[webvtt] Default font size `5vh` leads to very large cues for vertical videos (#522)

jernoble has just created a new issue for https://github.com/w3c/webvtt:

== Default font size `5vh` leads to very large cues for vertical videos ==
The spec currently says:
>  The [font](https://drafts.csswg.org/css-fonts-4/#propdef-font) shorthand property on the (root) [list of WebVTT Node Objects](https://w3c.github.io/webvtt/#list-of-webvtt-node-objects) must be set to 5vh sans-serif. 

This value of `5vh` leads to unreasonably large cues for vertical videos. See example here: http://jernoble.github.io/samples/bin/WebVTT/resize-aspect.html

Instead, the spec could use `5vmin` (or actually, move away from redefining viewports entirely and use `5cqmin` instead). The example above allows you to switch between `5vh` and `5vmin` to see the difference in behavior.


Please view or discuss this issue at https://github.com/w3c/webvtt/issues/522 using your GitHub account


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Received on Thursday, 9 November 2023 23:57:16 UTC