# Interface (CameraOutput)
<!--Kit: Camera Kit-->
<!--Subsystem: Multimedia-->
<!--Owner: @qano-->
<!--SE: @leo_ysl-->
<!--TSE: @xchaosioda-->

> **NOTE**
>
> The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

CameraOutput implements output information used in [Session](arkts-apis-camera-Session.md). It is the base class of **output**.

## Modules to Import

```ts
import { camera } from '@kit.CameraKit';
```

## release

release(callback: AsyncCallback\<void\>): void

Releases output resources. This API uses an asynchronous callback to return the result.

**Atomic service API**: This API can be used in atomic services since API version 19.

**System capability**: SystemCapability.Multimedia.Camera.Core

**Parameters**

| Name     | Type                 | Mandatory| Description                |
| -------- | -------------------- | ---- | ------------------- |
| callback | AsyncCallback\<void\> | Yes  | Callback used to return the result. If the operation fails, an error code defined in [CameraErrorCode](arkts-apis-camera-e.md#cameraerrorcode) is returned.|

**Error codes**

For details about the error codes, see [Camera Error Codes](errorcode-camera.md).

| ID        | Error Message       |
| --------------- | --------------- |
| 7400201                |  Camera service fatal error.                           |

**Example**

```ts
import { BusinessError } from '@kit.BasicServicesKit';

function releasePreviewOutput(previewOutput: camera.PreviewOutput): void {
  previewOutput.release((err: BusinessError) => {
    if (err) {
      console.error(`Failed to release the Preview output instance ${err.code}`);
      return;
    }
    console.info('Callback invoked to indicate that the preview output instance is released successfully.');
  });
}

function releaseVideoOutput(videoOutput: camera.VideoOutput): void {
  videoOutput.release((err: BusinessError) => {
    if (err) {
      console.error(`Failed to release the video output instance ${err.code}`);
      return;
    }
    console.info('Callback invoked to indicate that the video output instance is released successfully.');
  });
}
```

## release

release(): Promise\<void\>

Releases output resources. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 19.

**System capability**: SystemCapability.Multimedia.Camera.Core

**Return value**

| Type           | Description                    |
| -------------- | ----------------------- |
| Promise\<void\> | Promise that returns no value.|

**Error codes**

For details about the error codes, see [Camera Error Codes](errorcode-camera.md).

| ID        | Error Message       |
| --------------- | --------------- |
| 7400201                |  Camera service fatal error.                           |

**Example**

```ts
import { BusinessError } from '@kit.BasicServicesKit';

function releasePreviewOutput(previewOutput: camera.PreviewOutput): void {
  previewOutput.release().then(() => {
    console.info('Promise returned to indicate that the preview output instance is released successfully.');
  }).catch((error: BusinessError) => {
    console.error(`Failed to preview output release, error code: ${error.code}`);
  });
}

function releaseVideoOutput(videoOutput: camera.VideoOutput): void {
  videoOutput.release().then(() => {
    console.info('Promise returned to indicate that the video output instance is released successfully.');
  }).catch((error: BusinessError) => {
    console.error(`Failed to video output release, error code: ${error.code}`);
  });
}
```