/**
 * Audio transcription (Whisper or compatible).
 *
 * The `openai` SDK is a peer dep — we import `toFile` only when used.
 */
export interface TranscriberOptions {
    client: AudioClient;
    model?: string;
    filename?: string;
}
export interface AudioClient {
    audio: {
        transcriptions: {
            create(body: {
                file: unknown;
                model: string;
            }): Promise<{
                text?: string;
            }>;
        };
    };
}
export declare class Transcriber {
    private readonly client;
    private readonly model;
    private readonly filename;
    constructor({ client, model, filename }: TranscriberOptions);
    transcribe(audioStream: ReadableStream | null): Promise<string | null>;
}
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