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Description:

metadata god

Metadata God #
A flutter plugin for retrieving and writing audio tags/metadata from audio files. It supports almost all kind of audio files
Supported Audio Formats #

File Format
Metadata Format

mp3
id3v2.4

m4a, mp4
MPEG-4 audio metadata

flac
Vorbis comment

Installation #
Run in terminal:
$ flutter pub add metadata_god
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Configuration #
Android #
For using metadata_god in Android it needs READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permissions
So, add following green highlighted lines to android/app/src/main/AndroidManifest.xml file:
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.example">

+ <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+ <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<application
android:label="Example"
android:name="${applicationName}"
android:icon="@mipmap/ic_launcher"
android:usesCleartextTraffic="true"
+ android:requestLegacyExternalStorage="true"
>
// .... rest of the file
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Finally, use packages like permission_handler to request storage permissions from user if not granted already
// before calling any method of MetadataGod in android
// check if storage permission is granted or not
// if not, request for permission
initState(){
final hasStorageAccess = Platform.isAndroid ? await Permission.storage.isGranted : true
if(!hasStorageAccess){
await Permission.storage.request();
if(!await Permission.storage.isGranted){
return;
}
}
// ... call all the metadata_god methods from here
}
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Following configuration would work with file path that are allowed explicitly by android. If you want entire storage access you'll need MANAGE_EXTERNAL_STORAGE permission and request the user to enable access to entire storage in app info settings.

Other platforms #
Linux, Windows and MacOS doesn't need any extra configuration and good to go after installation
Usage #
import 'package:flutter/material.dart';
import 'package:mime/mime.dart';
import 'package:metadata_god/metadata_god.dart';

// Initialize the plugin
void main(){
WidgetsFlutterBinding.ensureInitialized();
MetadataGod.initialize();
runApp(const MyApp());
}

// Get metadata from file
Metadata metadata = await MetadataGod.getMetadata("/path/to/audio-file");

// Set metadata to file
await MetadataGod.writeMetadata(
"/path/to/audio-file",
Metadata(
title: "Leave the Door Open",
artist: "Bruno Mars, Anderson .Paak, Silk Sonic",
album: "An Evening with Silk Sonic",
genre: "R&B, Soul",
year: 2021,
albumArtist: "Bruno Mars, Anderson .Paak",
trackNumber: 1,
trackTotal: 12,
discNumber: 1,
discTotal: 5,
durationMs: 248000,
fileSize: file.lengthSync(),
picture: Picture(
data: File("/path/to/cover-image").readAsBytesSync(),
mimeType: lookupMimeType("/path/to/cover-image"),
),
),
);
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Contributing #
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
License #
MIT
Author #
Kingkor Roy Tirtho