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 (2,411 stars) (470 forks)batch import
help wanted

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

Tech stack
java
Domain
data
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Understanding of HEIF box structureJava programmingFamiliarity with metadata extractor library
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate the HEIF box structure to identify where externally specified metadata (EXIF, XMP, MPEG 7) are stored. Review Annex A of ISO/IEC 23008-12:2017. Examine existing metadata extractors for HEIF in the repository, likely in the 'com.drew.metadata.heif' package. Consider how to parse 'uuid' boxes and associated data. Check comments on related issue #362 for additional context.