{ "tempo", required_argument, 0, M4AF_TAG_TEMPO },
{ "tag", required_argument, 0, OPT_SHORT_TAG },
{ "long-tag", required_argument, 0, OPT_LONG_TAG },
{ "tempo", required_argument, 0, M4AF_TAG_TEMPO },
{ "tag", required_argument, 0, OPT_SHORT_TAG },
{ "long-tag", required_argument, 0, OPT_LONG_TAG },