drewnoakes/metadata-extractor

End of data reached when parsing photoshop directory of jpg

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#551 opened on Aug 30, 2021

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Description

One of our photographers had a problem with the image linked below. The actual error that happens is "End of data reached." for the Photoshop directory. He told me the problem persisted even after cropping the image. This leads me to believe it is not simply a corrupt image but either a bug in either Lightroom (that outputs invalid meta data) or in this library.

What also smells funny is that it ends up producing two Photoshop directories with errors in them. I read in the PhotoshopReader class that it will produce both Photoshop and IPTC directories so maybe it is the culprint.

image

https://www.dust2.dk/img/problemsample.jpg

Contributor guide

Tech stack
java
Domain
backenddatatooling
Issue type
bug
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.
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.
needs investigation
Prerequisites
Java knowledgeImage metadata formatsFamiliarity with metadata extractor library
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the PhotoshopReader class, particularly the parsing logic that leads to 'End of data reached' and duplicate directories. Reproduce the issue using the sample image linked. Examine how Photoshop and IPTC directories are handled to identify the root cause of the parsing failure and duplication.