Video SDK for Blueprint
- API Overview
  Agora provides ensured quality of experience (QoE) for worldwide Internet-based voice and video communications through SD-RTN™.
- IRtcEngine
  The basic interface of the Agora SDK that implements the core functions of real-time communication.
- IRtcEngineEx
  This interface class contains multi-channel methods.
- IRtcEngineEventHandler
  The SDK uses the IRtcEngineEventHandler interface to send event notifications to your app. Your app can get those notifications through methods that inherit this interface.
- IMediaPlayer
  This class provides media player functions and supports multiple instances.
- IAudioEncodedFrameObserver
  The encoded audio observer.
- IAudioDeviceManager
  Audio device management methods.
- IAudioDeviceCollection
  The IAudioDeviceCollection interface. You can get the information of audio devices with this interface.
- IVideoDeviceManager
  Video device management methods.
- IVideoDeviceCollection
  You can get the information of video devices with this interface.
- IMediaPlayerCacheManager
  This class provides methods to manage cached media files.
- IMediaPlayerCustomDataProvider
  The callback for custom media resource files.
- IMediaPlayerSourceObserver
  Provides callbacks for media players.
- IAudioFrameObserver
  The audio frame observer.
- IAudioFrameObserverBase
  The audio frame observer.
- IAudioSpectrumObserver
  The audio spectrum observer.
- IPacketObserver
  The definition of IPacketObserver.
- IMetadataObserver
  The metadata observer.
- IVideoEncodedFrameObserver
  Receives encoded video images.
- IVideoFrameObserver
  The IVideoFrameObserver class.
- ILocalSpatialAudioEngine
  This class calculates user positions through the SDK to implement the spatial audio effect.
- IScreenCaptureSourceList
  The IScreenCaptureSourceList class. This class is returned in the GetScreenCaptureSources method.
- Struct and Enum
  This page lists all the definitions of Struct and the enums for Blueprint.

IAudioFrameObserver

The audio frame observer.

You can call RegisterAudioFrameObserver to register or unregister the IAudioFrameObserver audio frame observer.

FOnPlaybackAudioFrameBeforeMixing

Retrieves the audio frame before mixing of subscribed remote users.

DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnPlaybackAudioFrameBeforeMixing, const FString, channelId, int64, uid, const FAudioFrame&, audioFrame);

Parameters

channelId: The channel ID.
uid: The ID of subscribed remote users.
audioFrame: The raw audio data. See FAudioFrame.

Returns

Without practical meaning.