/// <reference types="node" />
import { FFmpegProgress } from './FFmpegProgress';
import { ChildProcess } from 'child_process';
import { Hook } from './Hookable';
import { Duration } from 'data-unit';
/**
 * @category composable/executors
 */
export declare enum FFmpegErrorDetector {
    VerboseError = 0,
    Fuzzy = 1,
    None = 2
}
/**
 * @category composable/executors
 */
export declare class FFmpegProcess {
    args: string[];
    process: ChildProcess;
    killed: boolean;
    errorDetector: FFmpegErrorDetector;
    onProgress: Hook<FFmpegProgress>;
    onOutputLine: Hook<string>;
    onEnd: Hook<void>;
    onError: Hook<Error>;
    protected errorMessages: string[];
    constructor(args: string[], errorDetector?: FFmpegErrorDetector);
    constructor(process: ChildProcess, errorDetector?: FFmpegErrorDetector);
    protected setup(duration?: number | string | Duration): void;
    start(duration?: number | string | Duration): void;
    pause(): void;
    resume(): void;
    kill(): void;
    wait(): Promise<void>;
}