Supported Formats

OxiDex supports 140+ file format families with comprehensive metadata extraction and writing capabilities.

Legend:

• ✅ Fully Implemented - Read and write support with comprehensive tag coverage
• 🔄 Partial Support - Read support implemented, write support limited
• ⏳ Planned - On the roadmap for future implementation

Image Formats

JPEG (Joint Photographic Experts Group)

Status: ✅ Fully Implemented

File Extensions: .jpg, .jpeg, .jpe

Metadata Types:

• ✅ EXIF (Exchangeable Image File Format)
• ✅ XMP (Extensible Metadata Platform)
• ✅ IPTC (International Press Telecommunications Council)
• ✅ JFIF (JPEG File Interchange Format)
• ✅ GPS (Geolocation data)
• ✅ ICC Profile (Color management)
• ✅ Photoshop metadata
• ✅ Thumbnail extraction

Available Tags: 244 EXIF tags + 122 IPTC tags + XMP support

Common Use Cases:

• Digital camera photos
• Web images
• Social media uploads
• Scanned documents

TIFF (Tagged Image File Format)

Status: ✅ Fully Implemented

File Extensions: .tif, .tiff

Metadata Types:

• ✅ EXIF
• ✅ XMP
• ✅ IPTC
• ✅ GPS
• ✅ ICC Profile
• ✅ Photoshop
• ✅ Multi-page/multi-image support

Available Tags: 244 EXIF tags + TIFF-specific tags

Common Use Cases:

• Professional photography
• Archival images
• Scientific imaging
• Medical imaging (DICOM-TIFF)

PNG (Portable Network Graphics)

Status: ✅ Fully Implemented

File Extensions: .png

Metadata Types:

• ✅ PNG text chunks (tEXt, zTXt, iTXt)
• ✅ XMP
• ✅ EXIF (embedded via PNG chunks)
• ✅ ICC Profile
• ✅ Creation time (tIME chunk)
• ✅ Physical dimensions (pHYs chunk)

Available Tags: 30 PNG-specific tags + EXIF/XMP support

Common Use Cases:

• Web graphics
• Screenshots
• Lossless image archiving
• Images with transparency

RAW Camera Formats

Status: ✅ Fully Implemented (40+ formats)

Supported Formats:

• Canon: CR2, CR3, CRW
• Nikon: NEF, NRW
• Sony: ARW, SR2, SRF, SRW, ARQ, ARI
• Fujifilm: RAF
• Olympus: ORF, ORI
• Pentax: PEF
• Panasonic: RW2, RWL
• Hasselblad: 3FR, FFF
• Phase One: IIQ
• Mamiya: MEF
• Leaf: MOS
• Kodak: DCR, KDC
• Minolta: MDC, MRW
• Epson: ERF
• Sigma: X3F
• GoPro: GPR
• Adobe: DNG (Digital Negative)
• HEIF: HIF
• Light: LRI
• Sinar: STI
• Generic: RAW, CAM, REV

Metadata Support: EXIF, XMP, maker notes for each manufacturer

Video Formats

MP4/QuickTime

Status: ✅ Fully Implemented

File Extensions: .mp4, .m4v, .mov, .3gp, .3g2

Metadata Types:

• ✅ QuickTime atoms (moov, udta, meta)
• ✅ Creation/modification times
• ✅ Duration, dimensions
• ✅ GPS coordinates
• ✅ Camera make/model
• ✅ XMP packets

Available Tags: 143 QuickTime-specific tags

Common Use Cases:

• Video library management
• Smartphone video metadata
• Media asset databases
• GPS-tagged videos

Additional Video Formats

Status: ✅ Phase 1 Complete

• MKV/WebM (Matroska) - ✅ Complete
• FLV (Flash Video) - ✅ Complete
• AVI (Audio Video Interleave) - ✅ Complete
• MTS/M2TS (AVCHD) - ✅ Complete

Audio Formats

Status: ✅ Phase 1 Complete

• MP3 (ID3 tags) - ✅ Complete
• FLAC (Free Lossless Audio Codec) - ✅ Complete
• AAC (Advanced Audio Coding) - ✅ Complete
• WAV (Waveform Audio) - ✅ Complete
• OGG Vorbis - ✅ Complete
• Opus - ✅ Complete
• APE (Monkey's Audio) - ✅ Complete

Document Formats

PDF (Portable Document Format)

Status: ✅ Fully Implemented

File Extensions: .pdf

Metadata Types:

• ✅ PDF Info Dictionary (Title, Author, Subject, Keywords)
• ✅ Creation/Modification dates
• ✅ XMP metadata packets
• ✅ ICC profiles

Common Use Cases:

• Document metadata extraction
• PDF library management
• Compliance and archiving

PE (Portable Executable)

Status: ✅ Fully Implemented

File Extensions: .exe, .dll, .sys

Metadata Types:

• ✅ Version information
• ✅ File properties
• ✅ Digital signatures
• ✅ Resource metadata

Common Use Cases:

• Windows executable analysis
• Software inventory
• Security auditing

Metadata Standards

EXIF (Exchangeable Image File Format)

Status: ✅ Comprehensive Support

Supported in Formats: JPEG, TIFF, PNG, RAW formats

Tag Categories:

• Image structure (width, height, color space)
• Camera settings (ISO, aperture, shutter speed, focal length)
• Camera identification (make, model, serial number)
• Date/time stamps (original, digitized, modified)
• Image processing (white balance, exposure compensation, flash)
• Thumbnail images
• Copyright and author information

Available Tags: 718 tags from EXIF specification

Standards Compliance: EXIF 2.3 specification

XMP (Extensible Metadata Platform)

Status: ✅ Fully Implemented

Supported in Formats: JPEG, TIFF, PNG, PDF, MP4

XMP Namespaces:

• dc (Dublin Core) - Title, Creator, Rights, Description
• xmp - Base XMP properties
• xmpRights - Copyright management
• photoshop - Adobe Photoshop metadata
• exif - EXIF properties in XMP format
• tiff - TIFF properties in XMP format
• aux - Additional camera metadata
• iptcCore - IPTC Core metadata
• iptcExt - IPTC Extension metadata
• plus - Picture Licensing Universal System

Read Operations: ✅ Full XML parsing Write Operations: ✅ Full XML serialization

IPTC (International Press Telecommunications Council)

Status: ✅ Fully Implemented

Supported in Formats: JPEG, TIFF

IPTC Categories:

• Descriptive metadata (Caption, Keywords, Headline)
• Administrative metadata (Credit, Source, Copyright Notice)
• People and locations (City, Province, Country, Creator)
• Rights information (Usage Terms, Copyright Notice)
• Technical metadata (Date Created, Digital Creation Date)

Available Tags: 122 IPTC tags

Standards Compliance: IPTC Core 1.3, IPTC Extension

GPS Metadata

Status: ✅ Fully Implemented

Supported in Formats: JPEG, TIFF, MP4/MOV, RAW

GPS Tags:

• Latitude, Longitude (decimal degrees)
• Altitude (meters above sea level)
• Timestamp (UTC)
• Speed, Track (direction of movement)
• Satellites used, DOP (dilution of precision)
• Map Datum (coordinate system)
• Differential correction

Available Tags: 32 GPS-specific tags

Coordinate Formats: Decimal degrees, degrees/minutes/seconds (DMS)

Additional Metadata

ICC Profile (Color Management)

Status: ✅ Fully Implemented

Supported in Formats: JPEG, TIFF, PNG, PDF

Profile Information:

• Profile description
• Color space (RGB, CMYK, Lab)
• Rendering intent
• White point, primaries
• Gamma/transfer curve

Available Tags: 90 ICC Profile tags

Photoshop Metadata

Status: ✅ Fully Implemented

Supported in Formats: JPEG, TIFF, PNG

Photoshop Resources:

• Image resources (layers, paths)
• Copyright flag
• URL
• Credit, Source
• Caption Writer

Available Tags: 136 Photoshop-specific tags

Maker Notes

Status: ✅ Comprehensive Support (30+ manufacturers)

Canon MakerNotes: 930 tags

• Phase 1: Basic tags (ImageType, SerialNumber, ModelID)
• Phase 2: Array tags (CameraSettings, ShotInfo, FocalLength)
• Phase 3: Advanced (Lens database, AFInfo, FileInfo)

Nikon MakerNotes: 2,398 tags (main) + 3,512 tags (NikonCustom) Sony MakerNotes: 1,148 tags Pentax MakerNotes: 876 tags

Format Detection

OxiDex uses magic number detection to identify file formats:

1. Reads the first few bytes (magic number)
2. Matches against known format signatures
3. Falls back to file extension if ambiguous

Format Signatures:

Format	Magic Bytes	Offset
JPEG	FF D8 FF	0
PNG	89 50 4E 47 0D 0A 1A 0A	0
TIFF (LE)	49 49 2A 00	0
TIFF (BE)	4D 4D 00 2A	0
PDF	25 50 44 46 (%PDF)	0
MP4/MOV	66 74 79 70 (ftyp)	4

This ensures robust format detection even with incorrect extensions.

Performance by Format

Relative Performance (compared to baseline JPEG parsing):

Format	Read Speed	Write Speed	Notes
JPEG	1.0x (baseline)	1.0x	Optimized segment parsing
TIFF	0.9x	0.9x	IFD chain traversal
PNG	1.1x	1.1x	Simple chunk-based format
PDF	0.8x	0.8x	Object parsing
MP4/MOV	0.7x	N/A	Atom tree traversal

All formats process typical files in < 50ms on modern hardware.

Tag Database Statistics

Total Tags: 32,677 (113% of ExifTool's 28,853 tags)

Tags by Format Family:

• NikonCustom: 3,512 tags
• DICOM: 3,149 tags
• Nikon: 2,398 tags
• Sony: 1,148 tags
• QuickTime: 1,069 tags
• Canon: 930 tags
• Casio: 930 tags
• Pentax: 876 tags
• EXIF: 718 tags
• And 131+ more format families

Checking Format Support

Use the CLI to check format support:

oxidex photo.jpg

Supported formats will display metadata. Unsupported formats show:

Error: Unsupported file format: unknown

Future Roadmap

v1.1 (Current): 140+ format families with full read/write support ✅ v2.0 Goal: Enhanced maker notes support for all major camera vendors v3.0 Goal: Complete ExifTool tag parity (28,853+ tags)

Additional Resources

• Tag Database - Complete tag reference
• API Reference - Using formats in code
• CLI Usage - Command-line examples
• ExifTool Format Support - Original format list