drewnoakes/metadata-extractor

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

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#371 创建于 2018年10月15日

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 (4 评论) (1 反应) (0 负责人)Java (2,411 star) (470 fork)batch import
help wanted

描述

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. :)

贡献者指南

技术栈
java
领域
data
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Understanding of HEIF box structureJava programmingFamiliarity with metadata extractor library
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
25
研究方向
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.