Re: [MMUSIC] DECISION: Default mechanism to map RTP data to m- line is based on PT?

On 06/25/2013 01:34 PM, Christer Holmberg wrote:
>
> Hi,
>
> Emil suggested that the default, "MTI", mechanism for mapping RTP data 
> to m- lines should be based on PT. Applications are allowed to use 
> whatever other mechanisms, but usage of such mechanisms must be 
> negotiated (or, applications need to have some other means knowing 
> that the other endpoint support such mechanisms).
>
> *Q3*: Do we need to specify a default, MTI, mechanism for mapping RTP 
> data to m- lines?
>

No. This makes the assumption that all applications have the need to map 
RTP data to m-lines; this assumption is not proven (and probably cannot 
be - it's hard to prove a negative. It might be possible to disprove it, 
though).

> *Q4*: If Q3, do we mandate applications to support, and use (unless 
> applications are made aware of other mechanisms supported by all 
> endpoints) PT for mapping received RTP media?
>

If the WG disagrees with me on Q3, it might as well go down this path. I 
have no strong opinion.

> This means that, when mapping RTP to m- lines is required (whether it 
> is always mandated is discussed in another thread), within a BUNDLE 
> group each PT value must be unique to an individual m- line.
>
> NOTE: If your answer to Q3 is "yes", but your answer to Q4 is "no", 
> please indicate which mechanism you prefer J
>
> Regards,
>
> Christer
>
>
>
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