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There appears to be 3 different file formats associated with the ".pcap" extension -- libpcap /w microsecond timestamps, libpcap /w nanosecond timestamps, and pcapng.

Is there an easy way to differentiate between them that is scriptable? Either cmd, powershell, or bash is acceptable.

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  • Which flavor of OS? Windows or Linux/Unix?
    – mdpc
    Jan 3, 2013 at 22:26
  • Preferably Windows, but if it works in cygwin that's good as well.
    – Chuu
    Jan 3, 2013 at 22:28

1 Answer 1

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You can verify the file type of pcap files with capinfos (e.g., simply enter capinfos your_capture.pcap in the command line).

capinfos is available with the WireShark distribution.

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