Re: [MMUSIC] [AVTCORE] New Possible Errata in RFC2326 (And Draft) regarding Blocksize

On 2015-01-30 04:22, Julius Friedman wrote:
> Hence my argument about being supported by the underlying transport
> session.
> 
> But just to be clear,   a client may request a blocksize of 1 and the
> server would:
> 
> 1) either be able to oblige and deliver a 13 byte packet at minimum
> 
> OR
> 
> 2) respond with a blocksize of x where x is the lowest available closest
> multiple supported.
> 
> There is no corner case.
> 
> I would also expect as a result that the transport level framing is not
> included in this count either?  E.g. 4 for binary interleaved transport.

Yes, with the definition that exist this is focused on the media part
that will be excluded.

> 
> Thanks for clarifying this.
> 
> The problem is then with the binary interleaved section and I will wait
> for further feedback in that regard.
> 
> Thanks again,
> 
> -Julius
> 
> On Jan 29, 2015 10:10 PM, "Dale R. Worley" <worley@ariadne.com
> <mailto:worley@ariadne.com>> wrote:
> 
>     Julius Friedman <juliusfriedman@gmail.com
>     <mailto:juliusfriedman@gmail.com>> writes:
>     > ", it seems
>     > to me that it counts only the bytes after the "RTP Fixed Header
>     Fields"
>     > and any RTP header extensions, and that number legitimately could be
>     > small (depending on the media encoding in the RTP).
>     > "
>     >
>     > - There must be 12 octets which are the fixed header, this is
>     where that
>     > information comes from.
> 
>     That's incorrect.  See the text you quoted earlier:
> 
>        12.7 Blocksize
> 
>        This request header field is sent from the client to the media server
>        asking the server for a particular media packet size. This packet
>        size does not include lower-layer headers such as IP, UDP, or
>        RTP. [...]
> 
>     Note that it says "This packet size does not include ... headers such as
>     ... RTP."  The RTP header is *not* counted in this blocksize, so its 12
>     octets do not constitute a minimum allowed value of blocksize
> 
>     Dale
> 
> 
> 
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-- 

Magnus Westerlund

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