case AV_OPT_TYPE_SAMPLE_FMT: cp = N_("<sample_fmt>"); break;
case AV_OPT_TYPE_DURATION: cp = N_("<duration>"); break;
case AV_OPT_TYPE_COLOR: cp = N_("<color>"); break;
case AV_OPT_TYPE_SAMPLE_FMT: cp = N_("<sample_fmt>"); break;
case AV_OPT_TYPE_DURATION: cp = N_("<duration>"); break;
case AV_OPT_TYPE_COLOR: cp = N_("<color>"); break;