[Telepathy] change speexenc settings for empathy

[Olivier Crête]

Hi,

On Fri, 2011-04-08 at 17:19 +0200, Alexey Fisher wrote:
> vbr=1
> # enable variable bitrate 

This may not work so well if you are near the limit of what the network
can do.. Sine you'll get drops when the bitrate gets higher...

> dtx=1
> # do not send any packets on silence
> # see Bug https://bugzilla.gnome.org/show_bug.cgi?id=646474

This gives you the impression that the bitrate is lower because you
don't send why not speaking. But it doesn't change the maximum bitrate
(when speaking) which is all that really matters for quality..

It will also break if WMM is enabled, in that case, the wireless router
only sends out frames when it receives one, so you have to send
continuously to keep on receiving.

> nframes=4
> # allow better compression and bigger packet size. It reduce network
> # traffic to 13 packets/sec. (with default options ~50 packets/sec).
> # the value bigger than 4 will introduce stuttering. 

This will increase latency, but should definitely improve compression.
But it gives less leeway to the jitterbuffer to do its thing. Maybe we
can increase to 2 which is already 40ms.. 4 is 80ms which is way too
much (the default jb is 100ms in Empathy).

-- 
Olivier Crête
olivier.crete at collabora.co.uk
Collabora Ltd
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