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Re: how does EME/DRM effect captioning

From: Mark Watson <watsonm@netflix.com>
Date: Tue, 2 Apr 2013 06:56:00 -0700
Message-ID: <2605706884603577320@unknownmsgid>
To: Henri Sivonen <hsivonen@iki.fi>
Cc: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Glenn Adams <glenn@skynav.com>, Steve Faulkner <faulkner.steve@gmail.com>, HTMLWG WG <public-html-media@w3.org>, HTML Accessibility Task Force <public-html-a11y@w3.org>
Sent from my iPhone

On Apr 2, 2013, at 2:30 AM, Henri Sivonen <hsivonen@iki.fi> wrote:

> On Tue, Apr 2, 2013 at 12:10 PM, Silvia Pfeiffer
> <silviapfeiffer1@gmail.com> wrote:
>> I'd actually be curious about this as well, because I've heard people state
>> that captions are just as valuable and as much "content" as the video
>> itself, in their own right. So, I'm curious to hear whether people expect to
>> send their captions also in encrypted form when they distribute encrypted
>> content or whether they're happy to provide them in the clear through a
>> <track> element.
>
> Well, people state all sorts of things. See font DRM claims before and
> after Web fonts happened (without DRM).
>
> The question is:
> If DRM in browsers is available for video and audio but not for
> captions and regulations require captions if audio is provided, will
> movie streaming services refuse to stream movies to browser because
> they couldn't apply DRM to the captions? Seems highly implausible that
> the answer would be "yes".
>
> In the Silverlight-based Netflix player, do the captions go through
> PlayReady or not? If not, there's really no issue here.

No, the captions are delivered in the clear using TTML.

...Mark
>
> --
> Henri Sivonen
> hsivonen@iki.fi
> http://hsivonen.iki.fi/
>
Received on Tuesday, 2 April 2013 13:56:33 UTC

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