This specification defines the Initialization Data formats for use with the Encrypted Media Extensions [ENCRYPTED-MEDIA].
Some formats may be extracted from media data [HTML5] as defined in the Encrypted Media Extensions Stream Format Registry [EME-STREAM-REGISTRY]. All may be provided separately, such as via a manifest or other application data.
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This document was published by the Media Working Group as an Editor's Draft.
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Publication as an Editor's Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.
This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.
This document is governed by the 1 March 2019 W3C Process Document.
This registry is intended to enhance interoperability among implementations and users of encrypted media streams with the Encrypted Media Extensions (EME) specification [ENCRYPTED-MEDIA]. In particular, this registry provides the means (1) to identify and avoid collisions among initialization data type strings, and (2) to disclose information about initialization data formats accepted by EME implementations to promote interoperability.
The registry maintains a mapping between Initialization Data Type strings and format specifications, which describe the structure and semantics of initialization data.
The strings are those used for
initDataType values provided by and to Encrypted Media Extensions [ENCRYPTED-MEDIA] APIs.
This registry is not intended to include any information on whether a format is encumbered by intellectual property claims. Implementors and users are advised to seek appropriate legal counsel in this matter if they intend to implement or use a specific format.
Each entry must include a unique Initialization Data Type string.
Each entry must include a link that references a publicly available specification. It is RECOMMENDED that such a specification be made available without cost (other than reasonable shipping and handling if not available by online means).
Candidate entries must be announced on email@example.com(subscribe, archives) so they can be discussed and evaluated for compliance before being added to the registry.
Per the Encrypted Media Extensions specification, entries MUST be fully specified and support common formats such that instances of the format can be processed in a fully specified and compatible way.
|Initialization Data Type||Public Specification(s)|
|cenc||"cenc" Initialization Data Format [EME-INITDATA-CENC]|
|keyids||"keyids" Initialization Data Format [EME-INITDATA-KEYIDS]|
|webm||"webm" Initialization Data Format [EME-INITDATA-WEBM]|