The Media Working Group maintains registries related to some of its specifications on the Recommendation track, namely Media Source Extensions (MSE), Encrypted Media Extensions (EME) and WebCodecs. The registries are published on the Registry Track as Registry Drafts. The Media Working Group would like to advance these documents on the Registry Track by publishing them as Candidate Registry Snapshot.

We're taking the liberty to request a review of all the registries at once and without further analysis because the registries all have similar registration entry requirements, and because it isn't clear to us what input you might be willing to receive to help your review of such documents. By definition, registries document values, they do not define any architectural or interoperability requirements related to those values. We would expect comments on these requirements to be raised against the underlying specifications (MSE, EME, WebCodecs).

You may raise issues that apply to all registries using the tracking issue at https://github.com/w3c/media-wg/issues/64. More specific issues may be raised in the repositories that hold the documents.

Registry linked to MSE (GitHub repo):

• Media Source Extensions Byte Stream Format Registry

Registries linked to EME (GitHub repo):

• Encrypted Media Extensions Initialization Data Format Registry
• Encrypted Media Extensions Stream Format Registry
• Encrypted Media Extensions HDCP Version Registry

Registries linked to WebCodecs (GitHub repo):

• WebCodecs Codec Registry
• WebCodecs VideoFrame Metadata Registry

Note: Most of the registries related to MSE and EME used to be published on the Note track (simply because the Registry track did not exist at the time of publication).

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