocol": "RTP/AVP",
"status": "sendrecv",
"ingress": {
"bytes": 515828,
"packets": 2999,
"errors": 0
},
"egress": {
"bytes": 515828,
"packets": 2999,
"errors": 0
},
"address": "10.0.0.0",
"port": 10004,
"endpoint_address": "10.0.0.0",
"endpoint_port": 10326,
"transcoding": false
}
]
}
]
}

We are maintaining the same configurations in both versions.

Richard Fuchs

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Nov 7, 2025, 11:56:27 AMNov 7

to rtpe...@googlegroups.com

Thanks for the report, it has been fixed and backported. Hotfix point release is pending.

Cheers

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Giovanni Jose

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Nov 10, 2025, 11:15:59 AMNov 10

to Sipwise rtpengine

Thanks for the response, Richard. Do you know when the fix is going to be available in a new version? And is the fix in the repo? just want to know if there's a way to have the fix

Richard Fuchs

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Nov 10, 2025, 11:28:00 AMNov 10

to rtpe...@googlegroups.com

On 10/11/2025 12.15, Giovanni Jose wrote:

Thanks for the response, Richard. Do you know when the fix is going to be available in a new version? And is the fix in the repo? just want to know if there's a way to have the fix

For the LTS version you're looking for 13.5.1.2. It's already committed to git and prebuilt packages should become available by tomorrow.

Cheers

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