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Release Notes
Last updated 2021/07/23 02:50:24

This page provides the release notes for the Agora Flutter SDK.

Known issues and limitations

Compatibility with iOS 15 beta

As of v4.0.5 (Native v3.4.5), the SDK supports iOS 15 beta. For the SDK versions between v3.2.1 and v4.0.1 (Native v3.4.2) inclusive, crashes occur on iOS 15 beta. To fix this issue, upgrade the SDK to v4.0.5 or later.

v4.0.6 (Native 3.4.6)

v4.0.6 was released on July 23, 2021.

Improvements

To improve the accuracy of face detection results, as of this release, the SDK triggers the facePositionChanged callback immediately after detecting the disappearance of the human face.

Fixed issues

This release fixed the following issues:

  • Failed to enable the camera on certain Android 4.4 TV models.
  • Low-volume issues occurred when the user used Type-C headphones.
  • The interface xxx is not visible from class loader error when running a project on some Android devices.
  • Occasional crash during SDK initialization under certain circumstances.
  • When startAudioMixing was called and a percent-encoding URL was passed in this method, the SDK failed to play the corresponding online audio file.

v4.0.5 (Native 3.4.5)

v4.0.5 was released on July 15, 2021.

Compatibility changes

1. Compatibility with iOS 15 beta (iOS only)

As of v4.0.5, the SDK supports iOS 15 beta. For the SDK versions between v3.2.1 and v4.0.1 inclusive, crashes occur on iOS 15 beta. To fix this issue, upgrade the SDK to v4.0.5 or later.

2. API incompatibility changes

This release makes the following incompatibility changes to APIs:

  • Deprecates the RtcEngineConfig class and the createWithConfig method, and replace them with the RtcEngineContext class and the createWithContext method. Compared with RtcEngineConfig, the data type of the areaCode property in RtcEngineContextchanges from AreaCode to List<AreaCode>, which supports setting multiple regions for connection.

  • Renames the the following properties in the RtcStats interface:

    • totalDuration to duration
    • users to userCount

    The data type and definition of the properties remain unchanged.

  • Strictly distinguishes the mandatory and non-mandatory parameters in the constructors of all classes. For details, see Incompatible changes of class constructors.

If you upgrade the SDK to v4.0.5 or later, to avoid affecting your service, ensure that you modify the implementation of these APIs.

3. Support for GCM2 encryption

To further improve the security during real-time audio and video transmission process, this release adds the following:

  • AES128GCM2 and AES256GCM2 encryption modes in EncryptionMode. The new GCM encryption modes use a more secure KDF (Key Derivation Function) and support setting the key and salt.
  • The encryptionKdfSalt member in EncryptionConfig to add the salt for the AES128GCM2 and AES256GCM2 encryption modes.

This release also changes the default encryption mode from AES128XTS to AES128GCM2. If you use the default encryption mode in earlier versions, after upgrading the SDK to v4.0.5, ensure that you call enableEncryption and set EncryptionMode to AES128XTS.

4. Media stream publishing behavior changes

To flexibly control the publishing state in multiple channels, this release optimizes the RtcChannel class as follows:

  • Deprecates the publish and unpublish methods, and adds muteLocalAudioStream and muteLocalVideoStream instead. You can set the publishing state of the audio stream and video stream separately.
  • Adds the publishLocalAudio and publishLocalVideo members in ChannelMediaOptions. You can set the publishing state when joining a channel.
  • After calling setClientRole(Broadcaster), the local user publishes audio and video streams by default.
The following APIs have the same function. If you call them together, the one called later takes effect.
  • publishLocalAudio = false serves the same function as muteLocalAudioStream(true).
  • publishLocalVideo = false serves the same function as muteLocalVideoStream(true).

The above improvements bring the following changes in the RtcEngine class:

  • muteLocalAudioStream and muteLocalVideoStream of RtcEngine do not take effect for channels created by the RtcChannel class, so you need to use the muteLocalAudioStream and muteLocalVideoStream of the RtcChannel class instead.
  • When a user joins a channel by using joinChannel with the options parameter, you can set the publishing state.
  • If a user joins a channel by calling joinChannel with the options parameter, muteLocalAudioStream or muteLocalVideoStream only takes effect when it is called after joinChannel.

If you upgrade the SDK to v4.0.5 or later, to avoid affecting your service, Agora recommends modifying the implementation of muteLocalAudioStream, muteLocalVideoStream, publish, and unpublish.

Improvements

1. CDN live streaming

To be more transparent to users about errors and events in CDN live streaming, this release adds the following codes:

  • To RtmpStreamingStateChanged: Error code UnPublishOK (100), which reports that the streaming has been stopped normally. After you call removePublishStreamUrl to stop streaming, the SDK returns this error code and state code Idle (0).
  • To RtmpStreamingEvent: Event code UrlAlreadyInUse (2), which reports that the streaming URL is already being used for CDN live streaming. If you want to start new streaming, use a new streaming URL.

2. Music file state

When you call pauseAudioMixing after startAudioMixing, this release adds the AudioMixingStateChanged(Playing,StartedByUser)state, which indicates the music file is stopped, before reporting AudioMixingStateChanged(Stopped,StoppedByUser).

3. Audio device errors

To convey the impact of a system call on the audio sampling, this release adds Interrupted (8) in AudioLocalError, which reports that the audio sampling is interrupted by a system call.

Fixed issues

This release fixed the following issues:

  • Under poor network conditions, when you called startAudioMixing to play an online music file, occasionally the SDK response time was too long and caused a freeze.
  • Under poor network conditions, when you frequently called startAudioMixing to play an online music file, an ANR pop-up window occasionally appeared.
  • On some Android devices, after connecting a Bluetooth headset, the speaker still played audio.
  • After switching the audio route to Bluetooth, the Bluetooth device occasionally failed to sample audio.
  • Under poor network conditions, users were occasionally unable to switch roles.
  • Under certain network conditions, when the host used a Xiaomi phone to custom capture video in texture format, other users in the channel saw the host’s video as a black screen.
  • Occasionally, the user's view was upside down when the application was running on an M1 chip device. (iOS only)

API changes

Added

Modified
This release renames the following properties in RtcStats:

  • totalDuration to duration
  • users to userCount

Deprecated

  • createWithConfig
  • RtcEngineConfig class
  • publish and unpublish in RtcChannel


Changes of class constructors

To make the code more standardized and robust, as of v4.0.5, the Agora SDK strictly distinguishes mandatory and non-mandatory member properties of all classes and modifies the class constructors.

This section lists all the classes that have constructor changes in v4.0.5. If you upgrade the SDK to v4.0.5 or later, to avoid affecting your service, ensure that you modify the implementation of these classes.

VideoDimensions

The following properties in the VideoDimensions class change from required to optional:

  • width
  • height

The constructor of the VideoDimensions class changes as follows:

Earlier than v4.0.5

new VideoDimensions(640, 360);

As of v4.0.5

new VideoDimensions(width: 640, height: 360);

AgoraImage

The following properties in the AgoraImage class change from required to optional:

  • x
  • y
  • width
  • height

The constructor of the AgoraImage class changes as follows:

Earlier than v4.0.5

new AgoraImage('url', 0, 0, 640, 360);

As of v4.0.5

new AgoraImage('url', x: 0, y: 0, width: 640, height: 360);

TranscodingUser

The properties in the TranscodingUser class change from required to optional:

  • x
  • y

The constructor of the TranscodingUser class changes as follows:

Earlier than v4.0.5

new TranscodingUser(0, 0, 0, width: 640, height: 360, ...);

As of v4.0.5

new TranscodingUser(0, x: 0, y: 0, width: 640, height: 360, ...);

ChannelMediaInfo

The channelName property in the ChannelMediaInfo class changes from optional to required.

The constructor of the ChannelMediaInfo class changes as follows:

Earlier than v4.0.5

new ChannelMediaInfo(0, channelName: 'channelName', token: 'token');

As of v4.0.5

new ChannelMediaInfo('channelName', 0, token: 'token');

Rectangle

The following properties in the Rectangle class change form required to optional:

  • x
  • y
  • width
  • height

The constructor of the Rectangle class changes as follows:

Earlier than v4.0.5

new Rectangle(0, 0, 640, 360);

As of v4.0.5

new Rectangle(x: 0, y: 0, width: 640, height: 360);

WatermarkOptions

The following properties in the WatermarkOptions class change from required to optional:

  • positionInLandscapeMode
  • positionInPortraitMode

The constructor of the WatermarkOptions class changes as follows:

Earlier than v4.0.5

new WatermarkOptions(Rectangle, Rectangle, visibleInPreview: true);

As of v4.0.5

new WatermarkOptions(visibleInPreview: true, positionInLandscapeMode: Rectangle, positionInPortraitMode: Rectangle);

CameraCapturerConfiguration

The following properties in the CameraCapturerConfiguration class change from required to optional:

  • preference
  • cameraDirection

The constructor of the CameraCapturerConfiguration class changes as follows:

Earlier than v4.0.5

new CameraCapturerConfiguration(CameraCaptureOutputPreference, CameraDirection, captureWidth: 640, captureHeight: 360);

As of v4.0.5

new CameraCapturerConfiguration(preference: CameraCaptureOutputPreference, captureWidth: 640, captureHeight: 360, cameraDirection: CameraDirection);

ChannelMediaOptions

The following properties in the ChannelMediaOptions class change from required to optional:

  • autoSubscribeAudio
  • autoSubscribeVideo

The constructor of the ChannelMediaOptions class changes as follows:

Earlier than v4.0.5

new ChannelMediaOptions(true, true);

As of v4.0.5

new ChannelMediaOptions(autoSubscribeAudio: true, autoSubscribeVideo: true);

EncryptionConfig

The following properties in the EncryptionConfig class change from required to optional:

  • encryptionMode
  • encryptionKey

The constructor of the EncryptionConfig class changes as follows:

Earlier than v4.0.5

new EncryptionConfig(EncryptionMode, 'encryptionKey');

As of v4.0.5

new EncryptionConfig(encryptionMode: EncryptionMode, encryptionKey: 'encryptionKey');

RtcStats

All properties in RtcStats cannot be null, thus saving you from extra code logic to determine whether the properties are null.

ClientRoleOptions

The audienceLatencyLevel property in the ClientRoleOptions class changes from required to optional.

The constructor of the ClientRoleOptions class changes as follows:

Earlier than v4.0.5

new ClientRoleOptions(AudienceLatencyLevelType);

As of v4.0.5

new ClientRoleOptions(audienceLatencyLevel: AudienceLatencyLevelType);

DataStreamConfig

The following properties in the DataStreamConfig class change from optional to required:

  • syncWithAudio
  • ordered

The constructor of the DataStreamConfig class changes as follows:

Earlier than v4.0.5

new DataStreamConfig(syncWithAudio: true, ordered: true);

As of v4.0.5

new DataStreamConfig(true, true);

v4.0.1 (Native 3.4.2)

v4.0.1 was released on May 25, 2021.

Compatibility changes

Integration changes

  1. Null safety support

Since this version, Agora RTC Flutter SDK supports null safety. Because null safety is not backward compatible, you must ensure that the dart version is 2.12 or higher. See Flutter documentation for more information.

  1. Flutter 2.x support (Android and iOS only)

Since this version, Agora RTC Flutter SDK supports Flutter 2.x (Android and iOS only.)

  1. SDK package publishing platform (on Android only)

Because JCenter is about to retire, Agora publishes the RTC Android SDK package to JitPack instead of JCenter. Therefore, to build an Android application, add the following line in the /android/build.gradle file of your project:

allprojects {
    repositories {
        ...
        maven { url 'https://www.jitpack.io' }
    }
}
If the build fails, try replacing 'https://www.jitpack.io' with 'https://jitpack.io'.
  1. Extension libraries

To reduce the app size after integrating the SDK, this release packages some features as extension libraries (with the Extension suffix). For details, see Extension libraries. If you do not need to use the related features, you can remove the corresponding extension libraries and recompile the project.

Behavior changes

To monitor the reason why the playback state of a music file changes, this release modifies the AudioMixingStateChanged callback as follows:

  • Replaces the errorCode parameter with the reason parameter.
  • Deprecates AudioMixingErrorCode and replace it with AudioMixingReason. Using AudioMixingReason, you can get the reason for the change of the playback state, such as start, pause, stop or fail.
  • Modifies some logic of reporting AudioMixingStateCode. For example, as of this release, when looping music, the SDK triggers the Playing state when each loop is completed or starts.

If you upgrade the SDK to v4.0.1 or later, to avoid affecting your service, Agora recommends that you modify the implementation of AudioMixingStateChanged.

New features

1. Virtual metronome

To meet the needs of online teaching scenarios that would benefit from a metronome, this release adds the following methods:

  • startRhythmPlayer: Enables the virtual metronome.
  • stopRhythmPlayer: Disables the virtual metronome.
  • configRhythmPlayer: Reconfigures the virtual metronome after it is enabled.

2. Playback progress of audio effect files

To control the playback progress of audio effect files, this release adds the following methods or parameters:

  • setEffectPosition: Sets the playback position after starting playback of an audio effect file.
  • getEffectDuration: Gets the duration of a local audio effect file.
  • getEffectCurrentPosition: Gets current playback progress of an audio effect file.
  • startPos in playEffect: Sets the playback position when starting playback of an audio effect file.

Improvements

1. Local file path (on Android only)

To meet the requirements of Google Play Store, this release supports accessing a local file through URIs. When you call startAudioMixing, startAudioRecordingWithConfig, getAudioMixingDuration, preloadEffect, playEffect, getEffectDuration, or addVideoWatermark and need to access a local file, Agora recommends the following steps:

  1. Use Storage Access Framework to get the URI of the local file.
  2. Call Uri.toString to convert the URI to a string.
  3. Pass the string in the filePath or watermarkUrl parameter.

2. Video encoding

The Agora SDK allows you to use DegradationPreference to set the degradation preference of local video encoding under limited bandwidth, for example, reducing the video frame rate while maintaining video quality, or reducing the video quality while maintaining the video frame rate. As of this release, DegradationPreference can be set as Balanced, which reduces the video frame rate and video quality simultaneously to strike a balance between smoothness and video quality. Balanced is suitable for scenarios where both smoothness and video quality are a priority, such as one-to-one calls, one-to-one online teaching, and multi-user online meetings.

3. Playback progress of music files

To control the playback progress of music files, this release is optimized as follows:

  • Adds the startPos parameter in startAudioMixing, which allows you to set the playback position when starting playback of a music file.
  • Adds the filePath parameter in getAudioMixingDuration, which allows you to get the duration of a local music file before playing it.

4. Audio recording

To set the recording configuration during audio recording, this release adds the startAudioRecordingWithConfig method and deprecates the startAudioRecording method. The config parameter of startAudioRecordingWithConfig allows you to set the audio recording quality, content, sample rate, and storage path of the recording file.

This release also adds a new error code: AlreadyInRecording(160). If you call startAudioRecordingWithConfig again before the current recording ends, the SDK reports this error code.

5. Media device errors

To help users better understand the cause of local video errors, this release adds a new error code to LocalVideoStreamError: DeviceNotFound(8), which indicates that the SDK cannot find the local video-capture device.

Fixed issues

This release fixed the following issues:

  • Crashes occurred when the audio sample rate exceeded 4.8 kHz.
  • The AudioVolumeIndication callback returned incorrect volume information after you called enableSoundPositionIndication(true).
  • The local user would see the remote video upside down for an instant when the remote user switched between the front and rear cameras.
  • Crashes occurred in a certain voice conversion scenario.
  • Under extremely poor network conditions, the host's video sent from the Web clients was corrupted on the Native clients.
  • Remote users saw a distorted image when the local user minimized the shared screen with the genie effect on Mac devices.
  • Joining the channel occasionally failed when a user switched back to the app after keeping it in the background for a long time. (On iOS only)
  • The user interface of the application got stuck when you called destroy or the get method such as getCallId or getSdkVersion after calling setupLocalVideo or setupRemoteVideo. (On iOS only)
  • Occasional crashes. (On iOS only)
  • The received custom video frame was rotated under certain circumstances. (On Android only)

API changes

Added

Modified

Deprecated

  • startAudioRecording
  • AudioMixingErrorCode

v3.3.1

v3.3.1 was released on March 12, 2021.

Compatibility changes

This release deprecates setDefaultMuteAllRemoteAudioStreams and setDefaultMuteAllRemoteVideoStreamsand changes the behavior of mute-related methods as follows:

  • mute-related methods must be called after joining or switching to a channel; otherwise, the method call does not take effect.
  • Methods with the prefix muteAll are no longer the master switch, and each mute-related method independently controls the user's subscribing state. When you call methods with the prefixes muteAll and muteRemote together, the method that is called later takes effect.
  • Methods with the prefix muteAll set whether to subscribe to the audio or video streams of all remote users, including all subsequent users, which means methods with the prefix muteAll contain the function of methods with the prefix setDefaultMute. Agora recommends not calling methods with the prefixes muteAll and setDefaultMute together; otherwise, the setting may not take effect.

New features

1. Channel media options

To help developers control media subscription more flexibly, this release adds the options parameter to joinChannel and switchChannel methods to set whether users subscribe to all remote audio or video streams in a channel when joining and switching channels.

2. Cloud proxy

To improve the usability of the Agora Cloud Proxy, this release adds the setCloudProxy method to set the cloud proxy and allows you to select a cloud proxy that uses the UDP protocol. For details, see Cloud Proxy.

3. Deep-learning noise reduction

To eliminate non-stationary noise based on traditional noise reduction, this release adds enableDeepLearningDenoise to enable deep-learning noise reduction.

4. Singing beautifier

To beautify the voice and add reverberation effects in a singing scenario, this release adds the setVoiceBeautifierParameters method and adds the SingingBeautifier constant to VoiceBeautifierPreset.

You can call setVoiceBeautifierPreset(SingingBeautifier) to beautify the male voice and add the reverberation effect for a voice in a small room. For more settings, you can call setVoiceBeautifierParameters(SingingBeautifier, param1, param2) to beautify male or female voices and add reverberation effects for a voice in a small room, large room, or hall.

5. Log files

To ensure the integrity of log content, this release adds the createWithConfig method and adds the logConfig property to the log parameter. You can use logConfig to set the log files output by the Agora SDK when you initialize RtcEngine. See How can I set the log file? for details.

As of v3.3.1, Agora does not recommend using the setLogFile, setLogFileSize, or setLogFilter methods to set the log files.

6. Quality of captured video

To control the quality of video captured by the local camera, this release adds support for customizing the capture resolution and listening for abnormalities.

  • Customize the capture resolution: Call the setCameraCapturerConfiguration method to set the capture preference to Manual(3) and set the width and height of the captured video image.
  • Listen for abnormalities:
    • The abnormal brightness level of captured video images: Use captureBrightnessLevel in the localVideoStats callback.
    • The camera fails to output the captured video: Use the localVideoStateChanged(Failed, CaptureFailure) callback.
    • The camera repeatedly outputs the captured video: Use the localVideoStateChanged(Capturing, CaptureFailure) callback.

(iOS only) To improve the user experience, this release adds the following reasons for local video capture errors in the localVideoStateChanged callback:

  • CaptureInBackGround(6): The application is running in the background.
  • CaptureMultipleForegroundApps(7): The application is running in Slide Over, Split View, or Picture in Picture mode.

7. Data streams

To support scenarios such as lyrics synchronization and courseware synchronization, this release deprecates the previous createDataStream method and replaces it with createDataStreamWithConfig. You can use this new method to create a data stream and set whether to synchronize the data stream with the audio stream sent to the Agora channel and whether the received data is ordered.

8. Voice Conversion

This release adds the setVoiceConversionPreset method to set a voice conversion effect (to disguise a user's voice). You can use this method to make a male-sounding voice sound steady or deep, and a female-sounding voice sound gender-neutral or sweet.

Improvements

1. AES-GCM encryption mode

For scenarios requiring high security, to guarantee the confidentiality, integrity, and authenticity of data, and to improve the computational efficiency of data encryption, this release adds the following enumerators in EncryptionMode:

  • AES128GCM: 128-bit AES encryption, GCM mode.
  • AES256GCM: 256-bit AES encryption, GCM mode.
Once you enable the built-in encryption, all users in the same channel must use the same encryption mode and key, including the server-side users such as the Agora recording service.

2. Remote audio statistics

To monitor quality of experience (QoE) of the local user when receiving a remote audio stream, this release adds:

  • mosValue to remoteAudioStats, which reports the quality of the remote audio stream as determined by the Agora real-time audio MOS (Mean Opinion Score) measurement system.
  • qoeQuality and qualityChangedReason to remoteAudioStats, which report QoE of the local user and the reason for poor QoE, respectively.

Issues fixed

Android

  • The audio sampling failed on some Android devices after a headset was plugged in.
  • Local audio sampling occasionally failed on Android 10.
  • After enabling the sound position indication, you could not get the remote user's volume by the audioVolumeIndication callback.
  • Occasional abnormality with the hardware encoders on certain devices after continuously encoding key frames for a short period of time.

iOS

  • After enabling the sound position indication, you could not get the remote user's volume by the audioVolumeIndication callback.
  • Occasional crashes when you called enableLocalVideo(false) while the application window was switching to Slide Over, Split View, or Picture in Picture mode.

API changes

This release adds the following APIs:

Added

Deprecated

  • createWithAreaCode
  • setDefaultMuteAllRemoteVideoStreams
  • setDefaultMuteAllRemoteAudioStreams
  • setLogFile
  • setLogFileSize
  • setLogFilter
  • createDataStream

v3.2.1

v3.2.1 was released on December 23, 2020.

Compatibility changes

1. Cloud proxy

This release optimizes the Agora cloud proxy architecture. If you are already using cloud proxy, to avoid compatibility issues between the new SDK and the old cloud proxy, please contact support@agora.io before upgrading the SDK. See Cloud Proxy.

2. Security and compliance

Agora has passed ISO 27001, ISO 27017, and ISO 27018 international certifications, providing safe and reliable real-time interactive cloud services for users worldwide. See ISO Certificates.

This release supports transport layer encryption by adding TLS (Transport Layer Security) and UDP (User Datagram Protocol) encryption methods.

New features

Interactive live streaming standard

This release adds options in setClientRole for setting the latency level of an audience member. You can use this method to switch between Interactive Live Streaming Premium and Interactive Live Streaming Standard as follows:

  • Set the latency level as ultra low latency to use Interactive Live Streaming Premium.
  • Set the latency level as low latency to use Interactive Live Streaming Standard.

For details, see the product overview of Interactive Live Streaming Standard.

Improvements

1. Meeting scenario

To improve the audio experience for multi-person meetings, this release adds MEETING(8) in setAudioProfile.

2. Voice beautifier and audio effects

To improve the usability of the APIs related to voice beautifier and audio effects, this release deprecates setLocalVoiceChanger and setLocalVoiceReverbPreset, and adds the following methods instead:

  • setVoiceBeautifierPreset: Compared with setLocalVoiceChanger, this method deletes audio effects such as a little boy’s voice and a more spatially resonant voice.
  • setAudioEffectPreset: Compared with setLocalVoiceReverbPreset, this method adds audio effects such as the 3D voice, the pitch correction, a little boy’s voice and a more spatially resonant voice.
  • setAudioEffectParameters: This method sets detailed parameters for a specified audio effect. In this release, the supported audio effects are the 3D voice and pitch correction.

3. Interactive streaming delay

This release reduces the latency on the audience's client during an interactive live streaming by about 500 ms.

Issues fixed

Android

  • Occasional audio sampling issues with Xiaomi speakers.
  • When a remote user called with vivo X30, the local user saw a black screen.
  • When a remote user frequently joined and left a channel on an Android TV, the local user occasionally saw a black screen.
  • Crashes occurred when using IPv6.
  • After you called enableEncryption, the SDK did not trigger the firstLocalVideoFramePublished callback.
  • When Native clients integrated with the Agora Voice SDK interoperated with Web clients, the Web clients continuously reported the Client.on(disable-local-video) or Client.on(mute-video) callback.

iOS

  • On iPhone 5s and iPhone 6, after the user enabled the basic image enhancement function, the screen flickered when users switched between apps.
  • The stopChannelMediaRelay method did not take effect.
  • The SDK mistakenly returned the AdmStartRecording(1012) error.
  • Crashes occurred when using IPv6.
  • After you called enableEncryption, the SDK did not trigger the firstLocalVideoFramePublished callback.
  • When Native clients integrated with the Agora Voice SDK interoperated with Web clients, the Web clients continuously reported the Client.on(disable-local-video) or Client.on(mute-video) callback.

API changes

Added

Deprecated

  • setLocalVoiceChanger
  • setLocalVoiceReverbPreset

v3.1.2

v3.1.2 was released on September 30th, 2020.

Functions and features

  • Adapts to Agora RTC SDK v3.1.2.
  • Supports asynchronous programming with async/await.
  • Supports multiple channels.
  • Supports TextureView on Android platform.
  • Supports callbacks to report the current publishing and subscribing states, and whether the first audio or video frame is published.

Related documentation

See the following documentation to quickly integrate the SDK and implement real-time voice and video communication in your project.

Agora also provides an open-source Agora Flutter Quickstart on GitHub.

To improve user experience, this version disables the local network connection quality report by default, to prevent the prompt to find local network devices from popping up when an end user launches the app on an iOS 14.0 device. The gatewayRtt parameter in the RtcStats callback is disabled by default. Do not use gatewayRtt to obtain the round-trip delay between the client and the local router. See the FAQ for details.
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