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IIIF / iiif-av

The International Image Interoperability Framework (IIIF) Audio/Visual (A/V) Technical Specification Group aims to extend to A/V the benefits of interoperability and the growing ecosystem of clients and servers that IIIF provides for images. This repository contains user stories and mockups for interoperable A/V content – contributions are welcome.
http://iiif.io/community/groups/av/
Apache License 2.0
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Ability to describe a master file that's not available #39

Open jronallo opened 7 years ago

jronallo commented 7 years ago

Description

Ability to describe a master file that's not available. Might have only delivery of different formats from it. Do publish metadata about it. Want consistent time codes between master and delivery copy. Behind the scenes implementation detail that user doesn't care about. e.g. someone annotated interesting part of derivative video, can then go back to master to re-extract more high quality version.

Scope: ?

Implementation detail? System needs to know the background mappings (e.g. jp2 -> png in Image API, without making jp2 available).

Give access to full quality, but only small segments. Max but for temporal region, rather than size. Describe the image qualities of a single frame extracted from the underlying video source. Turn video/canvas+time into image api identifier, and fetch info.json for it. -> relates to Download still frame from video as image use case and how that service is described

Additional Background

Source: BL workshop notes Interest: 60%

azaroth42 commented 7 years ago

Not on the web = doesn't exist.

jronallo commented 7 years ago

You could if you liked point to external metadata about a master file, or include that information for presentation in the metadata, but if it is not a file someone can to get over the web then it seems out of scope.

azaroth42 commented 7 years ago

I think the only actionable part of this use case is the equivalent of "max" in the Image API -- that there might be a 4k quality video at the backend, but the maximum you can get is 640x480 (or similar). This has real value in the Image API as it means you can get tiles at higher resolution than you can get the full image. .. but what would it do in Audio or Video?

zimeon commented 7 years ago

In case where there are derivative snippets available then alignment of these on same timeline as hidden master is related to the redaction use case #26 and description of gaps #12.