Re: how to analyze udp streams of skype chat

[Martin Visser <martinvisser99 () gmail com>]

Vineeth,

I think you have you work cut out for you. Skype is a proprietary,
unpublished protocol. Skype uses its own encryption scheme to boot.

As such you can't really tell a request from a response, (if there is
any), so I really think you won't get very far.

If this is the beginnings of some sort of research project into voice
quality of service, you probably want to concentrate on looking at
more open protocols.

Regards, Martin

MartinVisser99 () gmail com



On 29 January 2011 05:39, Vineeth <grittygeek () gmail com> wrote:
> Hello all,
>
> I have a capture file of a group chat in skype between three persons. I have
> to measure the latency of the packet from source to destination and for
> which I need their time stamps. I see that all my voice chat follow the udp
> protocol and I am not able to find their time stamps. I just find the
> arrival time of the packet and not the time at which the packet was send
> from the destination. I believe the udp message must be converted to RTP in
> order to do this analysis am I right? If not can some one tell me a better
> way?
>
> I am basically trying to collect a real time data of how users chat when it
> comes to a group conversation.
>
> I am attaching the captured file with this email. Any help is appreciated.
>
> Thank You
>
> Vineeth
>
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