import type { ArgList, CodecState, CommandLike, FilterSpec, LinesRing } from './types.js';
type WhichCallback = (err: null, path: string) => void;
declare function copy<S extends Record<string, unknown>>(source: S, dest: Record<string, unknown>): void;
declare function makeArgList(): ArgList;
declare function makeFilterStrings(filters: (string | FilterSpec)[]): string[];
declare function whichCached(name: string, callback: WhichCallback): void;
declare function timemarkToSeconds(timemark: string | number): number;
declare function extractCodecData(command: CommandLike, stderrLine: string, codecsObject: CodecState): boolean;
declare function formatNumberForCall(value: number): string;
declare function extractProgress(command: CommandLike, stderrLine: string): void;
declare function extractError(stderr: string): string;
declare function makeLinesRing(maxLines: number): LinesRing;
declare const utils: {
    isWindows: boolean;
    streamRegexp: RegExp;
    copy: typeof copy;
    args: typeof makeArgList;
    makeFilterStrings: typeof makeFilterStrings;
    which: typeof whichCached;
    timemarkToSeconds: typeof timemarkToSeconds;
    formatNumberForCall: typeof formatNumberForCall;
    extractCodecData: typeof extractCodecData;
    extractProgress: typeof extractProgress;
    extractError: typeof extractError;
    linesRing: typeof makeLinesRing;
};
export = utils;
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