drewnoakes/metadata-extractor

Extracting Externally Specified Metadata from HEIF (EXIF, XMP, MPEG-7)

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#371 opened on Oct 15, 2018

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 (4 comments) (1 reaction) (0 assignees)Java (470 forks)batch import
help wanted

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Description

Expected Behavior

Metadata-Extractor will also check for/extract externally specified metadata (EXIF, XMP, and MPEG-7)

Current Behavior

Metadata-Extractor only extracts metadata specified by HEIF itself

Detailed Description

There is potential for externally specified metadata: EXIF, XMP, and MPEG-7. More information on how to get at this data is provided in Annex A of ISO/IEC 23008-12:2017.

Issue originally branched from #362 : 4. cannot get the Exif info from the mdat box, I think this feature has not been implemented yet. :)

Contributor guide

Research direction
Study Annex A of ISO/IEC 23008-12:2017 to understand how EXIF, XMP, and MPEG 7 metadata are stored in HEIF files. Implement parsing of the relevant boxes (e.g., 'uuid' boxes with special UUIDs for Exif and XMP, or 'mdat' box inspection).
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaHEIF format knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40