import { FfmpegFailedError, FfmpegTimeoutError, type FfmpegRunOptions } from './ffmpeg.js';
export type AudioEncodeOptions = FfmpegRunOptions;
export { FfmpegFailedError as AudioEncodeFailedError, FfmpegTimeoutError as AudioEncodeTimeoutError };
/** Encoded (transcoder-backed) speech formats, distinct from native wav/pcm. */
export type EncodedSpeechFormat = 'mp3' | 'opus' | 'aac' | 'flac';
export declare const ENCODED_SPEECH_FORMATS: readonly EncodedSpeechFormat[];
/** Builds the full ffmpeg arg list for encoding WAV → `format`. Exported for unit tests. */
export declare function speechEncodeArgs(format: EncodedSpeechFormat): string[];
/** Encode the route's WAV buffer into `format` via the system ffmpeg binary. */
export declare function transcodeWav(input: Buffer, format: EncodedSpeechFormat, opts?: AudioEncodeOptions): Promise<Buffer>;
export { probeFfmpegAvailable } from './ffmpeg.js';
//# sourceMappingURL=audio-transcode.d.ts.map