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STUDIO SYSTEM
STUDIO SYSTEM
File: STUDIO_SYSTEM.md
Documentation Index
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# Studio System Documentation ## Overview The Studio system is a comprehensive audio editing platform built into CreatorContent.net that allows users to create, edit, and render podcast episodes with professional-grade audio processing capabilities. ## Features ### Core Functionality - **Project Management**: Create and manage audio editing projects - **Timeline Editing**: Multi-track timeline with drag-and-drop interface - **Audio Clips**: Create clips from source media files with precise time controls - **Effects Processing**: Apply professional audio effects including: - Normalization - Noise Gate - Compression - Equalization - Reverb - **Audio Rendering**: Export projects to various formats (MP3, WAV, M4A, FLAC) - **Background Processing**: Audio rendering happens in the background using job queues ### Technical Capabilities - **FFmpeg Integration**: Uses FFmpeg for all audio processing - **Multi-track Mixing**: Support for multiple audio tracks - **Real-time Preview**: Playback controls for project preview - **Format Conversion**: Convert between various audio formats - **Quality Control**: Multiple quality settings for output ## Database Design ### Hybrid Approach (Recommended) The system uses a hybrid database design that combines the best aspects of project-based and session-based approaches: #### Core Tables 1. **studio_projects**: Main project container 2. **studio_project_assets**: Source media and clips 3. **studio_project_clips**: Time segments from source media 4. **studio_project_timeline**: Track layout and arrangement 5. **studio_project_outputs**: Rendered audio files #### Key Features - **JSON Storage**: Project state stored as JSON for flexibility - **Relational Links**: Proper foreign key relationships for data integrity - **Performance Indexes**: Optimized queries for large projects - **Soft Deletes**: Support for project archiving ## Audio Processing ### Supported Effects #### Normalization - **Purpose**: Standardize audio levels - **Parameters**: Target level (-20 to 0 dB) - **FFmpeg Filter**: `loudnorm` #### Noise Gate - **Purpose**: Remove background noise - **Parameters**: Threshold, ratio, attack, release - **FFmpeg Filter**: `agate` #### Compression - **Purpose**: Control dynamic range - **Parameters**: Threshold, ratio, attack, release, knee - **FFmpeg Filter**: `acompressor` #### Equalization - **Purpose**: Adjust frequency response - **Parameters**: Multiple frequency bands with gain and Q - **FFmpeg Filter**: `equalizer` #### Reverb - **Purpose**: Add spatial effects - **Parameters**: Room size, damping, wet/dry levels - **FFmpeg Filter**: `aecho` ### Audio Formats - **Input**: MP3, WAV, M4A, FLAC, OGG - **Output**: MP3, WAV, M4A, FLAC - **Quality Settings**: Low (128k), Medium (192k), High (320k) ## User Interface ### Main Components 1. **Media Browser**: Import and manage source audio files 2. **Timeline**: Multi-track editing interface 3. **Effects Panel**: Configure audio effects 4. **Transport Controls**: Playback and navigation 5. **Render Panel**: Export settings and progress ### Workflow 1. **Create Project**: Set up new editing session 2. **Import Media**: Add source audio files 3. **Create Clips**: Define time segments from source media 4. **Arrange Timeline**: Drag clips to tracks 5. **Apply Effects**: Configure audio processing 6. **Preview**: Test the mix 7. **Render**: Export final audio ## Technical Implementation ### Backend Services - **AudioProcessingService**: Core audio processing logic - **RenderAudioJob**: Background rendering job - **StudioController**: API endpoints for frontend ### Frontend Components - **Timeline Interface**: Drag-and-drop track editor - **Media Browser**: File management interface - **Effects Panel**: Real-time effect configuration - **Transport Controls**: Playback interface ### File Management - **Storage**: Files stored in Laravel storage system - **Temporary Processing**: Local temp directories for processing - **Cleanup**: Automatic cleanup of temporary files - **Backup**: Project state saved as JSON ## Installation Requirements ### System Dependencies ```bash # FFmpeg (required for audio processing) sudo apt-get install ffmpeg # PHP extensions sudo apt-get install php-ffmpeg # Queue worker (for background processing) php artisan queue:work ``` ### Laravel Configuration ```bash # Run migrations php artisan migrate # Set up queue driver (Redis recommended) QUEUE_CONNECTION=redis # Configure storage php artisan storage:link ``` ## API Endpoints ### Projects - `GET /api/studio/projects` - List user projects - `POST /api/studio/projects` - Create new project - `GET /api/studio/projects/{id}` - Get project details - `PUT /api/studio/projects/{id}` - Update project - `DELETE /api/studio/projects/{id}` - Delete project ### Assets - `POST /api/studio/projects/{id}/assets` - Add media asset - `POST /api/studio/projects/{id}/clips` - Create clip ### Timeline - `PUT /api/studio/projects/{id}/timeline` - Update timeline ### Rendering - `POST /api/studio/projects/{id}/render` - Start rendering - `GET /api/studio/media` - Get user media files ## Usage Examples ### Creating a Project ```javascript const project = await apiCall('/api/studio/projects', { method: 'POST', body: JSON.stringify({ name: 'My Podcast Episode', description: 'Episode 1 - Introduction', sample_rate: '44100', bit_depth: '16' }) }); ``` ### Adding Media Asset ```javascript const asset = await apiCall(`/api/studio/projects/${projectId}/assets`, { method: 'POST', body: JSON.stringify({ media_id: 123, asset_type: 'source', name: 'Interview Audio', metadata: { duration: 1800, format: 'mp3' } }) }); ``` ### Creating a Clip ```javascript const clip = await apiCall(`/api/studio/projects/${projectId}/clips`, { method: 'POST', body: JSON.stringify({ source_asset_id: assetId, name: 'Introduction', start_time: 0, end_time: 300 }) }); ``` ### Rendering Project ```javascript const render = await apiCall(`/api/studio/projects/${projectId}/render`, { method: 'POST', body: JSON.stringify({ format: 'mp3', quality: 'high', name: 'Final Episode' }) }); ``` ## Best Practices ### Performance - Use background jobs for rendering - Implement proper cleanup of temporary files - Optimize database queries with indexes - Cache frequently accessed project data ### User Experience - Provide real-time feedback during processing - Implement auto-save functionality - Show progress indicators for long operations - Offer keyboard shortcuts for common actions ### Audio Quality - Use appropriate bitrates for different quality levels - Implement proper error handling for failed processing - Validate audio files before processing - Provide audio preview capabilities ## Troubleshooting ### Common Issues 1. **FFmpeg not found**: Install FFmpeg and ensure it's in PATH 2. **Queue jobs not processing**: Check queue worker is running 3. **Storage permissions**: Ensure storage directory is writable 4. **Memory limits**: Increase PHP memory limit for large files ### Debugging - Check Laravel logs for processing errors - Monitor queue job status - Verify file permissions and paths - Test FFmpeg commands manually ## Future Enhancements ### Planned Features - **Real-time Collaboration**: Multi-user editing - **Plugin System**: Third-party effect plugins - **Advanced Effects**: More sophisticated audio processing - **Video Support**: Basic video editing capabilities - **Cloud Rendering**: Distributed processing ### Technical Improvements - **WebAssembly**: Client-side audio processing - **WebRTC**: Real-time audio streaming - **Machine Learning**: AI-powered audio enhancement - **Blockchain**: Decentralized project storage
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