declare const removeSpecialCharacters: (str: string) => string;
declare const normalizeWhitespace: (text: string) => string;
declare const splitStringAtIndex: (arr: string[], index: number, x: number) => string[];
declare const insertStringAt: (str: string, index: number, toInsert: string) => string;
declare const safeDecodeURIComponent: (str: string) => string;
declare const removeBlankLines: (text: string) => string;
declare const addLineBreaks: (lineText: string, subtitleMaxWidth: number) => string;
export { addLineBreaks, removeBlankLines, insertStringAt, normalizeWhitespace, splitStringAtIndex, safeDecodeURIComponent, removeSpecialCharacters, };