Wireshark-users: Re: [Wireshark-users] VOIP .raw problem: Can't save forward direction in a file:
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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Mon, 21 Feb 2011 12:11:43 -0800
On Feb 21, 2011, at 12:05 PM, nangergong wrote:

> so, are there any methods by which I can capture VOIP packets using "tcpdump" and convert .pcap files into .raw files?

Pass the "-s 65535" option to tcpdump or, in newer versions of tcpdump, "-s 0", so it doesn't throw out all but the first 68 or 96 bytes of the packet.