This functionality may be useful when capture files have been created by combining frames from more than one well-synchronised source, but the frames have not been combined in strict time order.
Reordercap writes the output capture file in the same format as the input capture file.
Reordercap is able to detect, read and write the same capture files that are supported by Wireshark. The input file doesn't need a specific filename extension; the file format and an optional gzip compression will be detected automatically. Near the beginning of the DESCRIPTION section of wireshark(1) or <https://www.wireshark.org/docs/man-pages/wireshark.html> is a detailed description of the way Wireshark handles this, which is the same way reordercap handles this.
It may make sense to move this functionality into editcap, or perhaps mergecap, in which case reordercap could be retired.
HTML versions of the Wireshark project man pages are available at: <https://www.wireshark.org/docs/man-pages>.
Original Author -------- ------ Martin Mathieson <martin.r.mathieson[AT]googlemail.com>