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Re: [video-codec] Storage format (Re: Proposed charter)

"Ali C. Begen (abegen)" <abegen@cisco.com> Mon, 05 November 2012 18:04 UTC

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From: "Ali C. Begen (abegen)" <abegen@cisco.com>
To: Ralph Giles <giles@mozilla.com>
Thread-Topic: [video-codec] Storage format (Re: Proposed charter)
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Date: Mon, 05 Nov 2012 18:04:50 +0000
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Cc: Harald Alvestrand <harald@alvestrand.no>, "video-codec@ietf.org" <video-codec@ietf.org>
Subject: Re: [video-codec] Storage format (Re: Proposed charter)
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-----Original Message-----
From: Ralph Giles <giles@mozilla.com>
Date: Monday, November 5, 2012 1:46 PM
To: "Ali C. Begen" <abegen@cisco.com>
Cc: "harald@alvestrand.no" <harald@alvestrand.no>, "video-codec@ietf.org"
<video-codec@ietf.org>
Subject: Re: [video-codec] Storage format (Re:  Proposed charter)

>On 12-11-05 7:55 AM, Ali C. Begen (abegen) wrote:
>
>> If you want http streaming support, rather than a simple progressive
>> download session, it has to be chunked anyway. Maybe the charter should
>> actually clarify whether we need just progressive download support or a
>> bit more advanced streaming support.
>
>Can you elaborate on the requirement you're proposing here? HTTP

I am not proposing any requirement. Just thought it would be nice for the
charter to clarify this bullet. If you want simple progressive download,
you just need a file format like a container that can use with the new
codec. But, if you want a streaming functionality with trick modes, etc.,
the format has to support chunkability somehow.

The file that holds the content on the server could be one huge file or
several smaller files where each file holds one or more chunks. Dash
really does not care about that. IOW, chunking does not have to be
physical chunking. It could be all "virtual".

>streaming, in the sense that media can be encoded and sent out in a
>single pass, works fine with WebM and Ogg containers.

Sure.

>
>I've heard chunking into discrete files is necessary for some CDN-based
>delivery schemes, because the CDN won't pipeline file delivery. Is that

Correct. 

>what you're referring to?

Nope. I hope what I meant is clear now from above.

-acbeen

>
> -r
>

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