[Bug 28269] New: sip calls garbled (PCMu/a)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28269

           Summary: sip calls garbled (PCMu/a)
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: sofiasip
        AssignedTo: mikhail.zabaluev at nokia.com
        ReportedBy: ericdrex at gmail.com
         QAContact: telepathy-bugs at lists.freedesktop.org


I use Gizmo service with Google Voice. Twinkle is my benchmark SIP client,
since I've found it to be very reliable compared to other clients available in
the Ubuntu repos, especially "on the go" connected to random NATed wireless
access points.

I would like to use Telepathy/Farsight/Empathy for SIP calls since it
integrates well with the Gnome desktop and unifies my realtime communications.
In previous releases SIP registration and call connection were broken, but now
these issues are resolved.

Unfortunately, audio during calls is garbled (syllables seem to appear out of
order, drop etc), while in Twinkle with the exact same setup, audio is solid.
I've tested on a variety of networks, including both fast, public IP
connections and behind NAT, with the same results: Twinkle voice quality is
solid, Empathy voice quality is unusably glitchy.

The empathy log and twinkle log both show the codec negotiated as PCMU/A.

Since this is a quality issue, not one that is easily traced, I would suggest
other interested users test with both Empathy/sofiasip and Twinkle (or other
solid client) and post results.

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