Re: minutes of 2012-01-04 teleconference

On 4/01/2012 12:15, Raphaël Troncy wrote:
> Dear all,
>
> For the record, the minutes of today's phone telecon is at
> http://www.w3.org/2012/01/04-mediafrag-minutes.html (and in text format
> below).
[[SNIP]]
> Raphael: Should we clarify what are the setup data we send?
> ... see message from Pierre Yves,
> [16]http://lists.w3.org/Archives/Public/public-media-fragment/2011De
> c/0023.html
> ... so in the recipes, by "codec setup data", do we meant codecs
> setup data _and_ the time/space index tables (e.g.
> stts/ctts/stsc/stsz/stco/stss atoms, in ISO 14496-10)?
>
> [16]
> http://lists.w3.org/Archives/Public/public-media-fragment/2011Dec/0023.html
>
> Erik: I can ask Davy for clarifications in his implementations

As Pierre-Yves correctly indicates in the mail mentioned above, the term 
'codec setup data' is not well defined in our spec I think. In 
particular, 'codec setup data' from a media fragments point of view 
consists of
- setup data for the decoder (such as resolution, quantification 
parameter, ...);
- timing information (i.e., when to display a certain frame);
- track information (i.e., which tracks are present and how does the raw 
samples relate to these tracks).

Note that this is independent of the MP4 container format (e.g., a WebM 
file also contains these three kinds of information).

Should we find another term or should we just clarify this in the text 
(e.g., by means of a definition for 'codec setup data')?

Best regards,

Davy

-- 
Davy Van Deursen

Ghent University - IBBT
Department of Electronics and Information Systems - Multimedia Lab
URL: http://multimedialab.elis.ugent.be/dvdeurse

Received on Thursday, 5 January 2012 12:29:37 UTC