metadata 1.0.2
metadata: ^1.0.2 copied to clipboard

metadata helps to extract metadata from your files.

metadata #

Platform Pub Package License: MIT Donate Issue Forks Stars

metadata is a dart library to extract exif data of the images. It is purely written in dart, So it can be used on server as well as on client.

Table of Contents #

Lets Get Started #

1. Depend on it #

Add this to your package's pubspec.yaml file:

dependencies:
  metadata: ^1.0.2

2. Install it #

You can install packages from the command line:

with pub:

$  pub get

3. Import it #

Now in your Dart code, you can use:

    import 'package:metadata/metadata.dart';

Usage #

Imports #

    import 'package:metadata/metadata.dart';
    

Read Image File #

    var file = "path_to_pre_existing_image_file/image.jpg";
    var bytes = File(file).readAsBytesSync();
    

Read Image from Flutter's Asset Folder #

    import 'package:flutter/services.dart' show ByteData, rootBundle;
    
    /* Your blah blah code here */
    
    ByteData data = await rootBundle.load("assets/path_to_pre_existing_image_file/image.jpg";);
    var bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
    

Extract Exif Data #

    var result = MetaData.exifData(bytes);
    if (result.error == null) {
      var content = result.exifData; // exif data is available in contents
      saveFile(image_name, content);
    } else {
      print('File: $image.jpg, Error: ${result.error}');
    }
    

Extract Exif Data with callback #

    MetaData.exifData(bytes, onValue: (CallBack result) {
      if (result.error == null) {
        var content = result.exifData;
        saveFile(image_name, content);
      } else {
        print('File: $image.jpg, Error: ${result.error}');
      }
    });
    

Extract XMP Data #

    var mapResult = MetaData.extractXMP(bytes);
    print(mapResult.toString());
    saveFile(image_name, mapResult);
    

Saving exif content into File #

      void saveFile(String fileName, dynamic exifContent) {
          File('${path}$fileName.json').writeAsStringSync(jsonEncode(exifContent));
      }
    

Features coming in next version #

On-going implementation for future:

  • metadata of audio and video files
  • extracting file-types

Also checkout our other libraries:

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metadata helps to extract metadata from your files.

Repository (GitHub)
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Documentation

API reference

Uploader

kawal741536@gmail.com

License

MIT (LICENSE)

Dependencies

xmp

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Packages that depend on metadata