[asterisk-bugs] [JIRA] (ASTERISK-27351) iLBC Codec Mismatch

[Rusty Newton (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-27351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rusty Newton updated ASTERISK-27351:
------------------------------------

    Assignee: Luke Escude
      Status: Waiting for Feedback  (was: Triage)

You've provided pretty much everything we need, one other thing would be the basic configurations used to reproduce so we can be sure that we configure things exactly.

Often we are told that an issue is easy to reproduce, then we can't reproduce and after the fact we have to ask for configurations, so we try to get them ahead of time.

> iLBC Codec Mismatch
> -------------------
>
>                 Key: ASTERISK-27351
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27351
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>    Affects Versions: 15.0.0
>         Environment: x64 CentOS
>            Reporter: Luke Escude
>            Assignee: Luke Escude
>         Attachments: one-way-20-20-ast20.pcap, one-way-matched-30-30-ast20.pcap, two-way-30-30-ast20.pcap, two-way-mismatched-20-30-ast20.pcap
>
>
> Asterisk, when set to use iLBC, has 2 issues:
> 1. The INVITE SDP from Asterisk always contains 20ms frame size, regardless if ilbc is set in asterisk as ilbc:30 or ilbc:20
> 2. Asterisk always sends 30ms frames regardless of what was negotiated/set in pjsip.conf
> Attached are 4 packet captures:
> [^one-way-matched-30-30-ast20.pcap] is a one-way audio example where Asterisk is configured to use ilbc:30, but offers 20 in the SDP, and the phone uses 20.
> [^two-way-mismatched-20-30-ast20.pcap] is a two-way audio example where Asterisk is configured to use ilbc:30, but offers 20 in the SDP, and the phone uses 30 (therefore, 2-way audio).
> [^two-way-30-30-ast20.pcap] is a two-way audio example where Asterisk is configured to use ilbc:30, but offers 20 in the SDP, and the phone uses 30, (therefore, 2-way audio)
> [^one-way-20-20-ast20.pcap] is a one-way audio example where Asterisk is configured to use ilbc:20, offers 20 in the SDP, and phone is configured to use 20 (but it's still one-way audio because Asterisk is actually sending 30).
> Let me know if you need me to do more testing, it's 100% repeatable. 



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