Documentation
Real-time Audio and Video
Function Overview

Function Overview

Last updated：2025-03-22 00:13

ZEGO SDK has network nodes that fully cover key areas of the world, provides rich APIs, and provides clear and stable real-time voice and video cloud services for multiple terminals.

For the error codes returned by the API, please refer to: https://www.zegocloud.com/docs/video-call/error-code.

The following is a brief introduction to the basic API.

main

Method	Description
createEngine	Create ZegoExpressEngine singleton object and initialize SDK.
destroyEngine	Destroy the ZegoExpressEngine singleton object and deinitialize the SDK.
getEngine	Returns the singleton instance of ZegoExpressEngine.
setEngineConfig	Set advanced engine configuration.
setLogConfig	Set log configuration.
setLocalProxyConfig	Set local proxy config.
setCloudProxyConfig	Set cloud proxy config.
setRoomMode	Set room mode.
setGeoFence	Set Geo Fence.
getVersion	Gets the SDK's version number.
setApiCalledCallback	Set method execution result callback.
isFeatureSupported	Query whether the current SDK supports the specified feature.
setEventHandler	Sets up the event notification callbacks that need to be handled. If the eventHandler is set to [null], all the callbacks set previously will be cleared.
setRoomScenario	Set room scenario.
uploadLog	Uploads logs to the ZEGO server.
uploadLog	Uploads logs to the ZEGO server, with callback.
submitLog	Uploads logs to the ZEGO server.
enableDebugAssistant	Enable the debug assistant. Note, do not enable this feature in the online version! Use only during development phase!
callExperimentalAPI	Call the experimental API.
onDebugError	The callback for obtaining debugging error information.
onApiCalledResult	Method execution result callback
onEngineStateUpdate	The callback triggered when the audio/video engine state changes.
onRecvExperimentalAPI	Experimental API callback
onFatalError	The callback that triggered a fatal error, causing the SDK to malfunction and unable to function properly.

room

Method	Description
loginRoom	Logs in to a room. You must log in to a room before publishing or playing streams.
loginRoom	Logs in to a room with advanced room configurations. You must log in to a room before publishing or playing streams.
loginRoom	Log in to the room by configuring advanced properties, and return the login result through the callback parameter. You must log in to the room before pushing or pulling the stream.
logoutRoom	Exit the room.
logoutRoom	Exit the room with callback.
logoutRoom	Exit the room of the specified room ID.
logoutRoom	Exit the room of the specified room ID with callback.
switchRoom	Switch the room.
switchRoom	Switch the room with advanced room configurations.
renewToken	Renew token.
setRoomExtraInfo	Set room extra information.
getRoomStreamList	Get room stream list.
onRoomStateUpdate	Notification of the room connection state changes.
onRoomStateChanged	Notification of the room connection state changes, including specific reasons for state change.
onRoomUserUpdate	The callback triggered when the number of other users in the room increases or decreases.
onRoomOnlineUserCountUpdate	The callback triggered every 30 seconds to report the current number of online users.
onRoomStreamUpdate	The callback triggered when the number of streams published by the other users in the same room increases or decreases.
onRoomStreamExtraInfoUpdate	The callback triggered when there is an update on the extra information of the streams published by other users in the same room.
onRoomExtraInfoUpdate	The callback triggered when there is an update on the extra information of the room.
onRoomTokenWillExpire	Callback notification that room Token authentication is about to expire.

publisher

Method	Description
startPublishingStream	Start publishing a stream.
startPublishingStream	Starts publishing a stream (for the specified channel). You can call this function to publish a second stream.
startPublishingStream	Starts publishing a stream. Support multi-room mode.
stopPublishingStream	Stops publishing a stream.
stopPublishingStream	Stops publishing a stream (for the specified channel).
setStreamExtraInfo	Sets the extra information of the stream being published.
setStreamExtraInfo	Sets the extra information of the stream being published for the specified publish channel.
startPreview	Starts/Updates the local video preview (for the specified channel).
stopPreview	Stops the local preview (for the specified channel).
setVideoConfig	Sets up the video configurations.
setVideoConfig	Sets up the video configurations (for the specified channel).
getVideoConfig	Gets the current video configurations.
getVideoConfig	Gets the current video configurations (for the specified channel).
setPublishDualStreamConfig	Set dual stream config.
setAudioConfig	Sets up the audio configurations.
setAudioConfig	Sets up the audio configurations for the specified publish channel.
getAudioConfig	Gets the current audio configurations.
getAudioConfig	Gets the current audio configurations from the specified publish channel.
setPublishStreamEncryptionKey	Set encryption key for the publishing stream.
setPublishStreamEncryptionKey	Set encryption key for the publishing stream for the specified publish channel.
mutePublishStreamAudio	Stops or resumes sending the audio part of a stream.
mutePublishStreamAudio	Stops or resumes sending the audio part of a stream for the specified channel.
mutePublishStreamVideo	Stops or resumes sending the video part of a stream.
mutePublishStreamVideo	Stops or resumes sending the video part of a stream for the specified channel.
setStreamAlignmentProperty	Enable or disable the stream precision alignment function.
enableTrafficControl	Enables or disables traffic control.
enableTrafficControl	Enables or disables the traffic control for the specified publish channel.
setMinVideoBitrateForTrafficControl	Set the minimum video bitrate threshold for traffic control.
setMinVideoBitrateForTrafficControl	Sets the minimum video bitrate for traffic control for the specified publish channel.
setMinVideoFpsForTrafficControl	Sets the minimum video frame rate threshold for traffic control.
setMinVideoResolutionForTrafficControl	Sets the minimum video resolution threshold for traffic control.
setTrafficControlFocusOn	Set the factors of concern that trigger traffic control.
setTrafficControlFocusOn	Set the factors of concern that trigger traffic control for the specified publish channel.
setCaptureVolume	Sets the audio recording volume for stream publishing.
addPublishCdnUrl	Adds a target CDN URL to which the stream will be relayed from ZEGO RTC server.
addPublishCdnUrl	Adds a target CDN URL to which the stream will be relayed from ZEGO RTC server.
removePublishCdnUrl	Deletes the specified CDN URL, which is used for relaying streams from ZEGO RTC server to CDN.
enablePublishDirectToCDN	Whether to directly push to CDN (without going through the ZEGO RTC server).
enablePublishDirectToCDN	Whether to directly push to CDN (without going through the ZEGO RTC server), for the specified channel.
setSEIConfig	Set the Supplemental Enhancement Information type.
sendSEI	Sends Supplemental Enhancement Information.
sendSEI	Sends Supplemental Enhancement Information to the specified publish channel.
sendSEISyncWithCustomVideo	Send the media supplementary enhancement information synchronized with the current video frame during custom video capture.
sendAudioSideInfo	Send audio side information.
enableHardwareEncoder	Enables or disables hardware encoding.
setCapturePipelineScaleMode	Sets the timing of video scaling in the video capture workflow. You can choose to do video scaling right after video capture (the default value) or before encoding.
setDummyCaptureImagePath	Set the path of the static picture would be published when the camera is closed.
enableH265EncodeFallback	Whether to enable H.265 encoding to automatically downgrade to H.264 encoding.
isVideoEncoderSupported	Whether the specified video encoding type is supported.
isVideoEncoderSupported	Whether the specified video encoding type and implementation are supported.
setVideoSource	Set video capture source.
setVideoSource	Set a video capture instance as the video capture source.
setVideoSource	Set video capture source for the specified channel.
setVideoSource	Set a video capture instance as video capture source for the specified channel.
setAudioSource	Set audio capture source.
setAudioSource	Set audio capture source for the specified channel.
setAudioSource	Set audio capture source with audio mix config.
onPublisherStateUpdate	The callback triggered when the state of stream publishing changes.
onPublisherQualityUpdate	Callback for current stream publishing quality.
onPublisherCapturedAudioFirstFrame	The callback triggered when the first audio frame is captured.
onPublisherCapturedVideoFirstFrame	The callback triggered when the first video frame is captured.
onPublisherSendAudioFirstFrame	The callback triggered when the first audio frame is sent.
onPublisherSendVideoFirstFrame	The callback triggered when the first video frame is sent.
onPublisherRenderVideoFirstFrame	The callback triggered when the first video frame is rendered.
onPublisherVideoSizeChanged	The callback triggered when the video capture resolution changes.
onPublisherRelayCDNStateUpdate	The callback triggered when the state of relayed streaming to CDN changes.
onPublisherVideoEncoderChanged	The callback triggered when the video encoder changes in publishing stream.
onPublisherStreamEvent	The callback triggered when publishing stream.

player

Method	Description
startPlayingStream	Starts playing a stream from ZEGO RTC server.
startPlayingStream	Starts playing a stream from ZEGO RTC server or from third-party CDN. Support multi-room mode.
stopPlayingStream	Stops playing a stream.
setPlayStreamDecryptionKey	Set decryption key for the playing stream.
setPlayStreamCrossAppInfo	Set up cross App playing stream information.
setPlayVolume	Sets the stream playback volume.
setAllPlayStreamVolume	Sets the all stream playback volume.
setPlayStreamVideoType	Set play video stream type.
setPlayStreamBufferIntervalRange	Set the adaptive adjustment interval range of the buffer for playing stream.
setPlayStreamFocusOn	Set the weight of the pull stream priority.
mutePlayStreamAudio	Whether the pull stream can receive the specified audio data.
mutePlayStreamVideo	Whether the pull stream can receive the specified video data.
muteAllPlayStreamAudio	Can the pull stream receive all audio data. (When set to true, calling [mutePlayStreamAudio] will not take effect)
muteAllPlayStreamVideo	Can the pull stream receive all video data. (When set to true, calling [mutePlayStreamVideo] will not take effect)
enableHardwareDecoder	Enables or disables hardware decoding.
isVideoDecoderSupported	Whether the specified video decoding format is supported.
isVideoDecoderSupported	Whether the specified video decoding format is supported.
setPlayStreamsAlignmentProperty	Set the play stream alignment properties.
onPlayerStateUpdate	The callback triggered when the state of stream playing changes.
onPlayerQualityUpdate	Callback for current stream playing quality.
onPlayerMediaEvent	The callback triggered when a media event occurs during streaming playing.
onPlayerRecvAudioFirstFrame	The callback triggered when the first audio frame is received.
onPlayerRecvVideoFirstFrame	The callback triggered when the first video frame is received.
onPlayerRenderVideoFirstFrame	The callback triggered when the first video frame is rendered.
onPlayerRenderCameraVideoFirstFrame	Calls back when the stream playing end renders the first frame of the video from the remote camera.
onPlayerVideoSizeChanged	The callback triggered when the stream playback resolution changes.
onPlayerRecvSEI	The callback triggered when Supplemental Enhancement Information is received.
onPlayerSyncRecvSEI	The callback triggered when Supplemental Enhancement Information is received synchronously.
onPlayerRecvMediaSideInfo	The callback triggered when Supplemental Enhancement Information is received synchronously.
onPlayerRecvAudioSideInfo	Receive the audio side information content of the remote stream.
onPlayerLowFpsWarning	Playing stream low frame rate warning.
onPlayerStreamEvent	The callback triggered when playing stream.

IM

Method	Description
createRealTimeSequentialDataManager	Create the real time sequential data manager instance
destroyRealTimeSequentialDataManager	Destroy the real time sequential data manager instance
setEventHandler	Sets up the real-time sequential data event handler.
startBroadcasting	Start broadcasting real-time sequential data stream.
stopBroadcasting	Stop broadcasting real-time sequential data stream.
sendRealTimeSequentialData	Send real-time sequential data to the broadcasting stream ID.
startSubscribing	Start subscribing real-time sequential data stream.
stopSubscribing	Stop subscribing real-time sequential data stream.
getIndex	Get real-time sequential data manager index.
onReceiveRealTimeSequentialData	Callback for receiving real-time sequential data.
sendBroadcastMessage	Sends a Broadcast Message.
sendBarrageMessage	Sends a Barrage Message (bullet screen) to all users in the same room, without guaranteeing the delivery.
sendCustomCommand	Sends a Custom Command to the specified users in the same room.
sendTransparentMessage	Sends a transparent message in room.
onRecvRoomTransparentMessage	The callback triggered when Barrage Messages are received.
onIMRecvBroadcastMessage	The callback triggered when Broadcast Messages are received.
onIMRecvBarrageMessage	The callback triggered when Barrage Messages are received.
onIMRecvCustomCommand	The callback triggered when a Custom Command is received.

mixer

Method	Description
startMixerTask	Starts a stream mixing task.
stopMixerTask	Stops a stream mixing task.
startAutoMixerTask	Starts an auto stream mixing task.
stopAutoMixerTask	Stops an auto stream mixing task.
onMixerRelayCDNStateUpdate	The callback triggered when the state of relayed streaming of the mixed stream to CDN changes.

preprocess

Method	Description
enableAEC	Whether to enable acoustic echo cancellation (AEC).
setAECMode	Sets the acoustic echo cancellation (AEC) mode.
enableAGC	Enables or disables automatic gain control (AGC).
enableANS	Enables or disables active noise suppression (ANS, aka ANC).
enableTransientANS	Enables or disables transient noise suppression.
setANSMode	Sets the automatic noise suppression (ANS) mode.
enableSpeechEnhance	Enables or disables speech enhancement.
setAudioEqualizerGain	Set the sound equalizer (EQ).
setVoiceChangerPreset	Setting up the voice changer via preset enumeration.
setVoiceChangerParam	Setting up the specific voice changer parameters.
setReverbPreset	Setting up the reverberation via preset enumeration.
setReverbAdvancedParam	Setting up the specific reverberation parameters.
setReverbEchoParam	Setting up the specific reverberation echo parameters.
enableVirtualStereo	Enable or disable the virtual stereo effect when publishing stream.
enablePlayStreamVirtualStereo	Enable or disable the virtual stereo effect when playing stream.
setElectronicEffects	Turn on or off the electronic sound effect.

mediaPlayer

Method	Description
createMediaPlayer	Creates a media player instance.
destroyMediaPlayer	Destroys a media player instance.
setEventHandler	Set event notification callback handler of the media player.
setVideoHandler	Set video data callback handler of the media player.
setAudioHandler	Set audio data callback handler of the media player.
loadResource	Load local or network media resource.
loadResourceWithPosition	Load local or network media resource and specify the start position.
loadResourceFromMediaData	Load binary audio resource.
loadCopyrightedMusicResourceWithPosition	Load copyrighted music resource.
start	Start playing.
stop	Stop playing.
pause	Pause playing.
resume	Resume playing.
seekTo	Set the specified playback progress.
enableRepeat	Whether to repeat playback.
setPlaySpeed	Set the speed of play.
enableAux	Whether to mix the player's sound into the stream being published.
muteLocal	Whether to play locally silently.
setVolume	Set mediaplayer volume. Both the local play volume and the publish volume are set.
setPlayVolume	Set mediaplayer local playback volume.
setPublishVolume	Set mediaplayer publish volume.
setProgressInterval	Set playback progress callback interval.
getPlayVolume	Gets the current local playback volume of the mediaplayer, the range is 0 ~ 200, with the default value of 60.
getPublishVolume	Gets the current publish volume of the mediaplayer, the range is 0 ~ 200, with the default value of 60.
getTotalDuration	Get the total progress of your media resources.
getCurrentProgress	Get current playing progress.
getAudioTrackCount	Get the number of audio tracks of the playback file.
setAudioTrackIndex	Set the audio track of the playback file.
getCurrentState	Get the current playback status.
getIndex	Get media player index.
enableAccurateSeek	Enable accurate seek and set relevant attributes.
setNetWorkResourceMaxCache	Set the maximum cache duration and cache data size of web materials.
getNetWorkResourceCache	Get the playable duration and size of the cached data of the current network material cache queue
setNetWorkBufferThreshold	Use this interface to set the cache threshold that the media player needs to resume playback. The SDK default value is 5000ms，The valid value is greater than or equal to 1000ms
enableSoundLevelMonitor	Whether to enable sound level monitoring.
enableFrequencySpectrumMonitor	Whether to enable frequency spectrum monitoring.
setActiveAudioChannel	Set the playback channel.
clearView	Clears the last frame of the playback control that remains on the control after playback ends.
getMediaInfo	Get meida information such as video resolution from media file.
onMediaPlayerStateUpdate	MediaPlayer playback status callback.
onMediaPlayerNetworkEvent	The callback triggered when the network status of the media player changes.
onMediaPlayerPlayingProgress	The callback to report the current playback progress of the media player.
onMediaPlayerRenderingProgress	The callback to report the current rendering progress of the media player.
onMediaPlayerVideoSizeChanged	The callback triggered when when the resolution of the playback video changes.
onMediaPlayerRecvSEI	The callback triggered when the media player got media side info.
onMediaPlayerSoundLevelUpdate	The callback of sound level update.
onMediaPlayerFrequencySpectrumUpdate	The callback of frequency spectrum update.
onMediaPlayerFirstFrameEvent	The callback triggered when the media player plays the first frame.
onVideoFrame	The callback triggered when the media player throws out video frame data.
onVideoFrame	The callback triggered when the media player throws out video frame data, with additional information for the video frame.
onAudioFrame	The callback triggered when the media player throws out audio frame data.

audioEffectPlayer

Method	Description
createAudioEffectPlayer	Creates a audio effect player instance.
destroyAudioEffectPlayer	Destroys a audio effect player instance.
setEventHandler	Set audio effect player event handler.
start	Start playing audio effect.
stop	Stop playing audio effect.
pause	Pause playing audio effect.
resume	Resume playing audio effect.
stopAll	Stop playing all audio effect.
pauseAll	Pause playing all audio effect.
resumeAll	Resume playing all audio effect.
seekTo	Set the specified playback progress.
setVolume	Set volume for a single audio effect. Both the local play volume and the publish volume are set.
setVolumeAll	Set volume for all audio effect. Both the local play volume and the publish volume are set.
setPlaySpeed	Set the playback speed for a given audio effect. Both the local play speed and the publish speed are set. (separate settings are not supported).
getTotalDuration	Get the total duration of the specified audio effect resource.
getCurrentProgress	Get current playback progress.
loadResource	Load audio effect resource.
unloadResource	Unload audio effect resource.
getIndex	Get audio effect player index.
onAudioEffectPlayStateUpdate	Audio effect playback state callback.

record

Method	Description
startRecordingCapturedData	Starts to record and directly save the data to a file.
stopRecordingCapturedData	Stops recording locally captured audio or video.
setDataRecordEventHandler	Sets up the event callback handler for data recording.
onCapturedDataRecordStateUpdate	The callback triggered when the state of data recording (to a file) changes.
onCapturedDataRecordProgressUpdate	The callback to report the current recording progress.

device

Method	Description
muteMicrophone	Mutes or unmutes the microphone.
isMicrophoneMuted	Checks whether the microphone is muted.
muteSpeaker	Mutes or unmutes the audio output speaker.
isSpeakerMuted	Checks whether the audio output speaker is muted.
getAudioDeviceList	Gets a list of audio devices.
getDefaultAudioDeviceID	Get the device ID of the default audio device.
useAudioDevice	Chooses to use the specified audio device.
getAudioDeviceVolume	Get volume for the specified audio device.
setAudioDeviceVolume	Set volume for the specified audio device.
enableAudioCaptureDevice	Enables or disables the audio capture device.
enableCamera	Turns on/off the camera.
enableCamera	Turns on/off the camera (for the specified channel).
useVideoDevice	Chooses to use the specified video device (for the specified channel).
getVideoDeviceList	Gets a list of video devices.
getDefaultVideoDeviceID	Get the device ID of the default video device.
startSoundLevelMonitor	Starts sound level monitoring.
startSoundLevelMonitor	Starts sound level monitoring. Support setting the listening interval.
startSoundLevelMonitor	Starts sound level monitoring. Support enable some advanced feature.
stopSoundLevelMonitor	Stops sound level monitoring.
startAudioSpectrumMonitor	Starts audio spectrum monitoring. Support setting the listening interval.
stopAudioSpectrumMonitor	Stops audio spectrum monitoring.
enableHeadphoneMonitor	Enables or disables headphone monitoring.
setHeadphoneMonitorVolume	Sets the headphone monitor volume.
startAudioVADStableStateMonitor	Start audio VAD stable state monitoring.
startAudioVADStableStateMonitor	Start audio VAD stable state monitoring, and the monitoring period can be set.
stopAudioVADStableStateMonitor	Stop audio VAD stable state monitoring.
onCapturedSoundLevelUpdate	The local captured audio sound level callback.
onCapturedSoundLevelInfoUpdate	The local captured audio sound level callback, supported vad.
onRemoteSoundLevelUpdate	The remote playing streams audio sound level callback.
onRemoteSoundLevelInfoUpdate	The remote playing streams audio sound level callback, supported vad.
onLocalDeviceExceptionOccurred	The callback triggered when a local device exception occurred.
onRemoteCameraStateUpdate	The callback triggered when the state of the remote camera changes.
onRemoteMicStateUpdate	The callback triggered when the state of the remote microphone changes.
onRemoteSpeakerStateUpdate	The callback triggered when the state of the remote speaker changes.
onAudioVADStateUpdate	Callback for audio VAD stable state update.

customVideoIO

Method	Description
enableCustomVideoRender	Enables or disables custom video rendering.
setCustomVideoRenderHandler	Sets up the event callback handler for custom video rendering.
enableCapturedVideoCustomVideoRender	Enables or disables captured video to custom video rendering.
enableRemoteVideoCustomVideoRender	Enables or disables remote playback video to custom video rendering.
enableCustomVideoCapture	Enables or disables custom video capture.
enableCustomVideoCapture	Enables or disables custom video capture (for the specified channel).
setCustomVideoCaptureHandler	Sets the event callback handler for custom video capture.
sendCustomVideoCaptureRawData	Sends the video frames (Raw Data) produced by custom video capture to the SDK.
sendCustomVideoCaptureRawData	Sends the video frames (Raw Data) produced by custom video capture to the SDK (for the specified channel).
setCustomVideoCaptureFillMode	Sets the video fill mode of custom video capture.
setCustomVideoCaptureFillMode	Sets the video fill mode of custom video capture (for the specified channel).
setCustomVideoCaptureDeviceState	Sets device state of custom video capture (for the specified channel).
setCustomVideoCaptureTransformMatrix	Sets the video transform matrix of custom video capture (for the specified channel).
setCustomVideoCaptureRegionOfInterest	Set the region of interest (ROI) for encoder of custom video capture (for the specified channel).
onStart	Customize the notification of the start of video capture.
onStop	Customize the notification of the end of the collection.
onEncodedDataTrafficControl	When network changes are detected during custom video capture, the developer is notified that traffic control is required, and the encoding configuration is adjusted according to the recommended parameters of the SDK.
onCapturedVideoFrameRawData	When custom video rendering is enabled, the original video frame data collected by the local preview is called back.
onRemoteVideoFrameRawData	When custom video rendering is enabled, the remote end pulls the original video frame data to call back, and distinguishes different streams by streamID.
onRemoteVideoFrameEncodedData	Custom video rendering remote playing stream video frame undecoded data callback.

customAudioIO

Method	Description
enableCustomAudioCaptureProcessing	Enable local collection and custom audio processing(before ear return).
enableCustomAudioCaptureProcessingAfterHeadphoneMonitor	Turn on local collection and custom audio processing (after ear return).
enableCustomAudioRemoteProcessing	Enable custom audio processing for remote playing stream.
enableCustomAudioPlaybackProcessing	Enable custom audio processing for SDK playback audio data.
setCustomAudioProcessHandler	Set up callback handler for custom audio processing.
startAudioDataObserver	Enable audio data observering.
stopAudioDataObserver	Disable audio data observering.
setAudioDataHandler	Sets up the event callback handler for receiving audio data.
enableCustomAudioIO	Enables the custom audio I/O function.
enableCustomAudioIO	Enables the custom audio I/O function (for the specified channel), support PCM, AAC format data.
sendCustomAudioCaptureAACData	Sends AAC audio data produced by custom audio capture to the SDK (for the specified channel).
sendCustomAudioCapturePCMData	Sends PCM audio data produced by custom audio capture to the SDK.
sendCustomAudioCapturePCMData	Sends PCM audio data produced by custom audio capture to the SDK (for the specified channel).
fetchCustomAudioRenderPCMData	Fetches PCM audio data of the remote stream from the SDK for custom audio rendering.
onProcessCapturedAudioData	Custom audio processing local captured PCM audio frame callback.
onProcessCapturedAudioDataAfterUsedHeadphoneMonitor	Custom audio processing local captured PCM audio frame callback after used headphone monitor.
onProcessRemoteAudioData	Custom audio processing remote playing stream PCM audio frame callback.
onProcessPlaybackAudioData	Custom audio processing SDK playback PCM audio frame callback.
onCapturedAudioData	The callback for obtaining the audio data captured by the local microphone.
onPlaybackAudioData	The callback for obtaining the audio data of all the streams playback by SDK.
onMixedAudioData	Callback to get the audio data played by the SDK and the audio data captured by the local microphone. The audio data is the data mixed by the SDK.
onPlayerAudioData	The callback for obtaining the audio data of each stream.

mediaDataPublisher

Method	Description
createMediaDataPublisher	Creates a media data publisher instance.
createMediaDataPublisher	Creates a media data publisher instance.
destroyMediaDataPublisher	Destroys a media data publisher instance.
setEventHandler	Set event callback handler for the media data publisher.
addMediaFilePath	Add media file to the publish queue. Currently, only mp4 / m4a / aac files are supported, and special conversion is required.
reset	Clear all the status in this media data publisher, so that it can be restarted next time.
setVideoSendDelayTime	Set the delay time of video playback.
seekTo	Specify the starting point of the current video file publishing.
getTotalDuration	Get the total duration of the current file.
getCurrentDuration	Get the playing progress of the current file.
getIndex	Get the channel index of the media data publisher.
onMediaDataPublisherFileOpen	The event callback of the media data publisher opening a media file.
onMediaDataPublisherFileClose	The event callback of the media data publisher closing a media file.
onMediaDataPublisherFileDataBegin	The event callback that the media data publisher has read data from the media file.
onMediaDataPublisherFileDataEnd	The event callback that the media data publisher has completed a file stream publishing.

utilities

Method	Description
startPerformanceMonitor	Start system performance monitoring.
stopPerformanceMonitor	Stop system performance monitoring.
startNetworkProbe	Start network probe.
stopNetworkProbe	Stop network probe.
testNetworkConnectivity	Test network connectivity.
startNetworkSpeedTest	Start network speed test.
startNetworkSpeedTest	Start network speed test. Support set speed test interval。
stopNetworkSpeedTest	Stop network speed test.
getNetworkTimeInfo	Obtain synchronization network time information.
startDumpData	Dump audio and video data.
stopDumpData	Stop dumping data.
uploadDumpData	Upload dumped data to the ZEGO server.
removeDumpData	Remove dumped data.
onPerformanceStatusUpdate	The system performance status callback.
onNetworkModeChanged	Network mode changed callback.
onNetworkSpeedTestError	Network speed test error callback.
onNetworkSpeedTestQualityUpdate	Network speed test quality callback.
onNetworkQuality	The network quality callback of users who are publishing in the room.
onNetworkTimeSynchronized	Successful callback of network time synchronization.
onRequestDumpData	Request to dump data.
onRequestUploadDumpData	Request to dump data.
onStartDumpData	Callback when starting to dump data.
onStopDumpData	Callback when stopping to dump data.
onUploadDumpData	Callback after uploading the dump data.

rangeAudio

Method	Description
createRangeAudio	Creates a range audio instance.
destroyRangeAudio	Destroys a range audio instance.
setEventHandler	set range audio event handler.
setAudioReceiveRange	Set the maximum range of received audio.
setPositionUpdateFrequency	Set the frequency of real-time update locations within the SDK.
setRangeAudioVolume	Set range voice volume.
setStreamVocalRange	Set the sound range for the stream.
updateStreamPosition	Update the location of the flow.
updateSelfPosition	Update self position and orentation.
updateAudioSource	Add or update audio source position information.
enableSpatializer	Turn the 3D spatial sound on or off.
enableMicrophone	Turn the microphone on or off.
enableSpeaker	Turn the speaker on or off.
setRangeAudioMode	Set range audio mode.
setRangeAudioCustomMode	Set range audio custom mode.
setTeamID	Set team ID.
muteUser	Whether can receive the audio data of the specified user.
onRangeAudioMicrophoneStateUpdate	Range audio microphone state callback.

CopyrightedMusic

Method	Description
createCopyrightedMusic	Creates a copyrighted music instance.
destroyCopyrightedMusic	Destroys a copyrighted music instance.
setEventHandler	set copyrighted music event handler.
initCopyrightedMusic	Initialize the copyrighted music module.
getCacheSize	Get cache size.
clearCache	Clear cache.
sendExtendedRequest	Send extended feature request.
getLrcLyric	Get lyrics in lrc format.
getLrcLyric	Get lyrics in lrc format.
getKrcLyricByToken	Get lyrics in krc format.
requestResource	Request music resource.
getSharedResource	Get shared music resource.
download	Download music resource.
cancelDownload	Cancel download of music resource.
queryCache	Query the resource's cache is existed or not.
getDuration	Get the playing time of a song or accompaniment file.
setScoringLevel	Set the difficulty level of scoring.
startScore	Start scoring.
pauseScore	Pause scoring.
resumeScore	Resume scoring.
stopScore	Stop scoring.
resetScore	Reset scoring.
getPreviousScore	Get the score of the previous sentence.
getAverageScore	Get average score.
getTotalScore	Get total score .
getFullScore	Get full score .
getStandardPitch	Get standard pitch data.
getCurrentPitch	Get real-time pitch data.
onDownloadProgressUpdate	Callback for download song or accompaniment progress rate.
onCurrentPitchValueUpdate	Real-time pitch line callback.

deprecated_api

Method	Description
createEngine	[Deprecated] Create ZegoExpressEngine singleton object and initialize SDK. Deprecated since 2.14.0, please use the method with the same name without [isTestEnv] parameter instead. Please refer to Testing environment deprecation for more details.
requestSong	[Deprecated] Request a song. Deprecated since 3.0.2, please use the [requestResource] function instead.
requestAccompaniment	[Deprecated] Request accompaniment. Deprecated since 3.0.2, please use the [requestResource] function instead.
requestAccompanimentClip	[Deprecated] Request accompaniment clip. Deprecated since 3.0.2, please use the [requestResource] function instead.
getMusicByToken	[Deprecated] Get a song or accompaniment. Deprecated since 3.0.2, please use the [getSharedResource] function instead.
getLrcLyric	[Deprecated] Get lyrics in lrc format. Deprecated since 3.2.1, please use the method with the same name with [vendorID] parameter instead.
queryCache	[Deprecated] Query the resource's cache is existed or not. Deprecated since 3.2.1, please use the method with the same name with [vendorID] parameter instead.
queryCache	[Deprecated] Query the resource's cache is existed or not. Deprecated since 3.9.0, please use the method with the same name with [config] parameter instead.
setVoiceChangerParam	[Deprecated] Setting up the specific voice changer parameters.