import * as i0 from "@angular/core";
export declare class FilePreviewService {
    constructor();
    /**
     * Generate a preview URL for a file
     * @param file The file to generate a preview for
     * @returns A promise that resolves to a preview URL or null if preview is not possible
     */
    generatePreview(file: File): Promise<string | null>;
    private createImagePreview;
    private createVideoPreview;
    static ɵfac: i0.ɵɵFactoryDeclaration<FilePreviewService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FilePreviewService>;
}