SVC相關介紹

https://www.cnblogs.com/huxiaopeng/p/5653310.html

https://janus.conf.meetecho.com/vp9svctest.html

https://w3c.github.io/webrtc-svc/#intro

開源框架Janus https://blog.csdn.net/sonysuqin/article/details/84988120