Re: "WebVTT file using only nested cues"

On Wed, 25 Apr 2012 00:07:47 +0200, Ian Hickson <ian@hixie.ch> wrote:

> On Fri, 27 Jan 2012, Simon Pieters wrote:
>>
>> "A WebVTT file whose cues all have an end time offset x greater than or
>> equal to the end time offsets of all the cues whose start time offsets
>> are less than x is said to be a WebVTT file using only nested cues."
>> http://dev.w3.org/html5/webvtt/#webvtt-file-using-only-nested-cues
>>
>> I have two problems with this definition. First, it takes considerable
>> mental focus to understand what it means (at least for me). It would be
>> nice if it could be explained more clearly
>
> If you can describe it formally and completely in a clearer fashion,
> please let me know. I couldn't figure out a better way to do it.
>
>
>> and/or give examples that match the definition and examples that don't.
>
> Done.

Thanks.


>> Secondly, the name implies that all cues must be nested, since the file
>> is said to be using "only" nested cues, but this is not the case
>
> On what sense is it not the case?

WEBVTT

00:00.000 --> 01:24.000
Introduction

01:24.000 --> 05:00.000
Scrolling Effects

This file has no nested cues but still matches the definition.

>
>> so maybe the definition should have a more accurate name. I was
>> considering "WebVTT file with no overlapping cues", but that's not
>> accurate either if nested cues are also overlapping.
>
> Nested cues by definition overlap. :-)
>


-- 
Simon Pieters
Opera Software

Received on Wednesday, 25 April 2012 05:52:27 UTC