{ "output", required_argument, 0, 'o'},
{ "valid-from", required_argument, 0, 'f'},
{ "valid-to", required_argument, 0, 't'},
+ { "valid-duration", required_argument, 0, 'd'},
{ "certificate", required_argument, 0, 'A' },
{ "cinema", required_argument, 0, 'c' },
{ "cinemas", no_argument, 0, 'B' },