INV 1396377544.853700 should be 1396377544.085370000

From tcpdump on same system:  1396377544.085370 IP 192.168.0.1.sip > 192.168.0.2.sip: SIP, length: 1391

##</code><code>##

...
 Net::Pcap::loop( $pcap, -1, \&pkt_proc, "$filename" );
...
 my $tv_usec = $hdr->{'tv_usec'};
...