export declare const useBufferUntilFirstFrame: ({ mediaRef, mediaType, onVariableFpsVideoDetected, pauseWhenBuffering, }: {
    mediaRef: React.RefObject<HTMLVideoElement | HTMLAudioElement>;
    mediaType: 'video' | 'audio';
    onVariableFpsVideoDetected: () => void;
    pauseWhenBuffering: boolean;
}) => {
    isBuffering: () => boolean;
    bufferUntilFirstFrame: (requestedTime: number) => void;
};