export declare const MAX_ASR_DURATION_SECONDS = 7200;
export declare const MAX_AUDIO_URL_CANDIDATES = 3;
export declare const MAX_AUDIO_REPRESENTATIONS = 256;
export declare const MAX_BACKUP_AUDIO_URLS = 8;
export interface PlaybackAudioCandidate {
    url: string;
    mimeType: string;
    bandwidth: number;
    representationId: number;
}
export interface PlaybackAudioSet {
    candidates: PlaybackAudioCandidate[];
    durationSeconds?: number;
}
type FetchPlayurl = (path: string, params: Record<string, string | number>, headers?: Record<string, string>, signal?: AbortSignal, maxResponseBytes?: number) => Promise<unknown>;
export declare function validatePlaybackMediaUrl(value: unknown): string;
export declare function parsePlaybackAudioSet(raw: unknown): PlaybackAudioSet;
export declare function getPlaybackAudioSet(bvid: string, cid: number, fetchPlayurl?: FetchPlayurl, signal?: AbortSignal): Promise<PlaybackAudioSet>;
export {};
//# sourceMappingURL=playback.d.ts.map