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

Re: Media Fragment URI Syntax: 3 polls now open

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Wed, 28 Jan 2009 10:34:33 +1100
Message-ID: <2c0e02830901271534o1d13fda1l4341fddac5c3f9ca@mail.gmail.com>
To: RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Cc: Dave Singer <singer@apple.com>, Media Fragment <public-media-fragment@w3.org>

On Wed, Jan 28, 2009 at 9:57 AM, RaphaŽl Troncy <Raphael.Troncy@cwi.nl> wrote:
> Hi Silvia,
>
>> Firstly I have another feedback on the TRBL specification: in CSS you
>> can specify negative numbers to go outside the given area. So, the
>> "Pro" on "not possible to crop outside the media" is not quite
>> correct.
>
> Yes it is correct because we consider only positive int, (0,0) is top-left
> of the image. We might want to add another case where we allow negative int
> too, but we have excluded this possibility in Ghent as far as I remember,
> unfortunately, no trace :-( I'm happy to open the discussion.
>
>> Could everybody please review their answers to this particular poll
>> given these backgrounds? In particular since most answers are: choice
>> of xywh because "it is most common" or "it is in use by CSS" both of
>> which are incorrect.
>
> Sorry, I thought I had modified the question so this cons disappear (I
> haven't save the page apparently). But now the question should be more
> accurate:
>
> XYWH (aka. Top, Left, width, height):
> http://www.example.com/video.mov#xywh=20,20,20,20
>    * Pro: common
>    * Cons: need to specify whether w goes left/right and h goes up/down for
> xy position, could crop outside the media
>
> TRBL (aka. Top, Right, Bottom, Left):
> http://www.example.com/video.mov#trbl=40,20,20,40
>    * Pro: common (used by CSS), not possible to crop outside the media
> (assuming positive int)
>    * Sometimes confusing
>
> ... because there are people who really think that starting top right and
> ending bottom left is not the natural way to select a region :-)

Yes, the first time. :-) Seems web developers have no problem after that. :)
I guess the xywh appeals more to general programmers, but the trbl to
web developers, who have had contact with CSS before.
A tough decision to make.

Cheers,
Silvia.
Received on Tuesday, 27 January 2009 23:35:10 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Wednesday, 21 September 2011 12:13:32 GMT