# Asynchronous playback (/en/api-reference/api-ref/broadcast-streaming/asynchronous-playback)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

Asynchronous playback refers to purposely setting a time lag between the playback screen seen by the user and the live stream.

<CalloutContainer type="info">
  <CalloutDescription>
    Currently, the asynchronous playback function only supports [Push CDN mode](/en/realtime-media/rtc/get-started-sdk).
  </CalloutDescription>
</CalloutContainer>

## Set a time lag

Sets a time lag for the specified live stream.

### HTTP request

```bash
PATCH https://api.agora.io/v1/projects/{appid}/fls/entry_points/{entry_point}/admin/delayed_streams/{stream_name}
```

#### Path parameter

| Parameter     | Type   | Description                                        |
| :------------ | :----- | :------------------------------------------------- |
| `appid`       | String | Required. The App ID retrieved from Agora Console. |
| `entry_point` | String | Required. The entry point name.                    |
| `stream_name` | String | Required. The stream name.                         |

#### Request body

The request body is in the JSON Object type, and contains the following fields:

| Field   | Type    | Description                                                     |
| :------ | :------ | :-------------------------------------------------------------- |
| `delay` | Integer | Required. The time lag in seconds, with a maximum value of 600. |

### HTTP response

If the returned HTTP status code is 200, the request is successful.

If the returned HTTP status code is not 200, the request fails. You can refer to the [HTTP status code ](#http-code)for possible reasons.

### Example

**Request line**

```bash
PATCH https://api.agora.io/v1/projects/{your_appid}/fls/entry_points/live/admin/delayed_streams/{stream_name} HTTP/1.1
```

**Response line**

```bash
HTTP/1.1 200 OK
```

## Cancel the time lag

Cancels the time lag for the specified live stream.

### HTTP request

```bash
DELETE https://api.agora.io/v1/projects/{appid}/fls/entry_points/{entry_point}/admin/delayed_streams/{stream_name}
```

#### Path parameter

| Parameter     | Type   | Description                                        |
| :------------ | :----- | :------------------------------------------------- |
| `appid`       | String | Required. The App ID retrieved from Agora Console. |
| `entry_point` | String | Required. The entry point name.                    |
| `stream_name` | String | Required. The stream name.                         |

### HTTP response

If the returned HTTP status code is 200, the request is successful.

If the returned HTTP status code is not 200, the request fails. You can refer to the [HTTP status code ](#http-code)for possible reasons.

### Example

**Request line**

```bash
DELETE https://api.agora.io/v1/projects/{your_appid}/fls/entry_points/live/admin/delayed_streams/{stream_name} HTTP/1.1
```

**Response line**

```bash
HTTP/1.1 200 OK
```

<a name="http-code" />

## HTTP status code

| Status code | Description                                                                                                                                              |
| :---------- | :------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 200         | The request succeeds.                                                                                                                                    |
| 400         | The parameter is invalid, for example the `appid` or the `entry_point` is empty, or the `region` parameter value is invalid.                             |
| 401         | Unauthorized (the customer ID and the customer secret do not match).                                                                                     |
| 404         | The server cannot find the resource according to the request, which means the requested entry point does not exist or the requested URI path is invalid. |
| 500         | An internal error occurs in the server, so the server is not able to complete the request.                                                               |
| 504         | An internal error occurs in the server. The gateway or the proxy server did not receive a timely request from the remote server.                         |