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

[Luke Escude (JIRA)]

Luke Escude created ASTERISK-27351:
--------------------------------------

             Summary: 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


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-match-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. 



--
This message was sent by Atlassian JIRA
(v6.2#6252)