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Re: Re: TTML and aspect ratio

From: Glenn Adams <glenn@skynav.com>
Date: Thu, 31 Jan 2013 07:59:07 -0700
Message-ID: <CACQ=j+cjpHFhi9dOfANcufUs91Ek6XrDzM78HfHXctAW+EDp9w@mail.gmail.com>
To: David Ronca <dronca@netflix.com>
Cc: "public-tt@w3.org" <public-tt@w3.org>
On Thu, Jan 31, 2013 at 7:52 AM, David Ronca <dronca@netflix.com> wrote:

> >btw, SDP-US goes beyond TTML and specifies requirements regarding the
> >relationship between the root container region and the related media
> >object, see R0016 and R0017 [1]
>
> There is a requirement that the root container must encompass the entire
> video window.  For a 16x9 video window, <ttpCellResolution="32,15"> would
> result in caption area that is stretched horizontally.
>

Not really. Keep in mind that the concept of cell in TTML does not
translate to anamorphic scaling. Rather, it is simply used as a grid for
resolving location expressions, such as used with tts:origin and tts:extent
on region elements.
Received on Thursday, 31 January 2013 14:59:55 GMT

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