Overview

Update Time：2020-11-13 17:44

Express-Video SDK helps developers quickly build reliable and scalable video calling and interactive live video streaming into mobile, desktop, and web applications for a wide range of use cases such as one-on-one and group video calls, online education, entertainment live video streaming, and others.

With just four simple steps, your applications can access ZEGO's cloud streaming platform to deliver high-quality, ultra-low-latency, and interactive live video to your end-users across all platforms with the support for massive concurrency, providing the users a perfect live video experience.

1 Key Features

Category	Main Function	Function Description	Business Scenario
Basic Functions	Live Push-Pull Streaming	Supports protocols such as RTMP, FLV, HLS, and RTP, global nodes achieve ultra-low 100ms latency, and provide multiple CDN streaming, adaptive flow control and other functions.	Online Education Live Show
	Live broadcast with microphones	Supports multiple anchors linked with microphones, multi-person real-time communication and other functions, which can realize up to 32 channels of linked microphones with live streaming.	PK Lianmai Multi-person Conference
	Beauty	Supports basic beauty functions, including settings for whitening, dermabrasion and other effects.	Show live
Audio and Video Engine	Echo Cancellation	The engine has its own echo cancellation function. In the case of dual talk, the voice of all parties is clear, the duplex experience is good, and it supports three echo cancellation modes: comfortable, moderate and aggressive.	Online Education Live Show
	Noise suppression	The engine has its own noise suppression function. Combined with the psychoacoustic model, it can increase the signal-to-noise ratio by 20dB+ without damaging the voice quality.	Online Education Live Show
	Automatic gain	The engine has its own automatic gain function, which can automatically adjust the microphone volume to adapt to near and far pickup, bringing a good experience in noisy environments.	Online Education Live Show
	Multiple encodings	Support multiple hard coding and multiple soft coding to meet the coding requirements of multiple application scenarios and network environments.	Online Education Live Show
	Multiple decoding	Support multiple hard solutions and multiple soft solutions to meet the decoding requirements of multiple application scenarios and network environments.	Online Education Live Show
	GPU processing	All data goes to GPU memory, with good performance, good stability and low latency.	Online Education Live Show
Network Transmission	Network Transmission Qos	Realize the dynamic balance of redundant data (FEC) and retransmission strategy (ARQ). On the one hand, it can ensure the full utilization of bandwidth, and on the other hand, it will not grab bandwidth and cause congestion of the link itself.	Full scene
	Network Adaptive	Provides end-to-end full-chain optimization algorithms, which can predict network speed according to the current network conditions and automatically perform flow control, and support weak network adaptive streaming and streaming.	Full scene
	Intelligent adjustment	Intelligent adjustment of bit rate and frame rate ensures the balance effect of picture quality and fluency.	Full scene
	Jitter buffer	In a weak network environment, use a good jitter buffer strategy to find the best fit between delay and smoothness.	Full scene

2 Key Properties

Property	Specification
SDK Size	The package size increments of the Express-Video SDK (standard edition) is as follows: iOS (arm64): 4.84 MB Android (arm64): 7.51 MB Android (armv7): 7.22 MB macOS (x86_64): 17.72 MB Windows (x86): 13.61 MB Windows (x86_64): 17.21 MB The package size increments of the Express-Video SDK (including whiteboard function) is as follows: iOS (arm64): 5.48 MB Android (arm64): 8.45 MB Android (armv7): 8.11 MB macOS (x86_64): 19.84 MB Windows (x86): 15.11 MB Windows (x86_64): 19.40 MB
Multi-party Real-time Interaction	Supports up to 32 participants
Video Quality	Video Catpure Resolution: 1080p Video Capture Frame Rate: 1-30 FPS Latency: normally 200ms ~ 1s
Audio Quality	Audio Sampling Rate: 16khz -48khz Number Audio Channels: mono and stereo Echo Cancellation: supports 10 simultaneous speech channels
Network Coverage	Global real-time network with 500 + BGP nodes, covering 200+ countries and territories
Concurrency	Supports up to 1,000,000 concurrent viewers in a single live broadcast

3 Compatibility

ZEGO Express-Video SDK supports iOS, Android, Windows, macOS, and Web, and allows for cross-platform interactions. The table below shows the supported platforms and their versions.

Platform	Supported Version	Supported Architecture
iOS	7.0+	arm64 armv7 x86_64 (Simulator)
Android	4.1+	arm64-v8a armeabi-v7a x86 x86_64
Windows	Windows 7+	x86 x64
Linux	Ubuntu 16.04+ / CentOS	x86_64
macOS	10.10+	x64
Web	Chrome 58+ Firefox 56+ Safari 11+ Opera 45+	-

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Page Directory

1 1 Key Features

2 2 Key Properties

3 3 Compatibility

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