Mergecap (Wireshark) 4.2.4 (v4.2.4rc0-1-g9dbb5482ef05) Merge two or more capture files into one. See https://www.wireshark.org for more information. Usage: mergecap [options] -w |- [ ...] Output: -a concatenate rather than merge files. default is to merge based on frame timestamps. -s truncate packets to bytes of data. -w |- set the output filename to or '-' for stdout. -F set the output file type; default is pcapng. an empty "-F" option will list the file types. -I set the merge mode for Interface Description Blocks; default is 'all'. an empty "-I" option will list the merge modes. Miscellaneous: -h, --help display this help and exit. -V verbose output. -v, --version print version information and exit.