pcapreader.py

import struct

f = open("onlyscanner.pcap", "rb")

of = open("packetdata.raw", "wb")

header = f.read(24)

while True:
    pheader = f.read(16)
    if len(pheader) == 0:
        break
        
    _, _, ilen, olen = struct.unpack("<IIII", pheader)
    packet = f.read(olen)
    
    of.write(packet[0x40:])
    
of.close()