Introduction

Thunderbolt SDK for real-time video interaction (Jocloud-Video-Interaction) provides services of real-time video call and distribution of interactive live streaming.

Based on in-depth research in network and audio/video technologies, Jocloud provides seamless, multi-platform compatible, low-latency, and high-currency real-time audio/video call across the globe through self-developed real-time network (RTN) and audio/video engines. It aims to facilitate developers to quickly implement one-to-one, one-to-many, or many-to-many audio/video live streaming, live distribution, etc., thereby meeting scenario-specific needs of industries such as social media, live streaming, education and collaboration.

Product Architecture

Application Scenario

According to certain scenarios of different services, Thunder SDK provides two basic technological functions.

CategoryFunctionApplication Scenario
Real-Time Video CallOne-to-one or many-to-many video callOne-to-one or many-to-many video chat, video chatroom, video meeting, small or large class teaching, etc.
Interactive Live BroadcastingSingle-person video publishing or group video interaction, and sharing to CDN is availableAnchor-audience co-hosting and anchor face-offs in live show, large open classes, etc.

Main Features

According to main technological scenarios, Thunder SDK provides abundant sets of function APIs for developers to combine flexibly.

Basic Features

CategoryFeatureDescriptionApplication Scenario
Co-HostingCo-hosting on clientLow-latency interaction between clients in a roomAll scenarios
Co-HostingCo-hosting across roomsLow-latency interaction between clients across roomsAnchor face-offs across rooms in live show
AudioHi-Fi audio qualityHigh audio quality and 2-channel stereo with audios sampled at 48 kHzHigh-quality voice radio, karaoke, music teaching, etc.
Audio3A processingAcoustic Echo Chancellor (AEC), Automatic Noise Suppression (ANS) and Automatic Gain Control (AGC), ensuring audio quality in scenarios such as dual-talk and noise reductionAll scenarios
AudioAudio mixingSend and play the local or online audio files and user voice simultaneously to other users in the roomLive show, voice chatroom, matchmaking video chat, karaok, voice radio, small or large class teaching, etc.
AudioVoice change & reverb14 voice change effects, such as coquettish girl, heavy metal
10 reverberation effects, such as karaoke, recording studio and concert
Live show, voice chatroom, matchmaking video chat, karaoke, voice radio, etc.
AudioVolume promptProvide volume prompt for local and remote users in forms of waveform or loudspeaker volume promptLive show, voice chatroom, matchmaking video chat, karaoke, voice radio, etc.
AudioVoice positioningSet the voice position of a remote user to track the real-time position of the remote user, creating a real sense of space.Online games
AudioRaw audio dataCustomize raw audio data collected by SDK. For example, in the preprocessing stage, optimize raw audio data before submitting it to SDK for encoding and transmission.Users have their audio/video libraries and audio data modification is needed (for example, voice change)
VideoHD image quality720P and 1080P HD image qualityAll video scenarios
VideoScreen sharingDisplay the video content to other users in the room synchronously. Users can specify the screens, program windows and areas for sharing.Game live streaming, large or small class teaching, one-to-one teaching, kid programming, video meeting, etc.
VideoRaw video dataCustomize raw video data collected by SDK. For example, in the preprocessing stage, optimize raw video data before submitting it to SDK for encoding and transmission.Video call, video chatroom, interactive live streaming, etc. Users can use beautifying tools and stickers.
Live StreamingAudio layoutMix audio/video streams of multiple channels in a room into one streamInteractive live streaming
Live StreamingStream pushing to CDNPush audio/video streams in a room to other RTMP servers and distribute them by CDN (distribution should be supported by the third-party)Social sharing in interactive live streaming
Co-HostingSEIWhile transmitting audio/video stream data, synchronize custom information to the media stream via SEI/DSE frames, such as layout, lyric and volume notificationsTo synchronize custom information, server's layout or volume prompt information

Extended Features

CategoryFeatureDescriptionApplication Scenario
Extended FeaturesCloud recordingRecord audio/video contents at server and save them to a third party in a write modeOnline education, social entertainment, financial customer service, etc.
Extended FeaturesSignalsReliable transmission channel for instant messaging and status synchronizationAll scenarios
Extended FeaturesAudio moderationSecurity check for audio contents like pornographic, sensitive political informationService compliance check
Co-hostingVideo moderationSecurity check for video contents like pornographic, sensitive political informationService compliance check

Product Advantages

Thunderbolt SDK is in the vanguard of quality in the industry.

AdvantageDescription
Full Coverage & High ConcurrencyWith RTN designed for two-way real-time transmission, it provides audio/video real-time network system worldwide of high quality via in-house IDC room and public cloud; based on intelligent routing algorithm and optimal end-to-end transmission path, it provides the best service experience for users and supports millions of concurrent connections.
Full Platforms & Multiple TerminalsWith industry-leading compatibility, it provides SDK APIs covering iOS, Android, Windows and macOS; supports interconnection with WebRTC and WeChat Mini Programs; and adapts over 5,000 models, with excellent power consumption and audio/video quality for low-end models.
High Quality & Low LatencyIndustry-leading in-house audio/video engine in audio, video and network algorithm; average end-to-end latency ranges from 200 ms to 500 ms; supports 48 kHz audio and 720P and 1080P video, providing normal audio/video services when the packet loss rate is 70% and 60% respectively; excellent 3A processing to reduce echoes, howling and background noise.
Multiple Scenarios & Easy CombinationSDK and API cover the capturing, preprocessing, encoding, transmission, decoding, post-processing, rendering and playing; and can suffice for different industries by abundant API classes and complete event callbacks.
Low Cost & Easy AccessWith comprehensive API and access manuals, it only takes 30 minutes to implement interaction capabilities with low-delay and cost-effective.

Key Properties

Thunderbolt SDK provides stable and reliable audio/video performance and enables real-time audio/video interaction under all basic network circumstances.

PropertySpecification
SDK Package Size8-10 MB
Video Interaction CapacityUp to 9 participants
Audio Interaction CapacityUnlimited
Audience Capacity1 million
Network CoverageGlobal
Video QualityResolution: 1080p
Frame rate: 30 fps
Sound/image alignment: –100 - +25 ms
Audio QualitySampling rate: 16-48 KHz
Number of channels: mono and stereo
Audio & Video Latency70 ms
Uplink/Downlink Anti-Packet Loss RateAudio: 70%
Video: 60%

Platform Compatibility

Thunderbolt SDK supports a wide range of platforms and allows for cross-platform connections. The following is a list of supported platforms, their versions and architectures.

PlatformSupported VersionSupported Architecture
iOS8.0+armv7, arm64, x86
Android4.0.3+armeabi-v7a, arm64-v8a, x86, x86_64, and simulator (x86)
Windows7.0+x86
macOS10.12+x86_64
WebGoogle Chrome browser 72+, browsers based on Chrome 72+/
WeChat Mini ProgramSupported/
ElectronSupported/

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