Torch output and line parsing problem

Getting info from my Mik via ssh:

 ssh user@192.168.1.1 '/tool torch interface=ether1 freeze-frame-interval=2 duration=3'

and then dump to local disk.

And there is output, that inconveniet to parse (line parsing with python script), because every time the torch data differs (4 lines with data one time, 2 lines other time)

        TX         RX TX-PACKETS RX-PACKETS
      0bps       0bps          0          0
      0bps       0bps          0          0

 164.2kbps  757.9kbps         88        196
 164.2kbps  757.9kbps         88        196



        TX         RX TX-PACKETS RX-PACKETS

 153.1kbps  697.1kbps         85        183
 153.1kbps  697.1kbps         85        183

To parse dump file i need concrete line numbers. Also, i have experimented with params “freeze-frame-interval” and “duration” (even without them) - no solution.
Could you give some advise how to make what i need?
If i chose worng topic - sorry. Thanks a lot!

do a packet sniffer?