[Bug 24027] Define a generic Initialization Data solution for ISO Base Media File Format and/or Common Encryption (will be used by Clear Key)

https://www.w3.org/Bugs/Public/show_bug.cgi?id=24027

--- Comment #16 from Joe Steele <steele@adobe.com> ---
(In reply to Mark Watson from comment #15)
> (In reply to David Dorwin from comment #14)
> > (In reply to Mark Watson from comment #13)
> > The KID_count and KID portion apparently come from a draft of the second
> > edition of the CENC spec. This is a dependency we would have to consider.
> > Also, it's unclear if this is actually the intended usage for these values.
> 
> Per an email discussion with Kilroy Hughes, the intended usage of the
> KID_count and KIDs is to indicate in a DRM-agnostic way the KIDs of the keys
> that are described by this PSSH. This enables DRM-independent de- or
> re-fragmentation of the file.
> 
> The same KIDs would usually also be specified in the DRM-specific contents
> of the PSSH box.

This is inline with Adobe's usage of KID and KID_count.

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Received on Monday, 28 April 2014 22:51:54 UTC