import type { Logging } from "homebridge";
/** GitHub release asset name for the standalone yt-dlp binary, per platform. */
export declare function ytDlpAssetName(platform?: NodeJS.Platform, arch?: NodeJS.Architecture): string | undefined;
/** A binary older than this is considered stale and gets re-downloaded. */
export declare function isStale(mtimeMs: number, nowMs?: number): boolean;
/**
 * Self-managed yt-dlp binary: downloaded into Homebridge's storage dir and refreshed
 * when older than 30 days (stale copies break against YouTube within months).
 * An explicit ytDlpPath override disables all self-management.
 */
export declare class YtDlp {
    private readonly log;
    private readonly overridePath;
    readonly managedPath: string;
    private refreshInFlight;
    constructor(log: Logging, storagePath: string, overridePath: string | undefined);
    /** Download/refresh the managed binary if missing or stale. Never rejects. */
    ensureFresh(): Promise<void>;
    /**
     * Resolve the currently-live video id for a channel live page.
     * Returns undefined when the channel is not live or yt-dlp is unavailable
     * (both logged; neither throws).
     */
    resolveLiveVideoId(url: string, prefix: string): Promise<string | undefined>;
    /** Path to a usable binary, or undefined (logged) if none exists yet. */
    private binaryPath;
    private refresh;
    private download;
}
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