1、引言

著名的实时音视频开源工程WebRTC已经十周年了。基于WebRTC的各种音视频产品和应用数不胜数，没有WebRTC，实时音视频技术不会发展的这么快。

十年前，谷歌两次收购On2 Technologies和Global IP Solutions （早期的QQ中也使用了它的音视频技术），并由此引导出了两个开源项目：WebM项目——一系列先进的视频压缩技术（编解码器），以及用于实时语音视频通信的WebRTC。 

近日，Chromium开源工程官方博客中更新了关于庆祝WebRTC开源技术十周年的博文。以下是原文。

2、Celebrating 10 years of WebM and WebRTC

Ten years ago, Google planted the seeds for two foundational web media technologies, hoping they would provide the roots for a more vibrant internet. Two acquisitions, On2 Technologiesand Global IP Solutions, led to a pair of open source projects: the WebM Project, a family of cutting edge video compression technologies (codecs) offered by Google royalty-free, and the WebRTC Project building APIs for real-time voice and video communication on the web. 

These initiatives were major technical endeavors, essential infrastructure for enabling the promise of HTML5 with support for video conferencing and streaming. But this was also a philosophical evolution for media as Product Manager Mike Jazayeri noted in his blog post hailing the launch of the WebM Project: 

“A key factor in the web’s success is that its core technologies such as HTML, HTTP, TCP/IP, etc. are open and freely implementable.”

As emerging first-class participants in the web experience, media and communication components also had to be free and open. 

A decade later, these principles have ensured compression and communication technologies capable of keeping pace with a web ecosystem characterized by exponential growth of media consumption, devices, and demand. Starting from VP8 in 2010, the WebM Project has delivered up to 50% video bitrate savings with VP9 in 2013 and an additional 30% with AV1 in 2018—with adoption by YouTube, Facebook, Netflix, Twitch, and more. Equally importantly, the WebM team co-founded the Alliance for Open Media which has brought the IP of over 40 major tech companies in support of open and free codecs. With Chrome, Edge, Firefox and Safari supporting WebRTC, more than 85% of all installed browsers globally have become a client for real-time communications on the Internet. WebRTC has become a stable standard and it is now the default solution for video calling on the Web. These technologies have succeeded together, as today over 90% of encoded WebRTC video in Chrome uses VP8 or VP9. 

The need for these technologies has been highlighted by COVID-19, as people across the globe have found new ways to work, educate, and connect with loved ones via video chat. The compression of open codecs has been essential to keeping services running on limited bandwidth, with over a billion hours of VP9 and AV1 content viewed every day. WebRTC has allowed for an ecosystem of interoperable communications apps to flourish: since the beginning of March 2020, we have seen in Chrome a 13X increase in received video streams via WebRTC.

These successes would not have been possible without all the supporters that make an open source community. Thank you to all the code contributors, testers, bug filers, and corporate partners who helped make this ecosystem a reality. A decade in, Google remains as committed as ever to open media on the web. We look forward to continuing that work with all of you in the next decade and beyond.

（以上原文链接：https://blog.chromium.org/2020/05/celebrating-10-years-of-webm-and-webrtc.html）

3、52im社区有关WebRTC的文章和资源

《开源实时音视频技术WebRTC的现状》
《简述开源实时音视频技术WebRTC的优缺点》
《访谈WebRTC标准之父：WebRTC的过去、现在和未来》
《良心分享：WebRTC 零基础开发者教程（中文）[附件下载]》
《WebRTC实时音视频技术的整体架构介绍》
《新手入门：到底什么是WebRTC服务器，以及它是如何联接通话的？》
《WebRTC实时音视频技术基础：基本架构和协议栈》
《浅谈开发实时视频直播平台的技术要点》
《[观点] WebRTC应该选择H.264视频编码的四大理由》
《基于开源WebRTC开发实时音视频靠谱吗？第3方SDK有哪些？》

《开源实时音视频技术WebRTC中RTP/RTCP数据传输协议的应用》

《简述实时音视频聊天中端到端加密（E2EE）的工作原理》

《实时通信RTC技术栈之：视频编解码》

《开源实时音视频技术WebRTC在Windows下的简明编译教程》

《网页端实时音视频技术WebRTC：看起来很美，但离生产应用还有多少坑要填？》

《了不起的WebRTC：生态日趋完善，或将实时音视频技术白菜化》

《腾讯技术分享：微信小程序音视频与WebRTC互通的技术思路和实践》

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