WebRTC: Learn something from Mediasoup.

[winlinvip]

Ideas

Lianxiang:

• BWE and other congestion control algorithms.
• SVC, Simulcast.
• Multi-Track support, which may conflict with RTMP to some extent.
• Status callback, such as WebRTC's getStats interface.

Li Chao:

• Congestion control algorithms: BWE, flow control, bandwidth estimation, etc., can be moved from WebRTC.
• Protocol support, feedback protocols, etc.
• The author follows up on WebRTC very quickly and has a deep understanding, which is worth learning from.

B Shen, Zhihong:

• Congestion control can use this: razor

razor author is Yuan Rongxi, a technical expert with solid skills in both database and audio/video fields.

Li Xin:

• MediaSoup supports direct TCP streaming, without TURN, refer to WebRTC: WebRTC over TCP directly, not TURN, TCP transmission (non-TURN) #2852.

[winlinvip]

Simulcast branch: https://github.com/ossrs/srs-simulcast Maintainer is @johzzy

[winlinvip]

Support for WebRTC client bandwidth statistics: 4fe90d4

[winlinvip]

A new branch feature/simulcast has been added, linking to the independent repository srs-simulcast.

Since the WebRTC basic capabilities of SRS are still lacking, such as incomplete statistics (Prometheus Exporter support is needed), almost no congestion algorithms (need to be ported from WebRTC), and the statistics page has not been added yet (similar to chrome://webrtc-internals but we will implement it with Grafana), it may be more appropriate to support advanced features like Simulcast after these basics are improved.

[phxgbl]

@winlinvip any plan to implement SVC support in SRS SFU?