W3C home > Mailing lists > Public > public-texttracks@w3.org > September 2012

Re: iOS6 WebVTT TextTrack Support in Safari

From: Eric Carlson <eric.carlson@apple.com>
Date: Wed, 26 Sep 2012 13:33:24 -0700
Cc: public-texttracks@w3.org
Message-id: <2C5115B1-0977-4473-A420-42B4C3AEDA8C@apple.com>
To: John Foliot <john@foliot.ca>, "Goldstein, Glenn" <glenn.goldstein@viacom.com>

On Sep 26, 2012, at 11:54 AM, John Foliot <john@foliot.ca> wrote:

> Goldstein, Glenn wrote:
>> 
>> does anyone know if iOS6 safari has text track support for
>> webVTT on iPhone?
>> 
>> my simple tests that work in Chrome Canary are not rendering
>> webVTT on iOS6.
>  
> Hi Glenn,
> 
> As far as I can recall, this might be an open issue for mobile delivery
> (both iOS as well as Android and possibly others). I believe the issue is in
> managing 2 data-streams concurrently on the mobile devices (bandwidth and
> processing), which hand off video to the native video players on the
> hand-helds, and do not use the web browser like on the desktop experience.
> 
  The lack of WebVTT support in MobileSafari on iOS 6 has nothing to do with any of this, we just didn't have enough time to implement it.

> I am unaware of a proposed solution at this time short of burned-in
> captions, coupled with some server-side sniffing (or maybe media-queries?)
> to deliver the correct media file to the hand-held device(s) - but happy to
> be schooled otherwise.
> 
  In-band captions, eg. captions in an MPEG-4 container, have been supported on iOS for some time.

eric
Received on Wednesday, 26 September 2012 20:34:00 GMT

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