export type MediaMetadata = import("./cdn-url.js").MediaMetadata;
export type ImageParams = import("./cdn-url.js").ImageParams;
export type ThumbnailEnv = {
    IMAGE_BASE_URL: string | URL;
    VIDEO_BASE_URL?: string | URL;
    ENVIRONMENT_NAME?: string;
};
/**
 * @param {MediaMetadata | null | undefined} metadata
 * @param {ThumbnailEnv} env
 * @param {ImageParams} [params]
 * @returns {string}
 */
export function getThumbnailUrl(metadata: MediaMetadata | null | undefined, env: ThumbnailEnv, params?: ImageParams): string;