[asterisk-dev] Answering SDP video 0 to video 0 Offer (or why Lync cannot get user off on-hold)

[Kinsey Moore]

On 10/15/2012 05:35 AM, Walter Doekes wrote:
> <snip>
>
> Changing this would meet two of my goals:
>
> (1) I'd like to get rid of the WARNING which really isn't worthy
>     of the warning status.
I would not have a problem with this, since this behavior is business as 
usual in this version of chan_sip.
>
> (2) Replying with "m=video 0" will probably make the Lync happy
>     and won't hurt.
>
> I see that there are significant changes in 11&trunk in this area
> that probably already fix it. (r369028 and reviewboard 1988)
>
You are correct, this should be fixed in 11 and trunk.
>
> Does anyone care for a fix for this issue for 1.8 and 10?
>
> (And can I tone down the WARNING to a VERBOSE in all branches?)
>
It should be nearly trivial to backport the initial patch to 10 and 
shouldn't be too bad for 1.8 either.  The reason it has not been done 
already is that is a significant change in behavior and is somewhat 
invasive.

Kinsey Moore