On Fri, Jul 10, 2009 at 10:16:10AM +1000, Ian Schorr wrote:
> 
>    I forgot to mention that if you don't want tshark to actually display any
>    packets (just the stats table), you'll want to feed it a "display filter"
>    that matches no packets.  So you could do something like:
> 
>    tshark -r <file> -R "not frame" -z io,stat,1,"tcp.port==20 or
>    tcp.port==21"  (every packet matches the filter "frame" so a display
>    filter of "not frame" basically says "display any packets")
Actually, that's what the -q option is for :-)
(ie tshark -r <file> -q -z io,stat,1,<filter> )
Cheers,
Sake