[asterisk-bugs] [JIRA] (ASTERISK-21246) use of rtpkeepalive results in empty RTP packets with a marker bit set, plus a ULAW payload instead of CN

[Michael L. Young (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=205909#comment-205909 ] 

Michael L. Young commented on ASTERISK-21246:
---------------------------------------------

Peter,

Are you sure you are using only the second patch?  The pcap and the debug log look the same as if it was done with the first patch.

Also, just to clarify, has your audio distortion been fixed?

Thanks
                
> use of rtpkeepalive results in empty RTP packets with a marker bit set, plus a ULAW payload instead of CN
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-21246
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21246
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General, Resources/res_rtp_asterisk
>    Affects Versions: 1.8.17.0, 1.8.18.0, 1.8.19.0, 1.8.20.1
>         Environment: ubuntu 10.04
>            Reporter: Peter Katzmann
>         Attachments: asterisk-21246-rtp-cng-payload-error_1.8.diff, asterisk-21246-rtp-cng-payload-error_1.8_v2.diff, asterisk.conf.tar.gz, CallWithTranscoding, codecchange.0, codecchange.2, codecchange-24032013.bz2, codecchange-24032013-udp.pcap, codecchange.3, codecchange-filtered.pcap.gz, codecchange-patched, codecchange-patched.pcap, codecchange-patch-v2.log, codecchange-patch-v2.pcap, filtered1512-2-leg.pcap, filtered1512-2.pcap, myDebugLog, myDebugLog, negiot-switch, vanilla-trace.txt, ws-trace.txt
>
>
> See attached traces
> During call asterisk switches the negotiated codec (alaw) in the rtp to ulaw.
> If there is no renegotiation (like on my snom 720 sometimes), the user has a audible distortion.

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