WebRTC: Support WebRTC, for video meeting, SFU server, video converence.

[winlinvip]

WebRTC is now quite mature, with stable playback and the protocol already being an RFC. There are also quite a few corresponding open-source projects. However, I believe that WebRTC still lacks a high-performance, simple and easy-to-use server. I have analyzed the existing servers before and found various issues. SRS has a great opportunity to solve these problems.

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[Jianru-Lin]

Looking forward very much

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[PengZheng]

Has the WebRTC feature started? How is the progress going? I am very interested in this area.

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[823639792]

If you support it, then it's awesome.

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[winlinvip]

FLV CodecID defined Opus in e77b570

[winlinvip]

Thank you @xiaozhihong for submitting the PR that supports WebRTC. Currently, it supports RTMP streaming and WebRTC playback, and more features will be continuously improved: #1638

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[winlinvip]

candidate is the address that RTC provides services to the outside. In certain deployment scenarios, we need to configure it in multiple ways.

This is also the only item that RTC must confirm the configuration for, while others can be left at their default settings.

For detailed configuration instructions, please refer to: https://github.com/ossrs/srs/wiki/v4_CN_WebRTC#config-candidate

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