# OTSubscriberDelegate Protocol Reference

Conforms to | OTSubscriberKitDelegate
Declared in | OTSubscriber.h

## Overview

OTSubscriberDelegate extends OTSubscriberKitDelegate with additional optional callbacks specific to the OTSubscriber implementation. Currently, there is only one additional callback, but others may be added in a future release.

### `– subscriberVideoDataReceived:`

Sent when a frame of video has been decoded. Although the subscriber will connect in a relatively short time, video can take more time to synchronize. This message is sent after the [OTSubscriberKitDelegate subscriberDidConnectToStream:] message is sent.

`- (void)subscriberVideoDataReceived:(nonnull OTSubscriber *)subscriber`

#### Parameters

`subscriber` | The subscriber that generated this event.

#### Declared In

`OTSubscriber.h`