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

Re: Fwd: video size when aspect ratio is not 1

From: Philip Jägenstedt <philipj@opera.com>
Date: Sun, 23 Aug 2009 12:43:25 +0200
To: "Conrad Parker" <conrad@metadecks.org>
Cc: "Silvia Pfeiffer" <silviapfeiffer1@gmail.com>, \"Raphaël Troncy <Raphael.Troncy@cwi.nl>, " \"Media <Fragment" <public-media-fragment@w3.org>
Message-ID: <op.uy32qnv3sr6mfa@worf>
On Sun, 23 Aug 2009 03:56:36 +0200, Conrad Parker <conrad@metadecks.org>  

> 2009/8/23 Philip Jägenstedt <philipj@opera.com>:
>> On Sat, 22 Aug 2009 16:54:02 +0200, Silvia Pfeiffer
>> <silviapfeiffer1@gmail.com> wrote:
>>> 2009/8/22 Raphaël Troncy <Raphael.Troncy@cwi.nl>:
>>>>> just came across this on whatwg. I think it also applies to our  
>>>>> aspect
>>>>> fragment addressing, right?
>>>> Indeed. The aspect ratio is defined in our document as a way to crop  
>>>> an
>>>> image to a centered area given the defined aspect ratio. We then  
>>>> write:
>>>> "The original media is cropped either horizontally or vertically to  
>>>> the
>>>> maximum size that has the given aspect ratio."
>>>> I realize that we have no use case that clearly shows the need for  
>>>> such a
>>>> feature. Perhaps we could add one, what do you think?
>>> Yes, I do think we need a use case for aspect - when I re-read this
>>> part recently, I found it a strange MF addressing type. If you have an
>>> idea, please share / add.
>> I think the only use case if fixing files which are incorrectly encoded  
>> or
>> for file formats that simply can't contain aspect ratio information.  
>> This
>> was actually in HTML5 before but was dropped because it wasn't seen as  
>> very
>> important.
> That sounds like adding information which isn't present in the
> resource for some reason. It doesn't seem like it has anything to do
> with accessing or addressing the resource.
> Also it sounds like the use case is to give a hint to a custom HTML5
> video application, which then uses javascript to render to the correct
> aspect. Surely that custom hint could just as easily be given in a
> different <video> attribute or within the page javascript or
> something?

Yep, I have no objections to MF not having an aspect ratio syntax.

Philip Jägenstedt
Opera Software
Received on Sunday, 23 August 2009 10:43:48 UTC

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