[video_player] Add audio track metadata support (bitrate, sample rate, channels, codec) #9782
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| import 'package:flutter/material.dart'; | ||
| import 'package:video_player/video_player.dart'; | ||
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| /// Demo page showing how to retrieve and display available audio tracks | ||
| class AudioTracksDemo extends StatefulWidget { | ||
| const AudioTracksDemo({super.key}); | ||
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| @override | ||
| State<AudioTracksDemo> createState() => _AudioTracksDemoState(); | ||
| } | ||
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| class _AudioTracksDemoState extends State<AudioTracksDemo> { | ||
| VideoPlayerController? _controller; | ||
| List<VideoAudioTrack> _audioTracks = []; | ||
| bool _isLoading = false; | ||
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| @override | ||
| void initState() { | ||
| super.initState(); | ||
| _initializeVideoPlayer(); | ||
| } | ||
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| Future<void> _initializeVideoPlayer() async { | ||
| // Example URL with multiple audio tracks (replace with your test video) | ||
| const String videoUrl = | ||
| 'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4'; | ||
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| _controller = VideoPlayerController.networkUrl(Uri.parse(videoUrl)); | ||
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| try { | ||
| await _controller!.initialize(); | ||
| setState(() {}); | ||
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| // Get audio tracks after initialization | ||
| await _getAudioTracks(); | ||
| } catch (e) { | ||
| debugPrint('Error initializing video player: $e'); | ||
| } | ||
| } | ||
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| Future<void> _getAudioTracks() async { | ||
| if (_controller == null) return; | ||
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| setState(() { | ||
| _isLoading = true; | ||
| }); | ||
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| try { | ||
| final tracks = await _controller!.getAudioTracks(); | ||
| setState(() { | ||
| _audioTracks = tracks; | ||
| _isLoading = false; | ||
| }); | ||
| } catch (e) { | ||
| debugPrint('Error getting audio tracks: $e'); | ||
| setState(() { | ||
| _isLoading = false; | ||
| }); | ||
| } | ||
| } | ||
|
There was a problem hiding this comment. The |
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| @override | ||
| void dispose() { | ||
| _controller?.dispose(); | ||
| super.dispose(); | ||
| } | ||
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| @override | ||
| Widget build(BuildContext context) { | ||
| return Scaffold( | ||
| appBar: AppBar( | ||
| title: const Text('Audio Tracks Demo'), | ||
| backgroundColor: Colors.blue, | ||
| ), | ||
| body: Column( | ||
| children: [ | ||
| // Video Player | ||
| if (_controller != null && _controller!.value.isInitialized) | ||
| AspectRatio( | ||
| aspectRatio: _controller!.value.aspectRatio, | ||
| child: VideoPlayer(_controller!), | ||
| ) | ||
| else | ||
| const SizedBox( | ||
| height: 200, | ||
| child: Center( | ||
| child: CircularProgressIndicator(), | ||
| ), | ||
| ), | ||
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| // Video Controls | ||
| if (_controller != null && _controller!.value.isInitialized) | ||
| Row( | ||
| mainAxisAlignment: MainAxisAlignment.center, | ||
| children: [ | ||
| IconButton( | ||
| onPressed: () { | ||
| setState(() { | ||
| _controller!.value.isPlaying | ||
| ? _controller!.pause() | ||
| : _controller!.play(); | ||
| }); | ||
| }, | ||
| icon: Icon( | ||
| _controller!.value.isPlaying | ||
| ? Icons.pause | ||
| : Icons.play_arrow, | ||
| ), | ||
| ), | ||
| IconButton( | ||
| onPressed: _getAudioTracks, | ||
| icon: const Icon(Icons.refresh), | ||
| tooltip: 'Refresh Audio Tracks', | ||
| ), | ||
| ], | ||
| ), | ||
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| const Divider(), | ||
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| // Audio Tracks Section | ||
| Expanded( | ||
| child: Padding( | ||
| padding: const EdgeInsets.all(16.0), | ||
| child: Column( | ||
| crossAxisAlignment: CrossAxisAlignment.start, | ||
| children: [ | ||
| Row( | ||
| children: [ | ||
| const Text( | ||
| 'Available Audio Tracks:', | ||
| style: TextStyle( | ||
| fontSize: 18, | ||
| fontWeight: FontWeight.bold, | ||
| ), | ||
| ), | ||
| const Spacer(), | ||
| if (_isLoading) | ||
| const SizedBox( | ||
| width: 20, | ||
| height: 20, | ||
| child: CircularProgressIndicator(strokeWidth: 2), | ||
| ), | ||
| ], | ||
| ), | ||
| const SizedBox(height: 16), | ||
| if (_audioTracks.isEmpty && !_isLoading) | ||
| const Text( | ||
| 'No audio tracks found or video not initialized.', | ||
| style: TextStyle(color: Colors.grey), | ||
| ) | ||
| else | ||
| Expanded( | ||
| child: ListView.builder( | ||
| itemCount: _audioTracks.length, | ||
| itemBuilder: (context, index) { | ||
| final track = _audioTracks[index]; | ||
| return Card( | ||
| margin: const EdgeInsets.only(bottom: 8), | ||
| child: ListTile( | ||
| leading: CircleAvatar( | ||
| backgroundColor: track.isSelected | ||
| ? Colors.green | ||
| : Colors.grey, | ||
| child: Icon( | ||
| track.isSelected | ||
| ? Icons.check | ||
| : Icons.audiotrack, | ||
| color: Colors.white, | ||
| ), | ||
| ), | ||
| title: Text( | ||
| track.label, | ||
| style: TextStyle( | ||
| fontWeight: track.isSelected | ||
| ? FontWeight.bold | ||
| : FontWeight.normal, | ||
| ), | ||
| ), | ||
| subtitle: Column( | ||
| crossAxisAlignment: CrossAxisAlignment.start, | ||
| children: [ | ||
| Text('ID: ${track.id}'), | ||
| Text('Language: ${track.language}'), | ||
| ], | ||
| ), | ||
| trailing: track.isSelected | ||
| ? const Chip( | ||
| label: Text('Selected'), | ||
| backgroundColor: Colors.green, | ||
| labelStyle: | ||
| TextStyle(color: Colors.white), | ||
| ) | ||
| : null, | ||
| ), | ||
| ); | ||
| }, | ||
| ), | ||
| ), | ||
| ], | ||
| ), | ||
| ), | ||
| ), | ||
| ], | ||
| ), | ||
| ); | ||
| } | ||
| } | ||
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The example video URL points to
BigBuckBunny.mp4, which is unlikely to have multiple audio tracks. This makes the demo less effective at showcasing the new audio track selection feature. Consider using a test stream that is known to have multiple audio tracks, such as an HLS stream, to make the example more helpful for developers.For example, Apple provides test streams that could be used here: