import { type TranscribeSegment } from "../../../schemas/index";
export interface WhisperAddonSegment {
    text: string;
    start?: number;
    end?: number;
    toAppend?: boolean;
    id?: number;
}
/**
 * Normalize a native whisper-addon segment to the SDK-level `TranscribeSegment`
 * shape exposed to callers: seconds → milliseconds, `toAppend` → `append`,
 * and defaults for optional fields.
 */
export declare function toTranscribeSegment(chunk: WhisperAddonSegment): TranscribeSegment;
/**
 * Guard used by transcription ops when the caller opts into `metadata: true`.
 * Only the whisper engine emits per-segment metadata; any other engine
 * requesting metadata is rejected with `TranscriptionFailedError`.
 */
export declare function assertMetadataSupported(modelId: string, engineType: string, metadata: boolean | undefined): void;
//# sourceMappingURL=transcribe-metadata.d.ts.map