Besides the audio-visual sdk in Rong Yun, which manufacturer recommends it?

Besides the audio-visual sdk in Rong Yun, which manufacturer recommends it?

Real-time communication (RTC for short) refers to the business that can send and receive text, audio and video instantly. With the rapid development in recent years, the functions of real-time communication are increasingly rich, including instant messaging, file sharing, voice call, live interaction, video conferencing and other functions. Demand involves many different industries, including media and entertainment, telecommunications, banking, financial services and insurance (BFSI), public sector and education, retail and consumer goods, transportation and logistics, health care and so on. According to Technavio's analysis report-Global WebRTC Market, 20 17-202 1, it is estimated that the market value of 202 1 will reach 37.3 billion US dollars, and the compound annual growth rate (CAGR) will be from 20 17 to 202/kloc-0.

With more and more extensive applications in the industry, many real-time communication platforms have emerged, including Tencent, Sound Network, Wild Dog Cloud, Instant Structure, Netease Yun Xin, Huanxin, Rong Yun, Bright Eye Cloud, Tianyi RTC and so on. With the gathering of technology giants, traditional industry manufacturers and Internet companies, how should SMEs and startups choose RTC services in the market? Bian Xiao selected several real-time communication SDKs such as Sound Network, Wild Dog Cloud, Instant Structure, Bright Eye Cloud and Tianyi RTC from the dimensions of cross-platform adaptation, audio and video coding and decoding, enhanced auxiliary functions and interactive live broadcast, and downloaded and installed the client applications of these five manufacturers for comparative analysis.

Evaluation angle 1. Cross-platform adaptation:

With the development of Internet application terminals, an excellent real-time communication product must support various terminal application platforms, including web pages, Windows and MAC operating systems, and mobile phones (Android, iOS). Among them, Sound Network, Wild Dog Cloud and Tianyi RTC need to register their developers, open APP_ID and compile the application demonstration software of the corresponding terminal, that is, structured and bright eye cloud can directly download the compiled demonstration.

For Windows and MAC systems, the "Unsupported" item in the table indicates that the platform does not provide an application client for this system alone, but it can support it through the Web. In addition, the SDK development package of Sound Network and Bright Eye Cloud is a NativeSDK optimized on the basis of the original WebRTC.

Evaluation angle 2. Audio and video coding:

One of the key problems of real-time communication is the optimization of audio and video codec, including the optimization of video soft and hard solution algorithm and general video 264 codec algorithm. Audio processing includes noise elimination, echo suppression, automatic gain and so on. In view of the complex Internet environment, adaptive code rate is generally used for real-time optimization.

Note:/refers to the lack of relevant instructions in the developer's manual. Video hard decoding refers to the use of hardware decoding functions provided by PC or mobile phone system, such as Intel hardware acceleration on PC, VideoToolBox on iOS, MediaCodec on Android, etc.

SD/HD /UHD video communication is the standard configuration of mainstream calls and live broadcasts. The demo test runs on the existing Win10/MAC OS10.12/iPhone/Android 6.0 mobile phone.

Through the test, most mainstream high-definition video smooth calls on the RTC platform of the Internet are configured with the resolution of 640x480 15fps. When the resolution is above 720P, the picture is delayed, lost and stuck.

Because each bottom core adopts WebRTC, there is not much difference in Internet standard definition communication under the condition of sufficient bandwidth and strong terminal performance. The difference lies in the measures taken when the network environment is poor, including adaptive coding and transmission optimization. Among them, the acoustic network provides exclusive patented codec and network optimization functions, while the bright cloud provides unique inter-network interconnection and NAT penetration algorithms, that is, it has the function of weak network transmission optimization. Tianyi RTC development manual did not find the interface for optimizing parameters.

Evaluation angle 3. Enhancements:

The auxiliary enhancement function of video call process is also an important reference item for choosing RTC SDK. The current support for each product is as follows:

In the actual testing process of Demo, instant build provides many beauty and filter functions, while others use the third-party beauty or filter SDK.

Evaluation angle 4. Interactive live broadcast:

At present, mainstream live broadcast platforms, education, telemedicine and other industries are using live broadcast //CDN acceleration and other application technologies. Sound network, instant structure and bright eye cloud SDK all provide various live interactive functions. Sound Network, Wild Dog Cloud and Instant Structure provide separate live SDK packages, while Bright Eye Cloud and Tianyi RTC integrate video call, video conference and live broadcast into one SDK.

The actual measurement shows that the unicast mode of online 320x240 is smooth and clear, and multiple anchors are stuck or delayed in continuous wheat mode. It is recommended to purchase CDN live broadcast acceleration service in interactive live broadcast mode of standard definition or high definition or continuous wheat mode.