export type CleanupMode = "denoise" | "denoise-strong" | "rnnoise" | "dehum" | "deess";
export interface CleanupOptions {
    /** Mains frequency for `dehum`. Default 50 (most of the world); use 60 for North America. */
    mainsHz?: 50 | 60;
    /** Path to an `arnndn` model (.rnnn). Required for `rnnoise` mode. */
    rnnoiseModel?: string;
    signal?: AbortSignal;
}
/**
 * Build the ffmpeg `-af` filter string for a cleanup mode. Pure function so
 * tests can verify the chain without spawning ffmpeg.
 */
export declare function buildCleanupFilter(mode: CleanupMode, opts?: CleanupOptions): string;
/** Run a single cleanup pass on an audio/video file. Video stream is copied. */
export declare function applyCleanup(inputPath: string, outputPath: string, mode: CleanupMode, opts?: CleanupOptions): Promise<void>;
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