import { FFmpeg as RootFFmpeg } from '../../libs/ffmpeg';
import { FFMessageLoadConfig } from '../../libs/ffmpeg/types';
/**
 * Singleton wrapper that initializes and manages the SDK's FFmpeg runtime.
 */
declare class FFmpeg {
    private static instance;
    private readonly ffmpeg;
    private coreURL;
    private wasmURL;
    private constructor();
    /**
     * Returns the shared FFmpeg wrapper instance.
     *
     * @returns The singleton FFmpeg wrapper.
     */
    static getInstance(): FFmpeg;
    /**
     * Loads the FFmpeg runtime from the supplied asset URLs.
     *
     * @param config FFmpeg core and WASM asset URLs.
     * @returns A promise that resolves after FFmpeg has been loaded.
     */
    initialize(config: FFMessageLoadConfig): Promise<boolean | undefined>;
    /**
     * Returns the underlying low-level FFmpeg instance.
     *
     * @returns The root FFmpeg instance.
     */
    getFFmpeg(): RootFFmpeg;
    /**
     * Returns the blob URL currently used for the FFmpeg core script.
     *
     * @returns The FFmpeg core URL.
     */
    getCoreURL(): string;
    /**
     * Returns the blob URL currently used for the FFmpeg WASM binary.
     *
     * @returns The FFmpeg WASM URL.
     */
    getWasmURL(): string;
    /**
     * Creates a separate low-level FFmpeg instance using the already loaded runtime assets.
     *
     * @returns A promise that resolves to a loaded FFmpeg instance, or `null` if loading fails.
     */
    createCustomInstance(): Promise<RootFFmpeg | null>;
    /**
     * Reloads the current FFmpeg instance using the stored runtime asset URLs.
     *
     * @returns A promise that resolves after FFmpeg has been reloaded.
     */
    reload(): Promise<void>;
    /**
     * Terminates the loaded FFmpeg instance and clears the singleton reference.
     *
     * @returns Nothing.
     */
    destroy(): void;
}
export { FFmpeg };