https://github.com/erikyo/filemeta

https://github.com/erikyo/filemeta

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/erikyo/filemeta
• Owner: erikyo
• Created: 2022-03-29T10:31:41.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-03-31T10:08:38.000Z (almost 3 years ago)
• Last Synced: 2024-10-10T00:42:26.161Z (3 months ago)
• Language: PHP
• Size: 18.2 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# FileMeta lib

- filemeta.php: the php class 

- globs.php: the hex definitions

- index.php: nonthing special... this only a page that load some images in order to test the class functionalities

## Magic numbers

https://en.wikipedia.org/wiki/List_of_file_signatures

## Supported formats

https://www.w3schools.com/html/html_media.asp

### webp (web picture?)

- [RIFF Header](https://developers.google.com/speed/webp/docs/webp_lossless_bitstream_specification#2_riff_header)

- [GUIDELINES FOR HANDLING IMAGE METADATA](https://web.archive.org/web/20180919181934/http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf)

- [WebP Lossless Bitstream Specification](https://developers.google.com/speed/webp/docs/webp_lossless_bitstream_specification)

- [RIFF extractor](https://doc.wikimedia.org/mediawiki-core/1.27.3/php/classRiffExtractor.html#aa9abd61e6595db90574ac5ee597d263e)

### .jpg|.avif|jfif && .tiff|.psd.. (JFIF - JPEG File Interchange Format)

- [JPG Structure](https://exiftool.org/TagNames/JPEG.html)

- https://github.com/corkami/formats/blob/master/image/jpeg.md

### .png|.apng (Portable Network Graphics)

- [PNG Structure](https://www.w3.org/TR/PNG-Structure.html)

### .gif (Graphics Interchange Format)

- [GIF Structure](https://www.w3.org/Graphics/GIF/spec-gif89a.txt)

### video samples

https://download.blender.org/peach/bigbuckbunny_movies/

### audio samples

https://espressif-docs.readthedocs-hosted.com/projects/esp-adf/en/latest/design-guide/audio-samples.html

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credits https://doc.wikimedia.org/mediawiki-core/