28269 2015-03-22 00:21:31 +0000 [webvtt] 6.2.1 line heights [I18N-ISSUE-436] 2016-10-11 18:59:55 +0000 1 1 1 Unclassified TextTracks CG WebVTT unspecified PC All VERIFIED WORKSFORME widereview changeDeclined, decided P2 normal --- 1 silviapfeiffer1 dave.null addison philipj silviapfeiffer1 singer zcorpan public-texttracks oldest_to_newest 118781 0 silviapfeiffer1 2015-03-22 00:21:31 +0000 Feedback by Addison Phillips from W3C I18N group: http://lists.w3.org/Archives/Public/public-tt/2015Mar/0068.html I18N comment: https://www.w3.org/International/track/issues/436 6.2.1 Processing model http://www.w3.org/TR/2014/WD-webvtt1-20141111/#h4_processing-model "Let lineHeight be '5.33vh' ('vh' is a CSS unit) [CSSVALUES] and regionHeight be the text track region lines." It wasn't clear whether this sets the line-height for cue content to be a fixed height, or whether it's possible to adapt that height for scripts such as Tibetan, Thai or Arabic, which require far more vertical line height than, say, Latin text. 118853 1 philipj 2015-03-23 04:17:29 +0000 The default line height can be overridden by CSS, using ::cue { line-height: 10vh } or similar. (Note that the vh unit doesn't actually work with WebVTT in any implementation AFAIK, so maybe px in the real world.) Resolving this as WORKSFORME, please reopen if I've misunderstood the problem. 127736 2 singer 2016-10-11 18:33:08 +0000 Note that for many international cases, you really need to have the ability to associate CSS. Is it clear whether VTT user-agents have to have a CSS implementation or merely parse style blocks? 127738 3 silviapfeiffer1 2016-10-11 18:39:41 +0000 Addison, could you provide feedback on this bug and if you're ok with the resolution? Thanks! 127739 4 addison 2016-10-11 18:58:33 +0000 I think this works for me.