METADATA_DELETE   102 libavfilter/f_metadata.c     {   "delete", "delete metadata",     0,              AV_OPT_TYPE_CONST,  {.i64 = METADATA_DELETE }, 0, 0, FLAGS, "mode" }, \
METADATA_DELETE   210 libavfilter/f_metadata.c     if (!s->key && s->mode != METADATA_PRINT && s->mode != METADATA_DELETE) {
METADATA_DELETE   348 libavfilter/f_metadata.c     case METADATA_DELETE: