[Bug 17673] Define Initialization Data for implementations that choose to support the ISO Base Media File Format

https://www.w3.org/Bugs/Public/show_bug.cgi?id=17673

--- Comment #17 from Henri Sivonen <hsivonen@hsivonen.fi> ---
(In reply to comment #16)
> As I understand it, the various DRMs include different things in their
> headers, not just the key id in different format. I'm told their choices of
> what to include are tightly tied to their design and specifically their use
> or not of certain IPR.

EME+PlayReady and EME+Widevine are already out there. What do they *need* to
include in pssh? Looking at the YouTube EME demo files that have pssh boxes for
PlayReady and another key system (maybe Widevine, but I'm not sure), all the
data in the pssh boxes seems redundant to me:
http://lists.w3.org/Archives/Public/public-html-media/2013May/0025.html

(Redundant assuming that the CENC layer knows about key ids, CENC fixes the key
length & the algorithm and the Web app knows its own license server URLs.)

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Received on Thursday, 15 August 2013 08:48:34 UTC