In this blog, we will learn how to Implement Easy Audio Trimmer In Flutter and Trim audio files using easy_audio_trimmer and save the trimmed audio files to the device.
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Introduction:-
An audio trimmer is essentially an audio editor designed to cut, trim, or split audio files.
It allows you to remove unwanted parts from your audio clips and save the resulting part of the audio in various audio file formats such as MP3, WAV, AAC, FLAC, OGG, and WMA.
Why is it needed:-
Audio trimmers serve a fundamental purpose: enabling users to cut and refine audio clips according to their preferences.
this functionality finds applications in various scenarios, including creating customised ringtones, editing, or simply extracting relevant portions from lengthy recordings.
Implementation:-
First we need to create a new flutter project and add the following dependencies in the pubspec.yaml file.
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dependencies: flutter: sdk: flutter easy_audio_trimmer: ^1.0.2+4 file_picker: ^6.1.1 |
Now, run the command “flutter pub get” to add the dependencies.
Add the following package to your class.
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import 'package:easy_audio_trimmer/easy_audio_trimmer.dart'; import 'package:file_picker/file_picker.dart'; |
First, we will create a button to pick the audio file.
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Center( child: ElevatedButton( style:ElevatedButton.styleFrom(backgroundColor:Colors.blue.shade50), onPressed: () async { FilePickerResult? result = await FilePicker.platform.pickFiles( type: FileType.audio, allowCompression: false, ); if (result != null) { File file = File(result.files.single.path!); Navigator.of(context).push( MaterialPageRoute(builder: (context) { return AudioTrimmerView(file); }), ); } }, child: const Text( "Select File", style: TextStyle(color: Colors.blue), )), ), |
Loading selected audio file:-
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void _loadAudio() async { setState(() { isLoading = true; }); await _trimmer.loadAudio(audioFile: widget.file); setState(() { isLoading = false; }); } |
Saving trimmed audio:-
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_saveAudio() { setState(() { _progressVisibility = true; }); _trimmer.saveTrimmedAudio( startValue: _startValue, endValue: _endValue, audioFileName: DateTime.now().millisecondsSinceEpoch.toString(), onSave: (outputPath) { setState(() { _progressVisibility = false; }); debugPrint('OUTPUT PATH: $outputPath'); }, ); } |
Audio playback status:-
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await _trimmer.audioPlaybackControl( startValue: _startValue, endValue: _endValue, ); |
Create an audio trimmer view:-
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TrimViewer( trimmer: _trimmer, viewerHeight: 100, viewerWidth: MediaQuery.of(context).size.width, durationStyle: DurationStyle.FORMAT_MM_SS, backgroundColor:Theme.of(context).primaryColor, barColor: Colors.white, durationTextStyle: TextStyle( color: Theme.of(context).primaryColor), allowAudioSelection: true, editorProperties: TrimEditorProperties( circleSize: 10, borderPaintColor: Colors.pink, borderWidth: 4, borderRadius: 5, circlePaintColor: Colors.pink.shade800, ), areaProperties: TrimAreaProperties.edgeBlur(blurEdges:true), onChangeStart: (value) => _startValue = value, onChangeEnd: (value) => _endValue = value, onChangePlaybackState: (value) { if (mounted) { setState(() => _isPlaying = value); } }, ), |
Complete code:-
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import 'dart:io'; import 'package:easy_audio_trimmer/easy_audio_trimmer.dart'; import 'package:file_picker/file_picker.dart'; import 'package:flutter/material.dart'; class AudioTrimmer extends StatefulWidget { const AudioTrimmer({super.key}); @override State<AudioTrimmer> createState() => _AudioTrimmerState(); } class _AudioTrimmerState extends State<AudioTrimmer> { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text( "Audio Trimmer", style: TextStyle(color: Colors.white), ), backgroundColor: Colors.blue, ), body: Center( child: ElevatedButton( style: ElevatedButton.styleFrom(backgroundColor: Colors.blue.shade50), onPressed: () async { FilePickerResult? result = awaiFilePicker.platform.pickFiles( type: FileType.audio, allowCompression: false, ); if (result != null) { File file = File(result.files.single.path!); Navigator.of(context).push( MaterialPageRoute(builder: (context) { return AudioTrimmerView(file); }), ); } }, child: const Text( "Select File", style: TextStyle(color: Colors.blue), )), ), ); } } class AudioTrimmerView extends StatefulWidget { final File file; const AudioTrimmerView(this.file, {Key? key}) : super(key: key); @override State<AudioTrimmerView> createState() => _AudioTrimmerViewState(); } class _AudioTrimmerViewState extends State<AudioTrimmerView> { final Trimmer _trimmer = Trimmer(); double _startValue = 0.0; double _endValue = 0.0; bool _isPlaying = false; bool _progressVisibility = false; bool isLoading = false; @override void initState() { super.initState(); _loadAudio(); } void _loadAudio() async { setState(() { isLoading = true; }); await _trimmer.loadAudio(audioFile: widget.file); setState(() { isLoading = false; }); } _saveAudio() { setState(() { _progressVisibility = true; }); _trimmer.saveTrimmedAudio( startValue: _startValue, endValue: _endValue, audioFileName: DateTime.now().millisecondsSinceEpoch.toString(), onSave: (outputPath) { setState(() { _progressVisibility = false; }); debugPrint('OUTPUT PATH: $outputPath'); }, ); } @override Widget build(BuildContext context) { return WillPopScope( onWillPop: () async { if (Navigator.of(context).userGestureInProgress) { return false; } else { return true; } }, child: Scaffold( backgroundColor: Colors.white, appBar: AppBar( leading: IconButton( icon: const Icon( Icons.arrow_back_ios, color: Colors.white, ), onPressed: () { Navigator.pop(context); }, ), title: const Text( "Audio Trimmer", style: TextStyle(color: Colors.white), ), backgroundColor: Colors.blue, ), body: isLoading ? const Center(child: CircularProgressIndicator()) : Center( child: Container( padding: const EdgeInsets.only(bottom: 30.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, mainAxisSize: MainAxisSize.max, children: <Widget>[ Center( child: Padding( padding: const EdgeInsets.all(8.0), child: TrimViewer( trimmer: _trimmer, viewerHeight: 100, viewerWidth: MediaQuery.of(context).size.width, durationStyle: DurationStyle.FORMAT_MM_SS, backgroundColor:Theme.of(context).primaryColor, barColor: Colors.white, durationTextStyle: TextStyle( color: Theme.of(context).primaryColor), allowAudioSelection: true, editorProperties: TrimEditorProperties( circleSize: 10, borderPaintColor: Colors.pink, borderWidth: 4, borderRadius: 5, circlePaintColor: Colors.pink.shade800, ), areaProperties: TrimAreaProperties.edgeBlur(blurEdges:true), onChangeStart: (value) => _startValue = value, onChangeEnd: (value) => _endValue = value, onChangePlaybackState: (value) { if (mounted) { setState(() => _isPlaying = value); } }, ), ), ), TextButton( child: _isPlaying ? Icon( Icons.pause, size: 80.0, color: Theme.of(context).primaryColor, ) : Icon( Icons.play_arrow, size: 80.0, color: Theme.of(context).primaryColor, ), onPressed: () async { bool playbackState = await _trimmer.audioPlaybackControl( startValue: _startValue, endValue: _endValue, ); setState(() => _isPlaying = playbackState); }, ), Visibility( visible: _progressVisibility, child: LinearProgressIndicator( backgroundColor: Theme.of(context).primaryColor.withOpacity(0.5), ), ), ElevatedButton( onPressed: _progressVisibility ? null : () =>_saveAudio(), child: const Text("SAVE"), ), ], ), ), ), ), ); } } |
Output:-
As you can see in the output, we are picking an audio file, trimming, playing and saving it.
Easy Audio Trimmer
It allows you to remove unwanted parts from your audio clips and save the resulting part of the audio in various audio file formats such as MP3, WAV, AAC, FLAC, OGG, and WMA.
Conclusion:-
We have completed the implementation of how to create an audio trimmer in Flutter.
That’s it! You’ve successfully implemented easy audio trimmer in your Flutter app.
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Hope this blog helped you to better understand the implementation of Easy Audio Trimmer In Flutter.
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