On 7/15/13 1:45 PM, Kumar, Puneet (Puneet) wrote:
> Hi All,
>
> Is it allowed to change the order of media line in SDP in case an UA sends a
> reINVITE?
>
> Consider a case where call is up with audio.
>
> m=audio 38646 RTP/AVP 18
>
> Now can any UA send following in the SDP:
>
> m=image 38648 udptl t38
> ...
> m=audio 38646 RTP/AVP 8 0 97
>
>
> As seen above "image' line is added prior to "audio" line.
Nominally this is not permitted.
BUT, you are permitted to *replace* the first m-line with a new one, and
add another. So technically you could do this without violating anything.
But this would most likely confuse many peers. At best they might
totally reset communication, causing glitches.
Why would you want to do this?
Thanks,
Paul
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