This specification defines the "webm" Initialization Data format for use with the Encrypted Media Extensions [ENCRYPTED-MEDIA]. This format is commonly used with the WebM Stream Format [EME-STREAM-REGISTRY].

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1. Format

The format is a single key ID of one or more bytes, as defined by the ContentEncKeyID [Matroska] element and [WebM-Encryption].

A. References

A.1 Normative references

David Dorwin; Jerry Smith; Mark Watson; Adrian Bateman. W3C. Encrypted Media Extensions. 29 April 2016. W3C Working Draft. URL: http://www.w3.org/TR/encrypted-media/
Matroska. Matroska Specifications. 9 January 2014. URL: http://matroska.org/technical/specs/index.html
Frank Galligan. The WebM Project. WebM Encryption. 4 March 2015. URL: http://www.webmproject.org/docs/webm-encryption/

A.2 Informative references

David Dorwin; Adrian Bateman; Mark Watson. W3C. Encrypted Media Extensions Stream Format Registry. URL: https://wwww.w3.org/TR/eme-stream-registry/