***

id: 94eaf980-f33e-4bab-abf8-b02da777a228
title: RoomSessionPlayback
position: 4
slug: /js/reference/video/room-session-playback
max-toc-depth: 3
----------------

Instances of this class allow you to control (e.g., pause, resume, stop) the playback inside a room session. You can obtain instances of this class by starting a playback from the desired [RoomSession](/docs/browser-sdk/v3/js/reference/video/room-session) (see [RoomSession.play](/docs/browser-sdk/v3/js/reference/video/room-session/play)).

## Properties

<ParamField path="endedAt" type="Date">
  End time, if available.
</ParamField>

<ParamField path="id" type="string" required={true}>
  Unique id for this playback.
</ParamField>

<ParamField path="position" type="number" required={true}>
  Current playback position, in milliseconds.
</ParamField>

<ParamField path="roomSessionId" type="string" required={true}>
  Id of the room session associated to this playback.
</ParamField>

<ParamField path="seekable" type="boolean" required={true}>
  Whether the seek functions ([seek](#seek), [forward](#forward), [rewind](#rewind)) can be used for this playback
</ParamField>

<ParamField path="startedAt" type="Date" required={true}>
  Start time, if available.
</ParamField>

<ParamField path="state" type="&#x22;paused&#x22; | &#x22;completed&#x22; | &#x22;playing&#x22;" required={true}>
  Current state of the playback.
</ParamField>

<ParamField path="url" type="string" required={true}>
  Url of the file reproduced by this playback.
</ParamField>

<ParamField path="volume" type="number" required={true}>
  Audio volume at which the playback file is reproduced.
</ParamField>

## Methods

### forward

▸ **forward**(`offset`): `Promise<void>`

Seeks the current playback forward by the specified offset.

#### Parameters

<ParamField path="offset" type="number">
  Relative number of milliseconds to seek forward from the current position. Defaults to 5000 (5 seconds).
</ParamField>

#### Returns

`Promise<void>`

#### Permissions

* `room.playback.seek` or the more permissive `room.playback`

You need to specify the permissions when [creating the Video Room Token](/docs/apis/video/room-tokens/create-room-token) on the server side.

#### Example

```javascript
const playback = await roomSession.play({ url: "rtmp://example.com/foo" });
await playback.forward(5000); // 5 seconds
```

***

### pause

▸ **pause**(): `Promise<void>`

Pauses the playback.

#### Returns

`Promise<void>`

***

### resume

▸ **resume**(): `Promise<void>`

Resumes the playback.

#### Returns

`Promise<void>`

***

### rewind

▸ **rewind**(`offset`): `Promise<void>`

Seeks the current playback backwards by the specified offset.

#### Parameters

<ParamField path="offset" type="number">
  Relative number of milliseconds to seek backwards from the current position. Defaults to 5000 (5 seconds).
</ParamField>

#### Returns

`Promise<void>`

#### Permissions

* `room.playback.seek` or the more permissive `room.playback`

You need to specify the permissions when [creating the Video Room Token](/docs/apis/video/room-tokens/create-room-token) on the server side.

#### Example

```javascript
const playback = await roomSession.play({ url: "rtmp://example.com/foo" });
await playback.rewind(5000); // 5 seconds
```

***

### seek

▸ **seek**(`timecode`): `Promise<void>`

Seeks the current playback to the specified absolute position.

#### Parameters

<ParamField path="timecode" type="number" required={true}>
  The absolute position in milliseconds to seek to in the playback.
</ParamField>

#### Returns

`Promise<void>`

#### Permissions

* `room.playback.seek` or the more permissive `room.playback`

You need to specify the permissions when [creating the Video Room Token](/docs/apis/video/room-tokens/create-room-token) on the server side.

#### Example

```javascript
const playback = await roomSession.play({ url: "rtmp://example.com/foo" });
await playback.seek(30_000); // 30th second
```

***

### setVolume

▸ **setVolume**(`volume`): `Promise<void>`

Sets the audio volume for the playback.

#### Parameters

<ParamField path="volume" type="number" required={true}>
  The desired volume. Values range from -50 to 50, with a default of 0.
</ParamField>

#### Returns

`Promise<void>`

***

### stop

▸ **stop**(): `Promise<void>`

Stops the playback.

#### Returns

`Promise<void>`