## Add audio tracks to a video

`client.Stream.AudioTracks.Copy(ctx, identifier, params) (*Audio, error)`

**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`

  - `AccountID param.Field[string]`

    Path param: The account identifier tag.

  - `Label param.Field[string]`

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

  - `URL param.Field[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

- `type Audio struct{…}`

  - `Default bool`

    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 AudioStatus`

    Specifies the processing status of the video.

    - `const AudioStatusQueued AudioStatus = "queued"`

    - `const AudioStatusReady AudioStatus = "ready"`

    - `const AudioStatusError AudioStatus = "error"`

  - `UID string`

    A Cloudflare-generated unique identifier for a media item.

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/option"
  "github.com/cloudflare/cloudflare-go/stream"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  audio, err := client.Stream.AudioTracks.Copy(
    context.TODO(),
    "ea95132c15732412d22c1476fa83f27a",
    stream.AudioTrackCopyParams{
      AccountID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
      Label: cloudflare.F("director commentary"),
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", 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"
  }
}
```