Product Overview

Last updated 2022/04/11 02:24:37

Agora SDK v4.0.0 is a new SDK that you use to embed real-time video and audio into your app. It supports large-scale real-time interactive activities, and provides better real-time interactive effects.

With the top extension vendors entering the Agora Extensions Marketplace, Agora has built an extension ecosystem based on this new SDK that allows developers to integrate extension services seamlessly.

Using Video SDK v4.0.0 you can now publish multiple external audio and video streams to any channel. This includes multi-camera capture, multi-channel screen capture and self-rendering. You can also push built-in players that support multi-channel video stream channel management to the network.

Benefits and features

This section describes the benefits and key features of the Agora SDK v4.0.0.

Extensions from the Agora extensions marketplace

In order to enhance the real-time audio and video interactive activities based on the Agora SDK, this release supports the one-stop solution for the extensions from the Agora extensions marketplace:

Easy to integrate: The integration of modular functions can be achieved simply by calling an API, and the integration efficiency is improved by nearly 95%.
Extensibility design: The modular and extensible SDK design style endows the Agora SDK with good extensibility, which enables developers to quickly build real-time interactive apps based on the Agora extensions marketplace ecosystem.
Build an ecosystem: A community of real-time audio and video apps has developed that can accommodate a wide range of developers, offering a variety of extension combinations. After integrating the extensions, developers can build richer real-time interactive functions. For details, see Use an Extension.
Become a vendor: Vendors can integrate their products with Agora SDK in the form of extensions, display and publish them in the Agora extensions marketplace, and build a real-time interactive ecosystem for developers together with Agora. For details on how to develop and publish extensions, see Become a Vendor.

Multi-media tracks

Publish multiple media tracks to one or multiple channels at the same time.
Support multiple external audio and video capture sources, including multi-channel cameras, multi-channel screen capture, multi-channel microphones, and multi-channel self-rendering.

Built-in media player

Package size is reduced.
API is easier to use and integration time is reduced.
Unified audio and video management, higher stability.
Player can be published to the network.

Channel media options

Add channel media options to simplify the publish/subscribe operation.

Functions and scenarios

Agora SDK v4.0.0 boasts a flexible combination of functions for different scenarios.

Function	Description	Scenario
Co-hosting in a channel	An audience switches to a co-host and interacts with the existing host.	Large-scale live streams where hosts can invite the audience to interact with them. Online games such as Murder Mystery and Werewolf Killing.
Co-hosting across channels	Hosts interact with each other across channels.	PK Hosting.
Audio mixing	Sends the local and online audio with the user's voice to other audience members in the channel.	Online KTV. Interactive music classes for children.
Screen sharing	Hosts share their screens with the audience in the channel. Supports specifying which screen or which window to share, and supports specifying the sharing region.	Interactive online classes. Live streaming of gaming hosts.
Basic image enhancement	Sets basic beauty effects, including skin smoothening, whitening, and cheek blushing.	Image enhancement in a video call.
Modify the raw data	Developers obtain and modify the raw voice or video data of the SDK engine to create special effects, such as a voice change.	To change the voice in an online voice chatroom. Image enhancement in a live stream.
Customize the video source and renderer	Users process videos (from self-built cameras, screen sharing, or files) for image enhancement and filtering.	To use a customized image enhancement library or pre-processing library. To customize the application's built-in image and video modules. To use other video sources, such as a recorded video. To provide flexible device management for exclusive video capture devices to avoid conflicts with other services.
Push streams to the CDN	Sends the audio and video of your channel to other RTMP servers through the CDN: Starts or stops publishing at any time. Adds or removes an address while continuously publishing the stream. Adjusts the picture-in-picture layout.	To send a live stream to WeChat or Weibo. To allow more people to watch the live stream when the number of audience members in the channel reached the limit.

Key properties

Property	Agora specifications
SDK package size	4.61 MB to 13.94 MB
Host capacity	17 users
Latency on the audience's client	400 ms to 800 ms
Audience capacity	One million users
Video profile	SDK video source: Up to 1080p @ 60fps. Custom video source: Up to 4K
Audio profile	Sample rate: 16 kHz to 48 kHz. Support for mono and stereo sound
Audio anti-packet-loss rate	80% (uplink and downlink)
Latency between the host and the co-host	≤ 400 ms

Compatibility

Agora SDK v4.0.0 is supported on platforms such as iOS, Android, Windows, and macOS. The following is a list of supported platforms and their versions.

Platform	Supported Version
Android	4.1+ The Android SDK supports the following ABIs: armeabi-v7a arm64-v8a x86 x86-64
iOS	9.0+
macOS	10.10+ The macOS SDK supports the following architecture: x86-64 arm64
Windows	Windows 7+ The Windows SDK supports the following architecture: x86 x86-64

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