[asterisk-bugs] [JIRA] (ASTERISK-21492) 1.8.21 RTP packetization 30ms but Asterisk sends 20ms40ms etc

[i2045 (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=205752#comment-205752 ] 

i2045 commented on ASTERISK-21492:
----------------------------------

Files are attached.



The test setup:

   192.168.178.1 Endpoint (SIP client)
   192.168.178.21 Asterisk 1.8.21.0
   192.168.178.20 Endpoint (other Asterisk machine playing demo)

   I have configured the Asterisk 1.8.21.0 machine with a packetization of 20ms with 192.168.178.1 and a packetization of 30ms with 192.168.178.20.
   So i would expect Asterisk 1.8.21.0 to convert between the two legs (20ms and 30ms).



The result:

      192.168.178.1 -> 30ms30ms etc. -> 192.168.178.21 -> 30ms0ms30ms20ms0ms ??? -> 192.168.178.20

   reverse direction:

      192.168.178.20 -> 20ms20ms etc. -> 192.168.178.21 -> 20ms40ms20ms40ms etc. -> 192.168.178.1



I would expect:

      192.168.178.1 -> 30ms30ms etc. -> 192.168.178.21 -> 20ms20ms etc. -> 192.168.178.20

   reverse direction:

      192.168.178.20 -> 20ms20ms etc. -> 192.168.178.21 -> 30ms30ms etc. -> 192.168.178.1
                
> 1.8.21 RTP packetization 30ms but Asterisk sends 20ms40ms etc
> -------------------------------------------------------------
>
>                 Key: ASTERISK-21492
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21492
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General, Resources/res_rtp_asterisk
>    Affects Versions: 1.8.21.0
>            Reporter: i2045
>            Assignee: i2045
>         Attachments: 1_8_21_0_packetization_extensions.conf, 1_8_21_0_packetization.pcap, 1_8_21_0_packetization_rtp.conf, 1_8_21_0_packetization_sip.conf, 1_8_21_0_packetization.txt
>
>
> I use the same configuration as ASTERISK-20976.
> User A sends RTP each 20ms. User B has packetization set to :30.
> I now see: A -> 20ms20ms20ms20ms20ms20ms -> Asterisk -> 20ms40ms20ms40ms -> B.
> I would expect: A -> 20ms20ms20ms20ms20ms20ms -> Asterisk -> 30ms30ms30ms30ms -> B.
> Can i make Asterisk send RTP packets each 30 ms?

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