The Media Working Group has published the following 14 updates of the Media Source Extensions™ (MSE) and Encrypted Media Extensions (EME) families of specifications. Unless otherwise noted, the updates are maintenance releases of specifications previously published by the now closed HTML Media Extensions Working Group:

• Media Source Extensions™ Byte Stream Formats:
  • Media Source Extensions Byte Stream Format Registry, published as a Draft Registry.
  • WebM Byte Stream Format, published as a Group Note.
  • ISO BMFF Byte Stream Format, published as a Group Note.
  • MPEG-2 TS Byte Stream Format, published as a Group Note.
  • MPEG Audio Byte Stream Format, published as a Group Note.
• Encrypted Media Extensions, published as a First Public Working Draft with two new minor features compared to the previously published Recommendation (encryption scheme capability detection and ability to query the status of a key associated with an HDCP policy). The inclusion of other features is out of scope for the Media Working Group.
• Encrypted Media Extensions HDCP Version Registry, published as a Draft Registry. This new non-normative document provides a mapping between High-bandwidth Digital Content Protection (HDCP) version strings and HDCP specifications.
• Encrypted Media Extensions Initialization Data Formats:
  • Encrypted Media Extensions Initialization Data Format Registry, published as a Draft Registry.
  • "cenc" Initialization Data Format, published as a Group Note.
  • "keyids" Initialization Data Format, published as a Group Note.
  • "webm" Initialization Data Format, published as a Group Note.
• Encrypted Media Extensions Stream Formats:
  • Encrypted Media Extensions Stream Format Registry, published as a Draft Registry.
  • ISO Common Encryption Protection Scheme for ISO Base Media File Format Stream Format, published as a Group Note.
  • WebM Stream Format, published as a Group Note.