- From: David Singer <singer@apple.com>
- Date: Tue, 02 Apr 2013 09:44:20 -0700
- To: Pierre-Anthony Lemieux <pal@sandflow.com>
- Cc: public-html-media@w3.org
On Apr 2, 2013, at 7:50 , Pierre-Anthony Lemieux <pal@sandflow.com> wrote: > Couple of thoughts on EME and timed text following up on our last call. > > - requirements for captions can be different from other kinds of timed > text, e.g. subtitles and karaoke. I am not convinced the possibility > of encrypted timed text can be excluded. > > - the (proposed) MPEG Part 30 allows carriage of timed text (WebVTT > and TTML) as part of the media data. Shouldn't EME apply in that case? > If not why? If yes, the following note in EME probably needs to be > revised: "Q: Can I encrypt captions / <track> elements? A: No, this > proposal only supports decrypting audio and video that are part of the > media data." I rather think it should say that it only supports decrypting the media data that's delivered, perhaps? If there is a timed text track in the (say) MP4 file, why wouldn't the EME and MSE just work? > > Looking forward to the discussion. > > Best, > > -- Pierre > David Singer Multimedia and Software Standards, Apple Inc.
Received on Tuesday, 2 April 2013 16:44:48 UTC