RE: Where to submit issues with VTT display spec?

Excellent. I think it may have something to do with this line on entry 2 (https://www.w3.org/TR/webvtt1/#processing-cue-settings)

“If the computed position alignment is center, and the computed position is greater than 50. Let maximum size be the result of subtracting computed position from 100 and then multiplying the result by two.”

Whereas, I’d expect every cue to have some sort of minimum width once reaching N characters, if size or alignment isn’t set AND also still be on screen even if a high/lo position value would typically push it completely off-screen.

I’ll file the bug for evaluation in any case, for others who know this spec better than I to weigh in.


From: Gary Katsevman
Sent: Tuesday, November 9, 2021 8:55 AM
To: Chris LaChance
Cc: Public TTWG List
Subject: Re: Where to submit issues with VTT display spec?

Hi Chris,

You've definitely found the right group.

If you think it's an issue with the specification itself, which seems to be what you're saying, you should file a bug on the WebVTT repo: https://github.com/w3c/webvtt/
However, if you think that a bug is only a browser issue, you should file a bug against each browser.

Looking at your example, it seems that it is indeed implemented to spec, but I'd have to spend some more time thinking about this to know whether this is a spec issue or not.

Thanks,
Gary.

On Tue, Nov 9, 2021 at 6:37 AM Chris LaChance <me@chrislachance.com> wrote:
Hi all, not sure if you are the right group, but I’m seeing consistent cross-browser issues with the rending of VTT tracks where position is set to a high number or low number – alignment and size are not.

In each case text is either lost, or crushed to a single character and it seems it has something to do with the spec’s expectations themselves.

You can see the issue live in any browser here by increasing position to 100.
https://ronallo.com/demos/webvtt-cue-settings/

There are slew of other cross-browser issues as well – https://chrislachance.com/web-captions-3-caption-styling-challenges/ which I’ve filed as bugs for each modern browser.


Anyways, if this isn’t the right group, I’d love to be pointed in the right direction.
Thanks for all you guys do.