yt_downloader 0.1.0

Download YouTube videos with quality selection and automatic video+audio merging.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'package:yt_downloader/yt_downloader.dart';

void main() => runApp(const ExampleApp());

class ExampleApp extends StatelessWidget {
  const ExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(home: DownloadPage());
  }
}

class DownloadPage extends StatefulWidget {
  const DownloadPage({super.key});

  @override
  State<DownloadPage> createState() => _DownloadPageState();
}

class _DownloadPageState extends State<DownloadPage> {
  final _yt = YtDownloader();
  final _controller = TextEditingController(text: 'dQw4w9WgXcQ');
  VideoInfo? _info;
  double _progress = 0;
  String _status = '';

  Future<void> _fetchFormats() async {
    setState(() => _status = 'Fetching formats...');
    try {
      final info = await _yt.getInfo(_controller.text);
      setState(() {
        _info = info;
        _status = '${info.title}\n'
            '${info.formats.videoWithAudio.length} video+audio, '
            '${info.formats.videoOnly.length} video-only, '
            '${info.formats.audioOnly.length} audio-only';
      });
    } catch (e) {
      setState(() => _status = 'Error: $e');
    }
  }

  Future<void> _download(DownloadFormat format) async {
    final dir = await getApplicationDocumentsDirectory();
    final path = '${dir.path}/${_info!.videoId}.mp4';

    setState(() => _status = 'Downloading ${format.label}...');
    try {
      await _info!.download(
        format: format,
        outputPath: path,
        onProgress: (p) => setState(() => _progress = p),
      );
      setState(() => _status = 'Done! Saved to $path');
    } catch (e) {
      setState(() => _status = 'Error: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('yt_downloader example')),
      body: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            TextField(
              controller: _controller,
              decoration: const InputDecoration(
                labelText: 'Video ID or URL',
                border: OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 8),
            ElevatedButton(
              onPressed: _fetchFormats,
              child: const Text('Get Formats'),
            ),
            const SizedBox(height: 8),
            if (_progress > 0)
              LinearProgressIndicator(value: _progress),
            const SizedBox(height: 8),
            Text(_status),
            const SizedBox(height: 8),
            if (_info != null)
              Expanded(
                child: ListView(
                  children: [
                    for (final f in _info!.formats.videoWithAudio)
                      ListTile(
                        title: Text(f.label),
                        subtitle: Text(
                          '${f.needsMerge ? "Needs merge" : "Muxed"} '
                          '${f.estimatedSize > 0 ? "• ${(f.estimatedSize / 1024 / 1024).toStringAsFixed(1)} MB" : ""}',
                        ),
                        trailing: const Icon(Icons.download),
                        onTap: () => _download(f),
                      ),
                  ],
                ),
              ),
          ],
        ),
      ),
    );
  }
}