> **Experimental**
>
> `@aws-cdk/aws-medialive-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# SmartSubtitleSourceOptions

Options for a smart subtitle caption source (AI-generated subtitles via Elemental Inference).

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/caption-selector.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-medialive-alpha/lib/caption-selector.ts#L218)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as medialive_alpha from '@aws-cdk/aws-medialive-alpha';

declare const captionSynchronizationMode: medialive_alpha.CaptionSynchronizationMode;
const smartSubtitleSourceOptions: medialive_alpha.SmartSubtitleSourceOptions = {
  captionSynchronizationMode: captionSynchronizationMode,
  inferenceFeedOutput: 'inferenceFeedOutput',
};
```

## Properties

- `captionSynchronizationMode`: [CaptionSynchronizationMode](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.CaptionSynchronizationMode.html) — Controls whether MediaLive delays video to synchronize captions with audio and video output.

  **Default:** service default

- `inferenceFeedOutput`: string — The name of the Elemental Inference feed output that provides the subtitles.

  **Default:** service default