OPUS redundancy

How to set opus redundancy codec in rtp configuration. My configuration now is
kind : ‘audio’,
mimeType : ‘audio/opus’,
clockRate : 48000,
channels : 2

First of all OPUS has built-in FEC already.

As to RED, I do not think it is supported for audio in all browsers yet.

Here are 2 useful articles:

Looks like SFU support would be necessary for things to work properly in all cases, so that would be when an option might appear in the mediasoup-client.

I read the articles, thank you. You mean RED is not supported by mediasoup.

I’m not a mediasoup maintainer, but my guess would be yes.