175 lines
4.5 KiB
Markdown
175 lines
4.5 KiB
Markdown
# Features Documentation
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## Current Features
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### 1. YouTube Video Information Retrieval
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- Fetch video metadata without downloading
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- Display video title, thumbnail, and duration
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- View available formats
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**Implementation**: `app/api/info` endpoint
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### 2. Video Download
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- Download videos in multiple formats:
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- MP4 (most compatible)
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- WebM (web-optimized)
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- MKV (high quality)
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- AVI (legacy support)
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**Implementation**: `app/api/download` endpoint with `formatType: "video"`
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### 3. Audio Extraction
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- Extract audio from videos in multiple formats:
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- MP3 (most compatible, compressed)
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- WAV (uncompressed, high quality)
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- M4A (Apple format)
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- Opus (modern, efficient)
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**Implementation**: `app/api/download` endpoint with `formatType: "audio"`
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### 4. Format Transcoding
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- Automatic format conversion using yt-dlp and ffmpeg
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- Best quality selection for requested format
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- Audio extraction and conversion for audio formats
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**Implementation**: Server-side processing in `lib/youtube.ts`
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### 5. Modern UI
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- Responsive design with Tailwind CSS
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- shadcn/ui components for consistent styling
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- Loading states and error handling
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- Video thumbnail preview
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- Format selection dropdowns
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**Implementation**: `app/page.tsx` with shadcn/ui components
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### 6. URL Validation
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- Client-side and server-side URL validation
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- Support for various YouTube URL formats:
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- `https://www.youtube.com/watch?v=...`
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- `https://youtu.be/...`
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- `youtube.com/watch?v=...`
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**Implementation**: `lib/utils.ts` - `isValidYouTubeUrl()`
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### 7. Safe File Handling
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- Filename sanitization to prevent directory traversal
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- Unique file IDs to prevent conflicts
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- Proper file extension handling
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**Implementation**: `lib/youtube.ts` - `sanitizeFilename()`
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## Feature Roadmap
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### Planned Features
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#### Short Term
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- [ ] Download progress tracking
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- [ ] File size display before download
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- [ ] Video quality selection (720p, 1080p, etc.)
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- [ ] Download history
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- [ ] Error recovery and retry mechanism
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#### Medium Term
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- [ ] Playlist support
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- [ ] Batch downloads
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- [ ] Custom ffmpeg parameters
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- [ ] Download queue management
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- [ ] File cleanup automation
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#### Long Term
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- [ ] User authentication
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- [ ] Download quotas and limits
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- [ ] Cloud storage integration (S3, etc.)
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- [ ] API rate limiting
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- [ ] Webhook notifications
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- [ ] Mobile app support
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## Feature Usage Examples
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### Download MP4 Video
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```typescript
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const response = await fetch('/api/download', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({
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url: 'https://www.youtube.com/watch?v=...',
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format: 'mp4',
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formatType: 'video'
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})
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});
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```
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### Extract MP3 Audio
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```typescript
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const response = await fetch('/api/download', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({
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url: 'https://www.youtube.com/watch?v=...',
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format: 'mp3',
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formatType: 'audio'
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})
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});
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```
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### Get Video Info
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```typescript
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const response = await fetch('/api/info', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({
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url: 'https://www.youtube.com/watch?v=...'
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})
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});
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```
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## Feature Limitations
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### Current Limitations
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1. **No Progress Tracking**: Users cannot see download progress
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2. **No File Size Limits**: Large files may cause issues
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3. **No Cleanup**: Files accumulate in storage
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4. **Single Format**: One format per download request
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5. **No Playlist Support**: Only single videos
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6. **No Quality Selection**: Downloads best available quality
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7. **No Authentication**: No user accounts or history
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### Known Issues
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- Large files may timeout on slow connections
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- Some videos may not be available in requested format
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- Audio conversion (MP3/WAV) requires ffmpeg
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- No validation of available formats before download
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## Feature Dependencies
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### Required System Tools
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- **yt-dlp**: For video downloading and format selection
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- **ffmpeg**: For audio format conversion (MP3, WAV)
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### Required npm Packages
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- Next.js 16+
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- React 19+
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- shadcn/ui components
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- Tailwind CSS
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- Lucide React (icons)
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## Feature Testing
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### Manual Testing Checklist
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- [ ] Enter valid YouTube URL and get info
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- [ ] Download video in MP4 format
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- [ ] Download video in WebM format
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- [ ] Extract audio as MP3
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- [ ] Extract audio as WAV
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- [ ] Test with invalid URL (should show error)
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- [ ] Test with missing format (should show error)
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- [ ] Verify file downloads correctly
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- [ ] Check filename sanitization
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### Automated Testing (Future)
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- Unit tests for utility functions
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- Integration tests for API endpoints
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- E2E tests for user flows
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- Format validation tests
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