export interface DownloadMetadata {
    model?: string;
    width?: number;
    height?: number;
    fps?: number;
    seed?: number | string;
    duration?: number;
}
export type DownloadMediaType = 'image' | 'video' | 'audio' | 'archive';
export declare function slugify(name: string): string;
export declare function extensionFromMimeType(mimeType: string | undefined): string | null;
export declare function extensionFromUrl(url: string | undefined): string | null;
export declare function normalizeDownloadExtension(extension: string | null | undefined, mediaType?: DownloadMediaType): string | null;
export declare function defaultExtensionForDownloadType(type: 'restored' | 'original' | 'video' | 'styled' | 'audio'): string;
export declare function replaceFilenameExtension(filename: string, extension: string | null | undefined): string;
export declare function buildDownloadFilename(originalFileName: string | undefined, index?: number, type?: 'restored' | 'original' | 'video' | 'styled' | 'audio', metadata?: DownloadMetadata, extension?: string | null): string;
export declare function buildZipFilename(originalFileName?: string): string;
//# sourceMappingURL=downloadFilename.d.ts.map