## Add audio tracks to a video

`client.stream.audioTracks.copy(stringidentifier, AudioTrackCopyParamsparams, RequestOptionsoptions?): Audio`

**post** `/accounts/{account_id}/stream/{identifier}/audio/copy`

Adds an additional audio track to a video using the provided audio track URL.

### Parameters

- `identifier: string`

  A Cloudflare-generated unique identifier for a media item.

- `params: AudioTrackCopyParams`

  - `account_id: string`

    Path param: The account identifier tag.

  - `label: string`

    Body param: A string to uniquely identify the track amongst other audio track labels for the specified video.

  - `url?: string`

    Body param: An audio track URL. The server must be publicly routable and support `HTTP HEAD` requests and `HTTP GET` range requests. The server should respond to `HTTP HEAD` requests with a `content-range` header that includes the size of the file.

### Returns

- `Audio`

  - `default?: boolean`

    Denotes whether the audio track will be played by default in a player.

  - `label?: string`

    A string to uniquely identify the track amongst other audio track labels for the specified video.

  - `status?: "queued" | "ready" | "error"`

    Specifies the processing status of the video.

    - `"queued"`

    - `"ready"`

    - `"error"`

  - `uid?: string`

    A Cloudflare-generated unique identifier for a media item.

### Example

```node
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

const audio = await client.stream.audioTracks.copy('ea95132c15732412d22c1476fa83f27a', {
  account_id: '023e105f4ecef8ad9ca31a8372d0c353',
  label: 'director commentary',
});

console.log(audio.uid);
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "default": true,
    "label": "director commentary",
    "status": "queued",
    "uid": "ea95132c15732412d22c1476fa83f27a"
  }
}
```