7ciso popt

Usage: 7ciso {-c2/-z1 dec.iso enc.cso} or {-d <enc.cso >dec.iso}
  -c, --compress[=level]         1-9 (default 2) 7zip (fallback to zlib if 7z.dll/so isn't available)
  -z, --zopfli=numiterations     zopfli
  -t, --threshold=threshold      compression threshold (in %, 10-100)
  -d, --decompress               decompress

Help options:
  -?, --help                     Show this help message
      --                         Terminate options