Packaging for WP Audiobooks

A packaging standard is required for Audiobooks, and WP as a whole. The best option would be to find something that works for both WP and Audiobooks, unless technical requirements prevent it. To make the best decision, it is best to compare the potential options.

TODO:

• add info on Matroska and it's relationship to WebM

	OCF	OCF (lite)	Pure ZIP	OPC	MPEG4 Part 14	Web Packaging	HEIF
Specification link	Link	[OCF Lite]	Link	Link	Link	Link	dsinger preso
Spec status	mature, IDPF rec, CG draft	doesn't exist	mature	mature, ISO/IEC	mature	wildly experimental	unknown
Format	Zip	Zip	Zip	Zip	MP4	CBOR	n/a?
Where to start?	/META-INF/container.xml points to package.opf	index.html? other well-known filename?	no convention	---	n/a	WAM manifest with start_url?	?
What system(s) supports it?	EPUB Reading Systems	?	everything but browsers	?	iTunes, various audio/media players	Chrome behind flags	?
Additional features	digital signatures, encryption, multiple renditions	?	?	?	bookmarkable	provides signed web origin	?
Pros	widely used in EPUB, well understood	can be designed to our requirements?	ubiquitous, simple	?	you can make and listen to audio books today	compatible with web security model	?
Cons	more complex than needed	doesn't yet exist	boring	?	hard to figure out capabilities; possibly patent encumbered	not ready, lots of complexity	?

Requirements and Success Criteria

Packaging for WP and Audiobooks should fit into the following requirements:

• Simple - the option we choose should be straightforward and understandable to the industry
• Distributable
• Streamable

Key Questions for Consideration

• What should be encoded vs. contained?