Class ZegoExpressEngine

Available since: 1.1.0 Description: Forward audio and video streams from ZEGO RTC servers to custom CDN content distribution networks with high latency but support for high concurrent pull streams. Use cases: 1. It is often used in large-scale live broadcast scenes that do not have particularly high requirements for delay. 2. Since ZEGO RTC server itself can be configured to support CDN(content distribution networks), this function is mainly used by developers who have CDN content distribution services themselves. 3. This function supports dynamic relay to the CDN content distribution network, so developers can use this function as a disaster recovery solution for CDN content distribution services. When to call: After calling the [createEngine] function to create the engine. Restrictions: When the [enablePublishDirectToCDN] function is set to true to publish the stream straight to the CDN, then calling this function will have no effect. Caution: Removing URLs retweeted to CDN requires calling [removePublishCdnUrl], calling [stopPublishingStream] will not remove URLs publish to CDN. Related APIs: Remove URLs that are re-pushed to the CDN [removePublishCdnUrl].

Available since: 2.7.0 Description: ZEGO provides some technical previews or special customization functions in RTC business through this API. If you need to get the use of the function or the details, please consult ZEGO technical support. When to call: After [createEngine].

Available since: 1.16.0 Description: Creates a audio effect player instance. Use cases: When you need to play short sound effects, such as applause, cheers, etc., you can use audioEffectPlayer to achieve. When to call: It can be called after [createEngine]. Restrictions: Currently, a maximum of 1 instances can be created, after which it will return null. Related APIs: [destroyAudioEffectPlayer].

Available since: 2.1.0 Description: Creates a media player instance. Use case: It is often used to play media resource scenes, For example, play video files, push the video of media resources in combination with custom video acquisition, and the remote end can pull the stream for viewing. When to call: It can be called after the SDK by [createEngine] has been initialized. Restrictions: Currently, a maximum of 4 instances can be created, after which it will return null. Caution: The more instances of a media player, the greater the performance overhead on the device. Related APIs: User can call [destroyMediaPlayer] function to destroy a media player instance.

Available since: 1.16.0 Description: Destroys the specified audio effect player instance. When to call: It can be called after [createAudioEffectPlayer]. Restrictions: None. Related APIs: [createAudioEffectPlayer].

Available since: 2.1.0 Description: Destroys a media player instance. Related APIs: User can call [createMediaPlayer] function to create a media player instance.

Available since: 1.1.0 Description: Turning on echo cancellation, the SDK filters the collected audio data to reduce the echo component in the audio. Use case: When you need to reduce the echo to improve the call quality and user experience, you can turn on this feature. When to call: It needs to be called after [createEngine], before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Caution: The AEC function only supports the processing of sounds playbacked through the SDK, such as sounds played by the playing stream, media player, audio effect player, etc. Before this function is called, the SDK automatically determines whether to use AEC. Once this function is called, the SDK does not automatically determine whether to use AEC. Restrictions: None. Related APIs: Developers can use [enableHeadphoneAEC] to set whether to enable AEC when using headphones, and use [setAECMode] to set the echo cancellation mode.

Available since: 1.1.0 Description: After turning on this function, the SDK can automatically adjust the microphone volume to adapt to near and far sound pickups and keep the volume stable. Use case: When you need to ensure volume stability to improve call quality and user experience, you can turn on this feature. When to call: It needs to be called after [createEngine] and before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Note that the Mac needs to be called after [startPreview] and before [startPublishingStream]. Caution: Before this function is called, the SDK automatically determines whether to use AGC. Once this function is called, the SDK does not automatically determine whether to use AGC. Restrictions: None.

Available since: 1.1.0 Description: Enable the noise suppression can reduce the noise in the audio data and make the human voice clearer. Use case: When you need to suppress noise to improve call quality and user experience, you can turn on this feature. When to call: It needs to be called after [createEngine], before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Related APIs: This function has a better suppression effect on continuous noise (such as the sound of rain, white noise). If you need to turn on transient noise suppression, please use [enableTransientANS]. And the noise suppression mode can be set by [setANSMode]. Caution: Before this function is called, the SDK automatically determines whether to use ANS. Once this function is called, the SDK does not automatically determine whether to use ANS. Restrictions: None.

Available since: 1.1.0 Description: This function is used to control whether to use the audio collection device. When the audio collection device is turned off, the SDK will no longer occupy the audio device. Of course, if the stream is being published at this time, there is no audio data. Use cases: When the user never needs to use the audio, you can call this function to close the audio collection. Default value: The default is true. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: Turning off or turning on the microphone on the hardware is a time-consuming operation, and there is a certain performance overhead when the user performs frequent operations. [muteMicrophone] is generally recommended.

Available since: 1.1.0 Description: When developers do not have much need for beauty features, they can use this function to set some very simple beauty effects. When to call: It needs to be called after [createEngine]. Default value: When this function is not called, the beauty feature is not enabled by default. Related APIs: After turning on the beauty features, you can call the [setBeautifyOption] function to adjust the beauty parameters. Caution: This beauty feature is very simple and may not meet the developer’s expectations. It is recommended to use the custom video processing function [enableCustomVideoProcessing] or the custom video capture function [enableCustomVideoCapture] to connect the [ZegoEffects] AI SDK https://docs.zegocloud.com/article/9896 for best results. Restrictions: In the case of using the custom video capture function, since the developer has handle the video data capturing, the SDK is no longer responsible for the video data capturing, so this function is no longer valid. It is also invalid when using the custom video processing function. Note: This function is only available in ZegoExpressVideo SDK!

deprecated

Deprecated since 2.16.0, please use the [enableEffectsBeauty] function instead.

Available since: 1.1.0 Description: This function is used to control whether to start the capture of the camera. After the camera is turned off, the video capture will not be performed. At this time, there will be no video data for local preview and push streaming. Default value: The default is true which means the camera is turned on. When to call: After creating the engine [createEngine]. Restrictions: None. Caution: In the case of using the custom video capture function [enableCustomVideoCapture], since the developer has taken over the video data capture, the SDK is no longer responsible for the video data capture, but this function still affects whether to encode or not. Therefore, when developers use custom video capture, please ensure that the value of this function is true. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.10.0 Description: Enable custom audio IO function, support PCM, AAC format data. Use cases: If the developer wants to implement special functions (such as voice change, bel canto, etc.) through custom processing after the audio data is collected or before the remote audio data is drawn for rendering. When to call: It needs to be called before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager] to be effective. Restrictions: None.

Available since: 2.2.0 (Android/iOS/macOS native), 2.4.0 (Windows/macOS C++). Description: When the developer opens custom pre-processing, by calling [setCustomVideoProcessHandler] you can set the custom video pre-processing callback. Use cases: After the developer collects the video data by himself or obtains the video data collected by the SDK, if the basic beauty and watermark functions of the SDK cannot meet the needs of the developer (for example, the beauty effect cannot meet the expectations), the ZegoEffects SDK can be used to perform the video Some special processing, such as beautifying, adding pendants, etc., this process is the pre-processing of custom video. Default value: Off by default When to call: Must be set before calling [startPreview], [startPublishingStream], [createRealTimeSequentialDataManager]. If you need to modify the configuration, please call [logoutRoom] to log out of the room first, otherwise it will not take effect. Restrictions: None. Related APIs: Call the [setCustomVideoProcessHandler] function to set the callback before custom video processing. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 2.16.0 Description: Support basic beauty functions, including whiten, rosy, smooth, and sharpen. Use cases: It is often used in scenes such as video calls and live broadcasts. When to call: You must call [startEffectsEnv] to enable the beauty environment before calling this function. Default value: When this function is not called, the beauty effect is not enabled by default. Related APIs: You can call the [setBeautifyOption] function to adjust the beauty parameters. Caution: This beauty function is the basic function. If it does not meet the expectations of the developer, you can use the custom video pre-processing function [enableCustomVideoProcessing] or the custom video capture function [enableCustomVideoCapture] docking and constructing the AI ​​vision SDK [ZegoEffects] for best results. Restrictions: If this function is used on the Android platform, it only supports 5.0 and above, SDK version 21 and above. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 2.12.0 Description: When using H.265 encoding to push the stream, whether to enable the strategy of automatically degrading H.265 encoding to H.264 encoding under abnormal circumstances.After enabling automatic downgrade, when H.265 encoding is not supported or H.265 encoding fails, the SDK will try to downgrade and use H.264 encoding to push the stream.After turning off automatic downgrade, when H.265 encoding is not supported or H.265 encoding fails, the direct streaming fails. Use cases: In the Co-hosting and Showroom Live Streaming scenarios, use H265 encoding to push the stream to save CDN traffic without degrading the picture quality. Default Value: When this interface is not called, the default is yes, which means that H.265 encoding is turned on and automatically downgraded to H.264 encoding. When to call: After creating the engine, call the [startPublishingStream] function before pushing the stream. Related callbacks: When the H.265 encoding is automatically downgraded to the H.264 encoding strategy, the [onPublisherVideoEncoderChanged] callback will be triggered when the encoding method changes. Caution: When downgrading from H.265 to H.264 encoding occurs during the streaming process, if you are recording local video or cloud recording, multiple recording files will be generated, which needs to be dealt with.

Available since: 1.1.0 Description: Control whether hardware decoding is used when playing streams, with hardware decoding enabled the SDK will use the GPU for decoding, reducing CPU usage. Use cases: If developers find that the device heats up badly when playing large resolution audio and video streams during testing on some models, consider calling this function to enable hardware decoding. Default value: Hardware decoding is disabled by default when this interface is not called. When to call: This function needs to be called after [createEngine] creates an instance. Restrictions: None. Caution: Need to be called before calling [startPlayingStream], if called after playing the stream, it will only take effect after stopping the stream and re-playing it. Once this configuration has taken effect, it will remain in force until the next call takes effect.

Available since: 1.1.0 Description: Whether to use the hardware encoding function when publishing the stream, the GPU is used to encode the stream and to reduce the CPU usage. When to call: The setting can take effect before the stream published. If it is set after the stream published, the stream should be stopped first before it takes effect. Caution: Because hard-coded support is not particularly good for a few models, SDK uses software encoding by default. If the developer finds that the device is hot when publishing a high-resolution audio and video stream during testing of some models, you can consider calling this function to enable hard coding.

Available since: 1.1.0 Description: When [enableAEC] is used to turn on echo cancellation, it is only turned on when the speaker is used for mobile terminal equipment. Call this function if you need to turn echo cancellation on or off when using the headset. Use case: It is common when the mobile device is connected to a external sound card as the audio output source. In order to eliminate the echo in this case, you need to call this function to turn on the echo cancellation. Default value: Android is off by default and iOS is on by default. When to call: It needs to be called after [createEngine], before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Caution: Turning on echo cancellation will increase the ear return delay. On the iOS platform, the SDK cannot distinguish between the headset and the external sound card. If you use this function to turn off the system echo cancellation when using the headset, the sound played by the external sound card will be collected when the user accesses the external sound card. Restrictions: None. Related APIs: When the headset is not used, you can set whether the SDK turns on echo cancellation through [enableAEC]. Platform differences: Only supports iOS and Android.

Available since: 1.9.0 Description: Enable/Disable headphone monitor, and users hear their own voices as they use the microphone to capture sounds. When to call: After the engine is created [createEngine]. Default value: Disable. Caution:

1. This setting does not actually take effect until both the headset and microphone are connected.
2. The default is to return after acquisition and before pre-processing. If you need to return after pre-processing, please contact ZEGO technical support.

Available since: 1.5.0 Description: Whether to publish streams directly from the client to CDN without passing through Zego RTC server. Use cases: It is often used in large-scale live broadcast scenes that do not have particularly high requirements for delay. Default value: The default is false, and direct push is not enabled. When to call: After creating the engine [createEngine], before starting to push the stream [startPublishingStream]. Caution: The Direct Push CDN feature does not pass through the ZEGO Real-Time Audio and Video Cloud during network transmission, so you cannot use ZEGO's ultra-low latency audio and video services. Related APIs: Dynamic re-push to CDN function [addPublishCdnUrl], [removePublishCdnUrl].

Available since: 1.8.0 Description: You can get the current audio codec, bit rate, and audio channel through this function. When to call: After the engine is created [createEngine]. Restrictions: None. Related APIs: [setAudioConfig].

Available since: 1.1.0 Description: Audio routing refers to the audio output device that an app uses to play audio, and common audio routes are: speakers, handsets, headphones, Bluetooth devices, and so on. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: Set audio route to speaker [setAudioRouteToSpeaker].

Available since: 2.9.0 Description: Obtain synchronization network time(NTP), including timestamp and maximum deviation. Use cases: When performing multi-terminal synchronization behaviors, network time synchronization is required. When to call: It needs to be called after [createEngine]. Restrictions: None.

This function can be used to get the specified publish channel's current video frame rate, bit rate, video capture resolution, and video encoding output resolution. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: Used to determine whether the microphone is set to mute. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: [muteMicrophone].

Available since: 1.1.0 Description: Used to determine whether the audio output is muted. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: [muteSpeaker].

Available since: 2.12.0 Description: Whether the specified video decoding is supported depends on the following aspects: whether the hardware model supports hard decoding, whether the performance of the hardware model supports soft decoding, and whether the SDK includes the decoding module. When to call: After creating the engine. Caution: It is recommended that users call this interface to obtain the H.265 decoding support capability before pulling the H.265 stream. If it is not supported, the user can pull the stream of other encoding formats, such as H.264.

Available since: 2.12.0 and above Description: Whether the specified video encoding is supported depends on the following aspects, whether the hardware model supports hard encoding, whether the performance of the hardware model supports soft encoding, and whether the SDK has the encoding module. When to call: After creating the engine. Caution: It is recommended that users call this interface to obtain H.265 encoding support capability before publish stream with H.265 encoding, if not supported, you can use other encodings for publish, such as H.264.On the mobile platform, the SDK only supports H.265 hardware encoding, and it is affected by the model and hardware capabilities. You need to call the [enableHardwareEncoder] function to enable hardware encoding, and then use this function to determine whether H.265 hardware encoding is supported.

Available since: 2.18.0 Description: If the room does not exist, [loginRoom] creates and logs in the room. SDK uses the 'room' to organize users. After users log in to a room, they can use interface such as push stream [startPublishingStream], pull stream [startPlayingStream], send and receive broadcast messages [sendBroadcastMessage], etc. To prevent the app from being impersonated by a malicious user, you can add authentication before logging in to the room, that is, the [token] parameter in the ZegoRoomConfig object passed in by the [config] parameter. Use cases: In the same room, users can conduct live broadcast, audio and video calls, etc. When to call /Trigger: This interface is called after [createEngine] initializes the SDK. Restrictions: For restrictions on the use of this function, please refer to https://docs.zegocloud.com/article/7611 or contact ZEGO technical support. Caution:

1. Apps that use different appIDs cannot intercommunication with each other.
2. SDK supports startPlayingStream audio and video streams from different rooms under the same appID, that is, startPlayingStream audio and video streams across rooms. Since ZegoExpressEngine's room related callback notifications are based on the same room, when developers want to startPlayingStream streams across rooms, developers need to maintain related messages and signaling notifications by themselves.
3. It is strongly recommended that userID corresponds to the user ID of the business APP, that is, a userID and a real user are fixed and unique, and should not be passed to the SDK in a random userID. Because the unique and fixed userID allows ZEGO technicians to quickly locate online problems.
4. After the first login failure due to network reasons or the room is disconnected, the default time of SDK reconnection is 20min.
5. After the user has successfully logged in to the room, if the application exits abnormally, after restarting the application, the developer needs to call the logoutRoom interface to log out of the room, and then call the loginRoom interface to log in to the room again. Privacy reminder: Please do not fill in sensitive user information in this interface, including but not limited to mobile phone number, ID number, passport number, real name, etc. Related callbacks:
6. When the user starts to log in to the room, the room is successfully logged in, or the room fails to log in, the [onRoomStateChanged] (Not supported before 2.18.0, please use [onRoomStateUpdate]) callback will be triggered to notify the developer of the status of the current user connected to the room.
7. Different users who log in to the same room can get room related notifications in the same room (eg [onRoomUserUpdate], [onRoomStreamUpdate], etc.), and users in one room cannot receive room signaling notifications in another room.
8. If the network is temporarily interrupted due to network quality reasons, the SDK will automatically reconnect internally. You can get the current connection status of the local room by listening to the [onRoomStateChanged] (Not supported before 2.18.0, please use [onRoomStateUpdate]) callback method, and other users in the same room will receive [onRoomUserUpdate] callback notification.
9. Messages sent in one room (e.g. [setStreamExtraInfo], [sendBroadcastMessage], [sendBarrageMessage], [sendCustomCommand], etc.) cannot be received callback ((eg [onRoomStreamExtraInfoUpdate], [onIMRecvBroadcastMessage], [onIMRecvBarrageMessage], [onIMRecvCustomCommand], etc) in other rooms. Currently, SDK does not provide the ability to send messages across rooms. Developers can integrate the SDK of third-party IM to achieve. Related APIs:
10. Users can call [logoutRoom] to log out. In the case that a user has successfully logged in and has not logged out, if the login interface is called again, the console will report an error and print the error code 1002001.
11. SDK supports multi-room login, please call [setRoomMode] function to select multi-room mode before engine initialization, and then call [loginRoom] to log in to multi-room.
12. Calling [destroyEngine] will also automatically log out.

Available since: 1.1.0 Description: This API will log out the room named roomID. Use cases: In the same room, users can conduct live broadcast, audio and video calls, etc. When to call /Trigger: After successfully logging in to the room, if the room is no longer used, the user can call the function [logoutRoom]. Restrictions: None. Caution: 1. Exiting the room will stop all publishing and playing streams for user, and inner audio and video engine will stop, and then SDK will auto stop local preview UI. If you want to keep the preview ability when switching rooms, please use the [switchRoom] method. 2. If the user logs in to the room, but the incoming 'roomID' is different from the logged-in room name, SDK will return failure. Related callbacks: After calling this function, you will receive [onRoomStateChanged] (Not supported before 2.18.0, please use [onRoomStateUpdate]) callback notification successfully exits the room, while other users in the same room will receive the [onRoomUserUpdate] callback notification(On the premise of enabling isUserStatusNotify configuration). Related APIs: Users can use [loginRoom], [switchRoom] functions to log in or switch rooms.

Available since: 2.4.0 Description: In the process of real-time audio and video interaction, local users can use this function to control whether to receive audio data from all remote users when pulling streams (including the audio streams pushed by users who have newly joined the room after calling this function). By default, users can receive audio data pushed by all remote users after joining the room. When the developer does not receive the audio receipt, the hardware and network overhead can be reduced. Use cases: Call this function when developers need to quickly close and restore remote audio. Compared to re-flow, it can greatly reduce the time and improve the interactive experience. When to call: This function can be called after calling [createEngine]. Related APIs: You can call the [mutePlayStreamAudio] function to control whether to receive a single piece of audio data. When the two functions [muteAllPlayStreamAudio] and [mutePlayStreamAudio] are set to false at the same time, the local user can receive the audio data of the remote user when the stream is pulled: 1. When the [muteAllPlayStreamAudio(true)] function is called, it takes effect globally, that is, local users will be prohibited from receiving audio data from all remote users. At this time, the [mutePlayStreamAudio] function will not take effect no matter if the [mutePlayStreamAudio] function is called before or after [muteAllPlayStreamAudio]. 2. When the [muteAllPlayStreamAudio(false)] function is called, the local user can receive the audio data of all remote users. At this time, the [mutePlayStreamAudio] function can be used to control whether to receive a single audio data. Calling the [mutePlayStreamAudio(true, streamID)] function allows the local user to receive audio data other than the streamID; calling the [mutePlayStreamAudio(false, streamID)] function allows the local user to receive all audio data.

Available since: 2.4.0 Description: In the process of real-time video and video interaction, local users can use this function to control whether to receive all remote users' video data when pulling the stream (including the video stream pushed by the new user who joins the room after calling this function). By default, users can receive video data pushed by all remote users after joining the room. When the developer does not receive the audio receipt, the hardware and network overhead can be reduced. Use cases: This function can be called when developers need to quickly close and resume watching remote video. Compared to re-flow, it can greatly reduce the time and improve the interactive experience. When to call: This function can be called after calling [createEngine]. Caution: When you mute the video stream, the view remains at the last frame by default, if you need to clear the last frame, please contact ZEGO technical support. Related APIs: You can call the [mutePlayStreamVideo] function to control whether to receive a single piece of video data. When the two functions [muteAllPlayStreamVideo] and [mutePlayStreamVideo] are set to false at the same time, the local user can receive the video data of the remote user when the stream is pulled: 1. When the [muteAllPlayStreamVideo(true)] function is called, it will take effect globally, that is, the local user will be prohibited from receiving all remote users' video data. At this time, the [mutePlayStreamVideo] function will not take effect whether it is called before or after [muteAllPlayStreamVideo]. 2. When the [muteAllPlayStreamVideo(false)] function is called, the local user can receive the video data of all remote users. At this time, the [mutePlayStreamVideo] function can be used to control whether to receive a single video data. Call the [mutePlayStreamVideo(true, streamID)] function, the local user can receive other video data other than the streamID; call the [mutePlayStreamVideo(false, streamID)] function, the local user can receive all the video data. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: This function is used to control whether to use the collected audio data. Mute (turn off the microphone) will use the muted data to replace the audio data collected by the device for streaming. At this time, the microphone device will still be occupied. Default value: The default is false, which means no muting. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: Developers who want to control whether to use microphone on the UI should use this function to avoid unnecessary performance overhead by using the [enableAudioCaptureDevice]. You can use [isMicrophoneMuted] to check if the microphone is muted.

Available since: 1.1.0 Description: In the process of real-time audio and video interaction, local users can use this function to control whether to receive audio data from designated remote users when pulling streams as needed. When the developer does not receive the audio receipt, the hardware and network overhead can be reduced. Use cases: Call this function when developers need to quickly close and restore remote audio. Compared to re-flow, it can greatly reduce the time and improve the interactive experience. When to call: This function can be called after calling [createEngine]. Caution: This function is valid only when the [muteAllPlayStreamAudio] function is set to false. Related APIs: You can call the [muteAllPlayStreamAudio] function to control whether to receive all audio data. When the two functions [muteAllPlayStreamAudio] and [mutePlayStreamAudio] are set to false at the same time, the local user can receive the audio data of the remote user when the stream is pulled: 1. When the [muteAllPlayStreamAudio(true)] function is called, it is globally effective, that is, local users will be prohibited from receiving all remote users' audio data. At this time, the [mutePlayStreamAudio] function will not take effect whether it is called before or after [muteAllPlayStreamAudio].2. When the [muteAllPlayStreamAudio(false)] function is called, the local user can receive the audio data of all remote users. At this time, the [mutePlayStreamAudio] function can be used to control whether to receive a single audio data. Calling the [mutePlayStreamAudio(true, streamID)] function allows the local user to receive audio data other than the streamID; calling the [mutePlayStreamAudio(false, streamID)] function allows the local user to receive all audio data.

Available since: 1.1.0 Description: In the process of real-time video and video interaction, local users can use this function to control whether to receive video data from designated remote users when pulling streams as needed. When the developer does not receive the audio receipt, the hardware and network overhead can be reduced. Use cases: This function can be called when developers need to quickly close and resume watching remote video. Compared to re-flow, it can greatly reduce the time and improve the interactive experience. When to call: This function can be called after calling [createEngine]. Caution: This function is valid only when the [muteAllPlayStreamVideo] function is set to false. When you mute the video stream, the view remains at the last frame by default, if you need to clear the last frame, please contact ZEGO technical support. Related APIs: You can call the [muteAllPlayStreamVideo] function to control whether to receive all video data. When the two functions [muteAllPlayStreamVideo] and [mutePlayStreamVideo] are set to false at the same time, the local user can receive the video data of the remote user when the stream is pulled: 1. When the [muteAllPlayStreamVideo(true)] function is called, it will take effect globally, that is, local users will be prohibited from receiving all remote users' video data. At this time, the [mutePlayStreamVideo] function will not take effect whether it is called before or after [muteAllPlayStreamVideo]. 2. When the [muteAllPlayStreamVideo(false)] function is called, the local user can receive the video data of all remote users. At this time, the [mutePlayStreamVideo] function can be used to control whether to receive a single video data. Call the [mutePlayStreamVideo(true, streamID)] function, the local user can receive other video data other than the streamID; call the [mutePlayStreamVideo(false, streamID)] function, the local user can receive all the video data. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: This function can be called when publishing the stream to realize not publishing the audio data stream. The SDK still collects and processes the audio, but send muted audio frame packets to the network. When to call: Called after the engine is created [createEngine] can take effect. Restrictions: None. Related callbacks: If you stop sending audio streams, the remote user that play stream of local user publishing stream can receive Mute status change notification by monitoring [onRemoteMicStateUpdate] callbacks. Related APIs: [mutePublishStreamVideo].

Available since: 1.1.0 Description: This function can be called when publishing the stream to realize not publishing the video stream. The local camera can still work normally, can capture, preview and process video images normally, but does not send the video data to the network. When to call: Called after the engine is created [createEngine] can take effect. Restrictions: None. Related callbacks: If you stop sending video streams locally, the remote user that play stream of local user publishing stream can receive Mute status change notification by monitoring [onRemoteCameraStateUpdate] callbacks. Related APIs: [mutePublishStreamAudio]. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: After mute speaker, all the SDK sounds will not play, including playing stream, mediaplayer, etc. But the SDK will still occupy the output device. Default value: The default is false, which means no muting. When to call: After creating the engine [createEngine]. Restrictions: None.

Available since: 1.1.0 Description: When a CDN forwarding address has been added via [addPublishCdnUrl], this function is called when the stream needs to be stopped. When to call: After calling the [createEngine] function to create the engine, When you don't need to continue publish to the CDN. Restrictions: When the [enablePublishDirectToCDN] function is set to true to publish the stream straight to the CDN, then calling this function will have no effect. Caution: This function does not stop publishing audio and video stream to the ZEGO ZEGO RTC server. Related APIs: Add URLs that are re-pushed to the CDN [addPublishCdnUrl].

Available since: 2.8.0 Description: After the developer receives [onRoomTokenWillExpire], they can use this API to update the token to ensure that the subsequent RTC functions are normal. Use cases: Used when the token is about to expire. When to call /Trigger: After the developer receives [onRoomTokenWillExpire]. Restrictions: None. Caution: The token contains important information such as the user's room permissions, publish stream permissions, and effective time, please refer to https://docs.zegocloud.com/article/11649. Related callbacks: None. Related APIs: None.

Available since: 1.5.0 Description: Send a barrage message to the room, users who have logged in to the same room can receive the message, the message is unreliable. Use cases: Generally used in scenarios where there is a large number of messages sent and received in the room and the reliability of the messages is not required, such as live barrage. When to call: After calling [loginRoom] to log in to the room. Restrictions: The frequency of sending barrage messages in the same room cannot be higher than 20 messages/s. For restrictions on the use of this function, please contact ZEGO technical support. Related callbacks: The room barrage message can be received through [onIMRecvBarrageMessage]. Related APIs: Broadcast messages can be sent through the [sendBroadcastMessage] function, and custom command can be sent through the [sendCustomCommand] function.

Available since: 1.2.1 Description: Send a broadcast message to the room, users who have entered the same room can receive the message, and the message is reliable. Use cases: Generally used when the number of people in the live room does not exceed 500. When to call: After calling [loginRoom] to log in to the room. Restrictions: It is not supported when the number of people online in the room exceeds 500. If you need to increase the limit, please contact ZEGO technical support to apply for evaluation. The frequency of sending broadcast messages in the same room cannot be higher than 10 messages/s. The maximum QPS for a single user calling this interface from the client side is 2. For restrictions on the use of this function, please contact ZEGO technical support. Related callbacks: The room broadcast message can be received through [onIMRecvBroadcastMessage]. Related APIs: Barrage messages can be sent through the [sendBarrageMessage] function, and custom command can be sent through the [sendCustomCommand] function.

Available since: 1.2.1 Description: After calling this function, users in the same room who have entered the room can receive the message, the message is unreliable. Use cases: Generally used in scenarios where there is a large number of messages sent and received in the room and the reliability of the messages is not required, such as live barrage. When to call: After calling [loginRoom] to log in to the room. Restrictions: Generally used when the number of people in the live room does not exceed 500.The frequency of sending barrage messages in the same room cannot be higher than 20 messages/s. For restrictions on the use of this function, please contact ZEGO technical support. Related callbacks: The room custom command can be received through [onIMRecvCustomCommand]. Related APIs: Broadcast messages can be sent through the [sendBroadcastMessage] function, and barrage messages can be sent through the [sendBarrageMessage] function. Privacy reminder: Please do not fill in sensitive user information in this interface, including but not limited to mobile phone number, ID number, passport number, real name, etc.

Available since: 1.1.0 Description: While pushing the stream to transmit the audio and video stream data, the stream media enhancement supplementary information is sent to synchronize some other additional information. Use cases: Generally used in scenes such as synchronizing music lyrics or precise video layout, you can choose to send SEI. When to call: After starting to push the stream [startPublishingStream]. Restrictions: Do not exceed 30 times per second, and the SEI data length is limited to 4096 bytes. Caution: Since the SEI information follows the video frame, there may be frame loss due to network problems, so the SEI information may also be lost. In order to solve this situation, it should be sent several times within the restricted frequency. Related APIs: After the pusher sends the SEI, the puller can obtain the SEI content by monitoring the callback of [onPlayerRecvSEI].

Available since: 1.1.0 Description: When [enableAEC] is used to enable echo cancellation, this function can be used to switch between different echo cancellation modes to control the degree of echo cancellation. Use case: When the default echo cancellation effect does not meet expectations, this function can be used to adjust the echo cancellation mode. Default value: When this function is not called, the default echo cancellation mode is [Aggressive]. When to call: It needs to be called after [createEngine], before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Restrictions: The value set by this function is valid only after the echo cancellation function is turned on.

Available since: 1.1.0 Description: When [enableANS] is used to enable noise suppression, this function can be used to switch between different noise suppression modes to control the degree of noise suppression. Use case: When the default noise suppression effect does not meet expectations, this function can be used to adjust the noise suppression mode. Default value: When this function is not called, the default echo cancellation mode is [Medium]. When to call: It needs to be called after [createEngine], before [startPublishingStream], [startPlayingStream], [startPreview], [createMediaPlayer], [createAudioEffectPlayer] and [createRealTimeSequentialDataManager]. Restrictions: The value set by this function is valid only after the noise suppression function is turned on.

Available since: 2.3.0 Description: Set the sound size of the stream, the local user can control the playback volume of the audio stream. When to call: after called [startPlayingStream]. Restrictions: None. Related APIs: [setPlayVolume] Set the specified streaming volume. Caution: You need to reset after [stopPlayingStream] and [startPlayingStream]. Set the specified streaming volume and [setAllPlayStreamVolume] interface to override each other, and the last call takes effect.

Available since: 1.1.0 Description: Set the video orientation. Use cases: When users use mobile devices to conduct live broadcasts or video calls, they can set different video directions according to the scene. When to call: After [createEngine]. Restrictions: None. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.3.4 Description: You can set the combined value of the audio codec, bit rate, and audio channel through this function. If the preset value cannot meet the developer's scenario, the developer can set the parameters according to the business requirements. Default value: The default audio config refers to the default value of [ZegoAudioConfig]. When to call: After the engine is created [createEngine], and before publishing [startPublishingStream]. Restrictions: None. Related APIs: [getAudioConfig].

Available since: 1.12.0 Description: Call this function to set the sound equalizer adjust the tone. Use cases: Often used in voice chatroom, KTV. When to call: It needs to be called after [createEngine]. Restrictions: None.

Available since: 1.1.0 Description: Whether to use the speaker to play audio, when you choose not to use the built-in speaker to play the sound, the SDK will select the audio output device with the highest current priority to play the sound according to the system schedule, and common audio routes are: handsets, headphones, Bluetooth devices, and so on. When to call: After creating the engine [createEngine]. Restrictions: None. Related APIs: Get the current audio route [getAudioRouteType].

Available since: 3.1.0 Description: Set audio capture source for switching between different audio capture sources. Use cases: Typically used in educational scenarios that require switching between different audio capture sources. When to call: After the engine is created [createEngine]. Caution: 1. Main push channel ZegoPublishChannel.Main does not support using ZegoAudioSourceType.MediaPlayer and ZegoAudioSourceType.MainPublishChannel audio source type. 2. When using ZegoAudioSourceType.MediaPlayer and ZegoAudioSourceType.MainPublishChannel audio source type in aux publish channel ZegoPublishChannel.Aux, must ensure that physical device works on main publish channel ZegoPublishChannel.Main

Available since: 1.1.0 Description: set beautify option for main publish channel. Use cases: Often used in video call, live broadcasting. When to call: It needs to be called after [createEngine]. Restrictions: None. Caution: In the case of using a custom video capture function, because the developer has taken over the video data capturing, the SDK is no longer responsible for the video data capturing, call this function will not take effect. When using custom video processing, the video data collected by the SDK will be handed over to the business for further processing, call this function will not take effect either. Note: This function is only available in ZegoExpressVideo SDK!

deprecated

Deprecated since 2.16.0, please use the [setEffectsBeautyParam] function instead.

Available since: 1.13.0 Description: This function is used to perform gain processing based on the device's collected volume. The local user can control the sound level of the audio stream sent to the remote end. Default value: Default is 100. When to call: After creating the engine [createEngine]. Restrictions: The capture volume can be dynamically set during publishing. Related APIs: Set the playing stream volume [setPlayVolume].

Available since: 2.16.0 Description: Set the beauty parameters, including whiten, rosy, smooth, and sharpen. Use cases: It is often used in scenes such as video calls and live broadcasts. When to call: You must call [startEffectsEnv] to enable the beauty environment before calling this function. Related APIs: You can call [enableEffectsBeauty] to turn on or off the beauty function. Restrictions: This function only supports Android system 5.0 and above, Android SDK version 21 and above. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 2.13.0 Description: Call this function to turn on or off the electronic sound effect. Use cases: Often used in live broadcasting, voice chatroom and sung unaccompanied scenes. Default value: When this function is not called, the electronic sound effect is not enabled by default. When to call: It needs to be called after [createEngine]. Restrictions: None. Caution: When the mode parameter is Harmonic Minor, the tonal parameter does not take effect. Related APIs: Common electronic sound effect configurations can be set via [setVoiceChangerPreset].

Available since: 2.3.0 Description: When the publish stream sets the codecID to SVC through [setVideoConfig], the puller can dynamically set and select different stream types (small resolution is one-half of the standard layer). Use cases: In general, when the network is weak or the rendered UI window is small, you can choose to pull videos with small resolutions to save bandwidth. When to call: before or after called [startPlayingStream]. Restrictions: None. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.16.0 Description: Set the sound size of the stream, the local user can control the playback volume of the audio stream. When to call: after called [startPlayingStream]. Restrictions: None. Related APIs: [setAllPlayStreamVolume] Set all stream volume. Caution: You need to reset after [stopPlayingStream] and [startPlayingStream]. This function and the [setAllPlayStreamVolume] function overwrite each other, and the last call takes effect.

Available since: 1.10.0 Description: Call this function to set preset reverb effect. Use cases: Often used in live broadcasting, voice chatroom and KTV. When to call: It needs to be called after [createEngine]. Restrictions: Reverb effect is only effective for SDK captured sound. Caution: Different values dynamically set during publishing stream will take effect. When all parameters are set to 0, the reverberation is turned off. Related APIs: [setReverbPreset] provide a set of preset reverb effects. If you need advanced reverb/echo/voice changer effect, please use [setReverbAdvancedParam], [setReverbEchoParam], [setVoiceChangerParam] together.

Available since: 1.17.0 Description: Call this function to set reverb echo effect. This function can be used with voice changer and reverb to achieve a variety of custom sound effects. Use cases: Often used in live broadcasting, voice chatroom and KTV. When to call: It needs to be called after [createEngine]. Restrictions: Reverb echo effect is only effective for SDK captured sound. Related APIs: If you need advanced reverb/echo/voice changer effect, please use [setReverbAdvancedParam], [setReverbEchoParam], [setVoiceChangerParam] together.

Available since: 1.17.0 Description: Call this function to set preset reverb effect. Use cases: Often used in live broadcasting, voice chatroom and KTV. When to call: It needs to be called after [createEngine]. Support call this function to change preset reverb effect during publishing stream. Restrictions: Reverb effect is only effective for SDK captured sound. Related APIs: If you need advanced reverb effect, please use [setReverbAdvancedParam]. This function is mutually exclusive with [setVoiceChangerPreset]. If used at the same time, it will produce undefined effects. If you need advanced reverb/echo/voice changer effect, please use [setReverbAdvancedParam], [setReverbEchoParam], [setVoiceChangerParam] together.

Available since: 1.13.0 Description: The user can call this function to set the extra info of the room. Use cases: You can set some room-related business attributes, such as whether someone is Co-hosting. When to call /Trigger: After logging in the room successful. Restrictions: For restrictions on the use of this function, please refer to https://docs.zegocloud.com/article/7611 or contact ZEGO technical support. Caution: 'key' is non null. The length of key and value is limited, please refer to Restrictions. The newly set key and value will overwrite the old setting. Related callbacks: Other users in the same room will be notified through the [onRoomExtraInfoUpdate] callback function. Related APIs: None.

Available since: 1.1.0 Description: Use this function to set the extra info of the stream. The stream extra information is an extra information identifier of the stream ID. Unlike the stream ID, which cannot be modified during the publishing process, the stream extra information can be modified midway through the stream corresponding to the stream ID. Developers can synchronize variable content related to stream IDs based on stream additional information. When to call: After the engine is created [createEngine], Called before and after [startPublishingStream] can both take effect. Restrictions: None. Related callbacks: Users can obtain the execution result of the function through [ZegoPublisherSetStreamExtraInfoCallback] callback.

Available since: 1.1.0 Description: Set the video frame rate, bit rate, video capture resolution, and video encoding output resolution. Default value: The default video capture resolution is 360p, the video encoding output resolution is 360p, the bit rate is 600 kbps, and the frame rate is 15 fps. When to call: After [createEngine]. Restrictions: It is necessary to set the relevant video configuration before publishing the stream or startPreview, and only support the modification of the encoding resolution and the bit rate after publishing the stream. Caution: Developers should note that the wide and high resolution of the mobile end is opposite to the wide and high resolution of the PC. For example, in the case of 360p, the resolution of the mobile end is 360x640, and the resolution of the PC end is 640x360. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: Set whether the local preview video and the published video have mirror mode enabled. For specific mirroring mode. When to call: After [createEngine]. Restrictions: This setting only works if the SDK is responsible for rendering. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 3.1.0 Description: Set video capture source for switching between different video capture sources. Use cases: Typically used in educational scenarios that require switching between different video capture sources. When to call: After the engine is created [createEngine]. Restrictions: None. Caution: 1. Main push channel ZegoPublishChannel.Main does not support using ZegoVideoSourceType.Player and ZegoVideoSourceType.MainPublishChannel video source type. 2. When using ZegoVideoSourceType.Player and ZegoVideoSourceType.MainPublishChannel video source type in aux publish channel ZegoPublishChannel.Aux, must ensure that physical device works on main publish channel ZegoPublishChannel.Main Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.10.0 Description: Call this function to set custom voice changer effect. Use cases: Often used in live broadcasting, voice chatroom and KTV. When to call: It needs to be called after [createEngine]. Restrictions: Voice changer effect is only effective for SDK captured sound. Related APIs: [setVoiceChangerPreset] provide a set of preset voice changer effects. If you need advanced reverb/echo/voice changer effect, please use [setReverbAdvancedParam], [setReverbEchoParam], [setVoiceChangerParam] together.

Available since: 1.17.0 Description: Call this function to use preset voice changer effect. Use cases: Often used in live broadcasting, voice chatroom and KTV. When to call: It needs to be called after [createEngine]. Restrictions: Voice changer effect is only effective for SDK captured sound. Related APIs: If you need advanced voice changer effect, please use [setVoiceChangerParam]. This function is mutually exclusive with [setReverbPreset]. If used at the same time, it will produce undefined effect. Using ANDROID/ETHEREAL preset voice changer effect will modify reverberation or reverberation echo parameters. Calling [setVoiceChangerParam], [setReverbAdvancedParam], [setReverbEchoParam] may affect the voice changer effect after use these preset voice changer effect. If you need advanced reverb/echo/electronic effects/voice changer effect, please use [setReverbAdvancedParam], [setReverbEchoParam], [setElectronicEffects], [setVoiceChangerParam] together.

Available since: 2.16.0 Description: Enable the Effects beauty environment. The SDK uses the specified video frame data type for transmission. The Windows platform only supports video frame raw data, the Apple platform only supports CVPixelBuffer, and the Android platform only supports texture2d. Use cases: It is often used in scenes such as video calls and live broadcasts. Default value: When this function is not called, the beauty environment is not activated by default. When to call: Must be called before calling [startPreview], [startPublishingStream]. If you need to modify the configuration, please call [logoutRoom] to log out of the room first, otherwise it will not take effect. Related APIs: [enableEffectsBeauty] switch beauty, [setEffectsBeautyParam] set beauty parameters. Caution: This beauty function is the basic function. If it does not meet the expectations of the developer, you can use the custom video pre-processing function [enableCustomVideoProcessing] or the custom video capture function [enableCustomVideoCapture] docking and constructing the AI ​​vision SDK [ZegoEffects] https://doc-zh.zego.im/article/9556 for best results. Restrictions: This function only supports Android system 5.0 and above, Android SDK version 21 and above. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.2.1 Description: Initiate a mixing stream request to the ZEGO RTC server, the server will look for the stream currently being pushed, and mix the layers according to the parameters of the mixing stream task requested by the SDK. When you need to update a mixing task, that is, when the input stream increases or decreases, you need to update the input stream list. At this time, you can update the field of the [ZegoMixerTask] object inputList and call this function again to pass in the same [ZegoMixerTask] object to update the mixing task. Use cases: It is often used when multiple video images are required to synthesize a video using mixed streaming, such as education, live broadcast of teacher and student images. When to call: After calling [loginRoom] to log in to the room. Restrictions: None. Caution: Due to the performance considerations of the client device, the SDK muxing is to start the mixing task on the ZEGO RTC server for mixing. If an exception occurs when the mixing task is requested to start, for example, the most common mixing input stream does not exist, the error code will be given from the callback callback. If a certain input stream does not exist in the middle, the muxing task will automatically retry to pull this input stream for 90 seconds, and will not retry after 90 seconds. If all input streams no longer exist, the server will automatically stop the mixing task after 90 seconds. Related callbacks: [OnMixerRelayCDNStateUpdate] can be used to obtain the CDN status update notification of the mixed stream repost, and the sound update notification of each single stream in the mixed stream can be obtained through [onMixerSoundLevelUpdate]. Related APIs: the mixing task can be stopped by the [stopMixerTask] function.

Available since: 1.20.0 Description: This function supports uplink/downlink network speed test when the network can be connected. Use cases: This function can be used to detect whether the network environment is suitable for pushing/pulling streams with specified bitrates. When to call: It needs to be called after [loginRoom], and before [startPublishingStream]. If you call [startPublishingStream] while speed testing, the speed test will automatically stop. Restrictions: The maximum allowable test time for a single network speed test is 3 minutes. Caution: Developers can register [onNetworkSpeedTestQualityUpdate] callback to get the speed test result, which will be triggered every 3 seconds. If an error occurs during the speed test process, [onNetworkSpeedTestError] callback will be triggered. If this function is repeatedly called multiple times, the last functioh call's configuration will be used. Related APIs: Call [stopNetworkSpeedTest] to stop network speed test.

Available since: 1.1.0 Description: Play audio and video streams from the ZEGO RTC server or CDN. Use cases: In real-time or live broadcast scenarios, developers can listen to the [onRoomStreamUpdate] event callback to obtain the new stream information in the room where they are located, and call this interface to pass in streamID for play streams. When to call: After [loginRoom]. Restrictions: None. Caution: 1. The developer can update the player canvas by calling this function again (the streamID must be the same). 2. After the first play stream failure due to network reasons or the play stream is interrupted, the default time for SDK reconnection is 20min. 3. In the case of poor network quality, user play may be interrupted, the SDK will try to reconnect, and the current play status and error information can be obtained by listening to the [onPlayerStateUpdate] event. please refer to https://docs.zegocloud.com/faq/reconnect. 4. Playing the stream ID that does not exist, the SDK continues to try to play after calling this function. After the stream ID is successfully published, the audio and video stream can be actually played. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: The user can see his own local image by calling this function. Use cases: It can be used for local preview in real-time connecting wheat, live broadcast and other scenarios. When to call: After [createEngine]. Restrictions: None. Caution: 1. The preview function does not require you to log in to the room or publish the stream first. But after exiting the room, SDK internally actively stops previewing by default. 2. Local view and preview modes can be updated by calling this function again. The user can only preview on one view. If you call [startPreview] again to pass in a new view, the preview screen will only be displayed in the new view. 3. You can set the mirror mode of the preview by calling the [setVideoMirrorMode] function. The default preview setting is image mirrored. 4. When this function is called, the audio and video engine module inside SDK will start really, and it will start to try to collect audio and video.. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: Users push their local audio and video streams to the ZEGO RTC server or CDN, and other users in the same room can pull the audio and video streams to watch through the streamID or CDN pull stream address. Use cases: It can be used to publish streams in real-time connecting wheat, live broadcast and other scenarios. When to call: After [loginRoom]. Restrictions: None. Caution:

1. Before start to publish the stream, the user can choose to call [setVideoConfig] to set the relevant video parameters, and call [startPreview] to preview the video.
2. Other users in the same room can get the streamID by monitoring the [onRoomStreamUpdate] event callback after the local user publishing stream successfully.
3. In the case of poor network quality, user publish may be interrupted, and the SDK will attempt to reconnect. You can learn about the current state and error information of the stream published by monitoring the [onPublisherStateUpdate] event.
4. To call [SetRoomMode] function to select multiple rooms, the room ID must be specified explicitly.

Available since: 3.1.0 Description: Start screen capture. When to call: After calling the [setVideoSource] function to set the video source to ScreenCapture.

Available since: 3.1.0 Description: Start screen capture. When to call: After calling the [setVideoSource] function to set the video source to ScreenCapture. Restrictions: Only valid for iOS system

Available since: 2.10.0 Description: After starting monitoring, you can receive local audio sound level via [onCapturedSoundLevelUpdate] callback, and receive remote audio sound level via [onRemoteSoundLevelUpdate] callback. Before entering the room, you can call [startPreview] with this function and combine it with [onCapturedSoundLevelUpdate] callback to determine whether the audio device is working properly. Use cases: During the publishing and playing process, determine who is talking on the wheat and do a UI presentation. When to call: After the engine is created [createEngine]. Caution:

1. [onCapturedSoundLevelUpdate] and [onRemoteSoundLevelUpdate] callback notification period is the value set by the parameter.
2. After the sound monitoring is started, even if the local audio capture is not started, [onCapturedSoundLevelUpdate] will have a callback, and the sound level is 0.

Available since: 2.16.0 Description: Disable the Effects beauty environment. Use cases: It is often used in scenes such as video calls and live broadcasts. When to call: Must be called before calling [startPreview], [startPublishingStream]. If you need to modify the configuration, please call [logoutRoom] to log out of the room first, otherwise it will not take effect. Related APIs: [enableEffectsBeauty] switch beauty, [setEffectsBeautyParam] set beauty parameters. Caution: This beauty function is the basic function. If it does not meet the expectations of the developer, you can use the custom video pre-processing function [enableCustomVideoProcessing] or the custom video capture function [enableCustomVideoCapture] docking and constructing the AI ​​vision SDK [ZegoEffects] for best results. Restrictions: This function only supports Android system 5.0 and above, Android SDK version 21 and above. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.2.1 Description: Initiate a request to end the mixing task to the ZEGO RTC server. Use cases: It is often used when multiple video images are required to synthesize a video using mixed streaming, such as education, live broadcast of teacher and student images. When to call: After calling [startMixerTask] to start mixing. Restrictions: None. Caution: If the developer starts the next mixing task without stopping the previous mixing task, the previous mixing task will not automatically stop until the input stream of the previous mixing task does not exist for 90 seconds. Before starting the next mixing task, you should stop the previous mixing task, so that when an anchor has already started the next mixing task to mix with other anchors, the audience is still pulling the output stream of the previous mixing task. Related APIs: You can start mixing by using the [startMixerTask] function.

Available since: 1.20.0 Description: Stop network speed test. Use cases: This function can be used to detect whether the network environment is suitable for pushing/pulling streams with specified bitrates. When to call: It needs to be called after [createEngine]. Restrictions: None. Caution: After the network speed test stopped, [onNetworkSpeedTestQualityUpdate] callback will not be triggered. Related APIs: Call [startNetworkSpeedTest] to start network speed test.

Available since: 1.1.0 Description: Play audio and video streams from the ZEGO RTC server. Use cases: In the real-time scenario, developers can listen to the [onRoomStreamUpdate] event callback to obtain the delete stream information in the room where they are located, and call this interface to pass in streamID for stop play streams. When to call: After [loginRoom]. Restrictions: None. Caution: When stopped, the attributes set for this stream previously, such as [setPlayVolume], [mutePlayStreamAudio], [mutePlayStreamVideo], etc., will be invalid and need to be reset when playing the the stream next time.

Available since: 1.1.0 Description: This function can be called to stop the preview when the preview is not needed locally. Caution: Stopping the preview will not affect the publish stream and playing stream functions. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.1.0 Description: The user stops sending local audio and video streams, and other users in the room will receive a stream deletion notification. Use cases: It can be used to stop publish streams in real-time connecting wheat, live broadcast and other scenarios. When to call: After [startPublishingStream]. Restrictions: None. Caution:

1. After stopping the streaming, other users in the same room can receive the delete notification of the stream by listening to the [onRoomStreamUpdate] callback.
2. If the user has initiated publish flow, this function must be called to stop the publish of the current stream before publishing the new stream (new streamID), otherwise the new stream publish will return a failure.
3. After stopping streaming, the developer should stop the local preview based on whether the business situation requires it.

Available since: 3.1.0 Description: Stop screen capture.

Available since: 1.1.0 Description: After the monitoring is stopped, the callback of the local/remote audio sound level will be stopped. When to call: After the engine is created [createEngine]. Related APIs: Soundwave monitoring can be initiated via [startSoundLevelMonitor].

Available since: 1.15.0 Description: Using this interface allows users to quickly switch from one room to another room. Use cases: if you need to quickly switch to the next room, you can call this function. When to call /Trigger: After successfully login room. Restrictions: None. Caution:

1. When this function is called, all streams currently publishing or playing will stop (but the local preview will not stop).
2. To prevent the app from being impersonated by a malicious user, you can add authentication before logging in to the room, that is, the [token] parameter in the ZegoRoomConfig object passed in by the [config] parameter. This parameter configuration affects the room to be switched over. 3. When the function [setRoomMode] is used to set ZegoRoomMode to ZEGO_ROOM_MODE_MULTI_ROOM, this function is not available. Privacy reminder: Please do not fill in sensitive user information in this interface, including but not limited to mobile phone number, ID number, passport number, real name, etc. Related callbacks: When the user call the [switchRoom] function, the [onRoomStateChanged] (Not supported before 2.18.0, please use [onRoomStateUpdate]) callback will be triggered to notify the developer of the status of the current user connected to the room. Related APIs: Users can use the [logoutRoom] function to log out of the room.

Available since: 1.17.0 Description: Take a screenshot of the specified stream ID. When to call: after called [startPlayingStream]. Restrictions: None. Related callbacks: [onPlayerTakeSnapshotResult] Screenshot data callback. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 1.17.0 Description: Take a snapshot of the publishing stream. When to call: Called this function after calling [startPublishingStream] or [startPreview]. Restrictions: None. Caution: The resolution of the snapshot is the encoding resolution set in [setVideoConfig]. If you need to change it to capture resolution, please call [setCapturePipelineScaleMode] to change the capture pipeline scale mode to [Post]. Related callbacks: The screenshot result will be called back through [ZegoPublisherTakeSnapshotCallback]. Related APIs: [takePlayStreamSnapshot]. Note: This function is only available in ZegoExpressVideo SDK!

Available since: 3.1.0 Description: Update screen capture parameter configuration. When to call: After calling [startScreenCapture] to start capturing. Restrictions: Only valid for iOS system

Available since: 1.1.0 Description: By default, SDK creates and prints log files in the App's default directory. Each log file defaults to a maximum of 5MB. Three log files are written over and over in a circular fashion. When calling this function, SDK will auto package and upload the log files to the ZEGO server. Use cases: Developers can provide a business “feedback” channel in the App. When users feedback problems, they can call this function to upload the local log information of SDK to help locate user problems. When to call: After [createEngine]. Restrictions: If you call this interface repeatedly within 10 minutes, only the last call will take effect. Caution: After calling this interface to upload logs, if you call [destroyEngine] or exit the App too quickly, there may be a failure.It is recommended to wait a few seconds, and then call [destroyEngine] or exit the App after receiving the upload success callback.

Available since: 1.1.0 Description: This function is used to control the use of the front camera or the rear camera (only supported by Android and iOS). Default value: The default is true which means the front camera is used. When to call: After creating the engine [createEngine]. Restrictions: None. Caution: When the custom video capture function [enableCustomVideoCapture] is turned on, since the developer has taken over the video data capture, the SDK is no longer responsible for the video data capture, and this function is no longer valid. Note: This function is only available in ZegoExpressVideo SDK!