export declare class ThumbnailGenerator {
    static generateThumbnail(file: File | Blob, options?: {
        width?: number;
        height?: number;
        maxWidth?: number;
        maxHeight?: number;
        timeout?: number;
    }): Promise<{
        thumbnailURL: string;
        thumbnail: Blob;
    }>;
    private static getObjectURL;
    private static createThumbFromCanvas;
    private static getCanvasOfImage;
    private static getCanvasOfVideo;
    private static calculateSize;
}