Re: [WebVTT] Karaoke and other animations

Hi Henrik,

I'll address your second animation type first, because it is already
covered in WebVTT with WebVTT cue timestamps as per
https://w3c.github.io/webvtt/#webvtt-cue-timestamp . Here's an example
of this: http://chinesecubes.github.io/react-vtt/ .

As for the first animation type - subtitles that try to follow
movement in the video - this is an extension that we could add for the
next version of WebVTT. Can I encourage you to register a bug on
github at https://github.com/w3c/webvtt/issues/new with a detailed
description of the use case where this is required? Right now, we have
focused on supporting the main use cases of a time-aligned text
format.

Kind Regards,
Silvia.


On Sat, Sep 9, 2017 at 12:59 AM, Henrik Andersson <henke@henke37.cjb.net> wrote:
> I read the spec [1] and while I find it generally well thought out and
> covering a lot of use cases, it however fails to cover some of the more
> advanced use cases seen in action in some less-than-official subtitles.
> For example as seen in ASS subtitles [2]
>
> I am talking about animation for the subtitles. Two main types of
> animation to be specific.
>
> The first is subtitles that try to follow movement in the video. From an
> implementer standpoint it means freeform animation of the cue as
> displayed with timing information relative to the cue. The css keyframes
> system may be relevant here.
>
> The second is subtitles that display karaoke. That is, visual aid to the
> viewer for which syllable has, is and will be audible next. This is
> traditionally used to allow singalong for songs.
>
> Best regards from someone who likes subtitles.
>
> [1] https://w3c.github.io/webvtt/
> [2] http://docs.aegisub.org/3.2/ASS_Tags/
>

Received on Tuesday, 12 September 2017 06:16:47 UTC