metadata-extractor-dotnet

• Add support for Netpbm files
• Add support for PNG zTXt chunks
• Panasonic makernote strings are UTF-8, not ASCII
• Rework JPEG segment reading and modelling. Add JpegSegment class, replacing JpegSegmentData collection class with IEnumerable<JpegSegment>.
• Add SequentialReader.Position property
• Annotations

• *Reader.GetString methods now require Encoding
• Include ReShaper annotations in NuGet packages
• Annotations

• Directory holds string data as byte arrays (within new StringValue value type), allowing consumers to override the encoding after extraction (thanks to Kevin Mott)
• Support Reconyx makernote (thanks to Todd West)
• Support Apple makernote data
• API documentation improvements
• Makernote processing doesn't require Exif IFD0 to be present
• Consistent capitalisation of QuickTime* (minor breaking change)
• Use TryParse methods in XMP processing, rather than Parse within try/catch
• Bump version of XmpCore package to 1.2.2

Fixes:

• Potential OutOfMemoryException due to overflow arithmetic errors in TiffReader (@dusan-rychnovsky drewnoakes/metadata-extractor#167)
• Off-by-one error in IptcReader when last tag in data was one byte in length (@cshclm drewnoakes/metadata-extractor#172)

Features:

• Massive expansion of support for Olympus makernotes and RAW (@kwhopper #44 #45 #46 #47)

Testing:

• Added a long-running test that mutates valid Exif (JPEG APP1) segments to try and get ExifReader to throw an exception. Mutating every byte through 0x00-0xFF, and parsing. So far no errors have been uncovered, and this just serves as a reassuring observation.

• Support tags pointing to multiple sub-IFDs (@kwhopper #42)
• Decode IFDs pointed to by ExifDirectoryBase.TagSubIfdOffset (#42)
• Capture some heirarchy information between Directory instances
• Support more XMP tags
• Support VP8L and VP8 chunks in WebP files
• Decode many more Canon Makernote tags (#33 @kwhopper)

• PCL support (for Xamarin Android/iOS etc)
• Support for QuickTime video (MOV, MP4, ...)
• Support non-standard sub-IFD pointers (@kwhopper)
• Handle TIFF IFD0 ApplicationNotes tag (0x02BC) as XMP (#40 @kwhopper)
• Support alternate Olympus makernote format (drewnoakes/metadata-extractor#93)
• Scan for next valid JPEG segment when data corrupted (drewnoakes/metadata-extractor#129 @ArjohnKampman)
• Several improvements around time zones and dates/times (@nagix)
• Fixes to
  • Fix Nikon EV value calculation @kwhopper
  • Skip unsupported Photoshop IRBs rather than throwing
  • Use newer version of XmpCore project, fixing some XMP bugs
  • Attempt to detect and correct invalid byte order for a single IFD (drewnoakes/metadata-extractor#136)
  • Fix flipped JPEG horiz/vert sampling factors (drewnoakes/metadata-extractor#152, drewnoakes/metadata-extractor#156)
  • Consistent capitalisation of tag names and some constants

• Adds support for .NET v3.5. Previous versions required .NET 4.0.
• Source code migrated to C# 6 including string interpolation, readonly properties, expression body properties, property initialisers, nameof and null propagation.
• Some small performance improvements.
• Various API documentation tweaks.
• Removes Directory.Get*Nullable in favour of Directory.TryGet*. Capitalisation changes to some uncommonly used API members.
• Make Rational a value type.

This is the first release of metadata-extractor for .NET, the official port of the Java library which has been in development since 2002. Both the C# and the .NET implementations are now being co-developed to be feature equivalent and produce the same output over the project's database of images.

NuGet is the simplest way to add this library to your project.