Re: Mangling a=extmap and a=mid before setLocalDescription

On 7/19/17 13:58, Iñaki Baz Castillo wrote:
> I know that the idea is to not have to mangle the SDP to get some cool
> things, but before that happens in the real world, is it allowed to
> mangle the ID of a=extmap and the value of a=mid between createOffer()
> and setLocalDescription()?
>
> Are current browsers supposed to honor those new values given in
> setLocalDescription() and use them within the RTP packets?


JSEP makes this illegal; see 
https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-21#section-5.4

I'm sure Firefox won't honor such changes. I suspect Chrome doesn't; 
and, if it does, it shouldn't.

/a