Ask HN: Experiences building document file format based on zip vs. sqlite

Besides the sqlite.org case study on using sqlite as a replacement for zip as a document file format - I have found little else comparing the two for use as a document file format, and what other people (not affiliated with sqlite) think about the two approaches. Do any of you have experience you can share as it relates to using zip or sqlite as a file format?

Some background: I work on a multimedia application that currently reads/writes entire documents on open/save. In addition to being slow, some customer's devices run out of memory when opening large files. I'm looking to move to a file format that allows me to stream from disk the images/videos as needed.

It seems moving to an approach where the file is required while editing could cause problems on networked drives, files in dropbox folders, disconnect-able drives - so if you have any thoughts on that, would love to hear it.