realtime and sychronized logging using tcpdump piped to logger

["Allan P. Magmanlac" <allan_(_dot_)_magmanlac_(_at_)_nrns_(_dot_)_ca>]

Hello,
  My openbsd 3.4 is configured to use packet filter (PF). As we know,  
pflogd writes to logs
to /var/log/pflog in binary format. Although, we can run tcpdump to see 
the logs in realtime
(# tcpdump -n -e -ttt -i pflog0), I would just prefer to use sylogd to 
write the logs in ascii format.

Part of what I have in syslog.cnf file
#for pflog in ascii format
local0.info                                             /var/log/pflog.txt

Now when I run:

#tcpdump -n -e -ttt -i pflog0 | logger -t pf -p local0.info

and telnet for instance to the box (which I block), plogd logs it fine 
in /var/log/pflog in binary format.
But when look at /var/log/pflog.txt,  the logs are not written to it.

The reason why I would like to have ascii log format is so that I do not 
have to run tcpdump -n -e -ttt -i pflog0
to see the current logs all the time and just look at the updated 
/var/log/pflog.txt whenever I need to.

Anybody has an idea on how to get this working.

Thanks.