> Which codecs can be within those tracks is not mandated by the WebRTC specification. However, RFC 7742 specifies that all WebRTC-compatible browsers must supp

> Which codecs can be within those tracks is not mandated by the WebRTC specification. However, RFC 7742 specifies that all WebRTC-compatible browsers must support VP8 and H.264's Constrained Baseline profile for video, and RFC 7874 specifies that browsers must support at least the Opus codec as well as G.711's PCMA and PCMU formats. https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/WebRTC_codecs https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Fo...