W3C home > Mailing lists > Public > public-media-fragment@w3.org > September 2009

RE: NinSuna status update

From: Davy Van Deursen <davy.vandeursen@ugent.be>
Date: Tue, 29 Sep 2009 09:31:29 +0200
To: "'Silvia Pfeiffer'" <silviapfeiffer1@gmail.com>
Cc: <public-media-fragment@w3.org>
Message-ID: <001201ca40d6$dc8cbb70$95a63250$@vandeursen@ugent.be>
Hi Silvia,

> -----Original Message-----
> From: public-media-fragment-request@w3.org [mailto:public-media-
> fragment-request@w3.org] On Behalf Of Silvia Pfeiffer
> Sent: dinsdag 29 september 2009 1:20
> To: Davy Van Deursen
> Cc: public-media-fragment@w3.org
> Subject: Re: NinSuna status update
> Hi Davy,
> that looks awesome.
> Do you have a test Web page for these things? If not, I will update
> the integrated html5 demo page that I wrote recently.
No, there is no test Web page yet. For the moment, I just provided some
working example URLs on the Wiki page.

> BTW: Does your client also support he #-based media fragment
> addressing?
For the moment, we don't have a client :-). Hence, retrieval of #-based
media fragment addressed media is not possible yet. However, you can test
its behavior by sending a Range HTTP request header to our server (e.g., by
using the Firefox Modify headers add-on [1]). The response (including the
Content-Range HTTP response header) can then for example be visualized using
the Firefox Live HTTP headers add-on [2]. But it would indeed be nice to
have a client that does this behind the scenes.

> Another question: when you do the ingest, do you create a special
> index on the server that supports the retrieval of these byte ranges
> or do you re-use the existing index in MP4? In Ogg we have recently
> been discussing a new format for keeping an index of the temporal
> structure of the Ogg file inside Ogg - possibly in the skeleton
> header. I just wondered whether you think that would be useful or
> whether you would always create a separate index file anyway.

We always create our own index. The format of this index is independent of
any container format. Thus, the same index structure is used for MP4, Ogg,
etc. The ingester is dependent of the incoming media formats and tries to
use as many information as possible from the headers provided by the
incoming media format. Therefore, providing an index of the temporal
structure within an Ogg file would certainly make the job of our Ogg
inserter a lot easier ;-). 

Best regards,


[1] https://addons.mozilla.org/en-US/firefox/addon/967 
[2] https://addons.mozilla.org/en-US/firefox/addon/3829 
Received on Tuesday, 29 September 2009 07:32:19 UTC

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