Media Source Extensions Byte Stream Format Registry

This registry is intended to enhance interoperability among implementations and users of SourceBuffer objects described in the Media Source Extensions™ specification. In particular, this registry provides the means (1) to identify and avoid MIME-type collisions among byte stream formats, and (2) to disclose information about byte stream formats accepted by MSE implementations to promote interoperability.

The registry maintains a mapping between MIME-type/subtype pairs and byte stream format specifications. The byte stream format specifications describe the structure and semantics of byte streams accepted by SourceBuffer objects created with the associated MIME-type/subtype pair.

This registry is not intended to include any information on whether a byte stream 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 byte stream format.

To register an entry, file an issue in the Media Source Extensions Byte Stream Format Registry GitHub issue tracker so it can be discussed and evaluated for compliance before being added to the registry.

The Media Working Group may seek expertise from outside the Working Group as part of its evaluation, e.g., from the editors or relevant standards group of the underlying format specification. If the underlying format specification is not publicly available, it must be made available to the Working Group for evaluation. For the entry to be included, there needs to be interest from at least one implementer in the Media Working Group. If the Media Working Group reaches consensus to accept the candidate, send a pull request (either by the registry editors or by the party requesting the candidate registration) to register the candidate that meets the following requirements:

1. Each entry must include a unique MIME type/subtype pair. If the byte stream format is derived-from an existing file format, then it should use the MIME type/subtype pairs typically used for the file format.
2. Each entry must include a [[generate timestamps flag]] value that must be used by SourceBuffer when handling the byte stream format.
3. Each entry must include a link that references a publicly available registration specification.
4. The registration specification for each entry must comply with all requirements outlined in the Byte Stream Formats section of the Media Source Extensions™ specification [MEDIA-SOURCE].
5. It is recommended that the registration specification and the underlying specifications be made available without cost (other than reasonable shipping and handling if not available by online means).

Once consensus is reached by the Working Group, the registry editors will review and merge the pull request.

Existing entries may be changed after being published, through the same process as candidate entries. Possible changes include modification of the link to the public specification.

If a registration fails to satisfy a mandatory requirement specified above, then it may be removed from the registry. Existing entries cannot be deleted or deprecated otherwise.