Re: [rtcweb] Mute implementations (Re: More Comments on draft-ietf-rtcweb-use-cases-and-requirements-07)

[Randell Jesup <[e-mail]>]

On 6/15/2012 4:49 PM, Martin Thomson wrote:
> On 15 June 2012 13:42, Randell Jesup<[e-mail]>  wrote:
>> I would also suggest that for video-mute that instead of stopping video or
>> sending black, the application should send a "mute image".
>
> The question I have is whether there is: a) a fixed image/video that
> is serialized to RTP b) video "comfort noise", or c) local mute
> image/video playback.  If it can't be c, then you might need to
> explain yourself.

Either we build it into the system (which I dislike - SetMuteImage() or 
whathaveyou, though we could), or we put it in the application domain 
and suggest or assist implementation.

The simple way to handle Mute is to revector the input to a "mute" or 
"hold" source, and they may not be the same (hold would have "Please 
Hold" and music, perhaps; mute would have silence and "Muted" or a 
camera with a circle/slash, etc).  You can also signal that out of band 
to let the other end take smart action (remove muted video image, 
display "muted" next to a name, etc).  This can be done via 
DataChannels, for example.  You may then reinvite for Hold to make it 
one-way, but that's mostly optional.

-- 
Randell Jesup
[e-mail]