Re: Capture start time

[Guy Harris <guy () alum mit edu>]

On Mar 23, 2010, at 10:30 AM, specop () gmx ch wrote:

> As far as I understood it, Wireshark sets the capture start time to the moment the first packet arrives, right? So if 
> I start the capture at time t and the first packet arrives at t+5s, the capture's start time will be initialized at 
> t+5 (time 0.000s). Correct?

I'm not sure Wireshark reports any notion of a capture start time.  If you display packet time stamps as "seconds since 
first packet", then, obviously, the first packet will have a time stamp of 0 seconds.

> Is there a way to determine the real capture start time (not the arrival of the first packet)? E.g. from a pcap file.

It's definitely *not* possible with a pcap file, as a pcap file doesn't store the time a capture started - it only 
stores the time stamps of packets in the file.
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