import { Logger } from 'pino';
import { AudioEncoding } from '../process/AudioEncoding.cjs';

declare const getTrackInfo: (path: string, logger?: Logger) => Promise<TrackInfo>;
declare function getTrackDuration(path: string, logger?: Logger): Promise<number>;
/**
 * CBR bitrates (bps) offered for MP3 output, roughly matching LAME -V9..-V0
 */
declare const MP3_CBR_BITRATES: readonly [64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000];
/**
 * Detect whether an MP3 file uses a variable bitrate
 * Does this by sampling the first few packets and checking if the sizes are different
 * CBR MP3 files will have the same packet size for the entire file
 *
 * Can't really trust the reported bitrate to tell CBR from VBR
 * LAME writes a Xing header carrying the *average* bitrate,
 * which ffprobe surfaces as a normal per-stream `bit_rate`,
 * so a VBR file looks identical to a CBR one by that measure.
 */
declare function isVbrMp3(path: string): Promise<boolean>;
declare function selectCbrBitrate(averageBitrate: number): number;
type TrackInfo = {
    filename: string;
    nbStreams: number;
    nbPrograms: number;
    formatName: string;
    formatLongName: string;
    startTime: number;
    duration: number;
    size: number;
    bitRate: number;
    probeScore: number;
    tags?: {
        majorBrand: string;
        minorVersion: string;
        compatibleBrands: string;
        title: string;
        track: string;
        album: string;
        genre: string;
        artist: string;
        encoder: string;
        mediaType: string;
    };
};
declare function splitFile(input: string, output: string, start: number, end: number, encoding?: AudioEncoding | null, signal?: AbortSignal | null, logger?: Logger | null): Promise<boolean>;
declare function transcodeFile(input: string, output: string, encoding?: AudioEncoding | null, signal?: AbortSignal | null, logger?: Logger | null): Promise<true | undefined>;

export { MP3_CBR_BITRATES, getTrackDuration, getTrackInfo, isVbrMp3, selectCbrBitrate, splitFile, transcodeFile };