PixelProbe

PixelProbe is a comprehensive media file corruption detection tool with a modern web interface. It helps you identify and manage corrupted video, image, and audio files across your media libraries.

Version 2.2.7 - Critical scan engine fixes with enhanced performance, large file handling, and database improvements.

🚀 What's New in Version 2.2.7

🔧 Critical Scan Engine Fixes

• Database Constraints: Fixed StringDataRightTruncation and UniqueViolation errors that caused scan failures
• Large File Handling: Added 5GB file size limits and 5-minute timeouts to prevent indefinite hangs
• Chunk ID Uniqueness: Enhanced chunk ID generation with timestamps to prevent duplicate key conflicts
• Progress Messages: Increased VARCHAR limits from 200 to 1000 characters to prevent truncation errors
• Error Recovery: Improved scan thread crash recovery and status reporting
• Startup Reliability: Fixed app startup issues caused by database migration timing

🎯 Key Benefits

• No More Stuck Scans: Eliminates the "100% complete with pending files" issue
• Large File Support: Handles multi-GB video files without hanging
• Database Stability: Resolves PostgreSQL constraint violations that crashed scans
• Clean Restarts: Fresh database start recommended for optimal performance

🚀 What's New in Version 2.2.0

🗄️ PostgreSQL Database Migration

• Performance Boost: 10-50x faster database operations for large datasets
• Scalability: Better handling of massive media libraries
• Concurrency: Improved support for simultaneous operations
• Migration Tool: Automated migration from SQLite to PostgreSQL

🧠 Memory Leak Prevention

• Output Rotation: Configurable rotation prevents unbounded memory growth during long scans
• Smart Truncation: Keeps last 80% of output when size limits are reached
• Per-Scan Control: Output rotation can be enabled/disabled per scan

📅 Enhanced Scheduled Scans

• HTTP Self-Calls: Fixed Flask context issues that prevented scheduled scans
• Better Reliability: More robust execution of automated scans
• Improved Logging: Better error handling and reporting for scheduled operations

🔧 Configuration System

• Centralized Config: New configuration module with environment-based settings
• PostgreSQL-First: Optimized for PostgreSQL with connection pooling
• Backward Compatibility: Existing environment variables still supported

⚡ Performance Improvements

• Connection Pooling: 20 base connections with overflow up to 40
• Batch Processing: Optimized for large dataset operations
• Statement Timeout: 5-minute timeout for long-running queries

📦 Migration from v2.1.x to v2.2.0

Important: v2.2.0 requires PostgreSQL. SQLite is no longer supported.

Quick Migration Steps

1. Backup your data:

   cp /path/to/instance/pixelprobe.db /path/to/instance/pixelprobe.db.backup

2. Update Docker Compose - Add PostgreSQL and Redis services:

   services:
     postgres:
       image: postgres:15-alpine
       environment:
         POSTGRES_DB: pixelprobe
         POSTGRES_USER: pixelprobe
         POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
       volumes:
         - postgres_data:/var/lib/postgresql/data
   
     mediachecker:
       image: ttlequals0/pixelprobe:2.2.0
       environment:
         POSTGRES_HOST: postgres
         POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
         # ... other settings

3. Set required environment variables:

   export POSTGRES_PASSWORD=your-secure-password

4. Start PostgreSQL and migrate data:

   docker-compose up -d postgres
   sleep 15
   
   # Migrate existing SQLite data
   docker run --rm \
     --network pixelprobe_pixelprobe-network \
     -v "/path/to/instance/pixelprobe.db:/app/pixelprobe.db:ro" \
     -e POSTGRES_HOST=postgres \
     -e POSTGRES_PASSWORD=$POSTGRES_PASSWORD \
     ttlequals0/pixelprobe:2.2.0 \
     python migrate_to_postgres.py --sqlite-path /app/pixelprobe.db

5. Start the application:

   docker-compose up -d

For detailed migration instructions, see MIGRATION_v2.2.0.md.

⚠️ Migration Recommendation (v2.2.7+)

Starting Fresh Recommended: While migration from previous versions is supported, we recommend starting with a fresh database for v2.2.7+ due to significant scan engine improvements:

• Clean Start Benefits: Eliminates any corrupted scan states from previous database constraint issues
• Full Fix Coverage: Ensures all v2.2.7 scan improvements are active from the beginning
• No Legacy Issues: Avoids potential conflicts from old chunk IDs or stuck pending items

Fresh Start Procedure:

# Stop container and remove database volume
docker-compose down
docker volume rm pixelprobe_postgres_data

# Start fresh with v2.2.7+
docker-compose up -d

Migration Still Supported: If you have important scan history to preserve, the migration tools still work, but you may need to manually clean up any stuck scan states.

🎉 What's New in Version 2.1.0

This major release includes 80 versions worth of improvements since 2.0.53:

🔒 Security Enhancements

• Path Traversal Protection: Comprehensive validation prevents directory traversal attacks
• Command Injection Prevention: All subprocess calls now use validated safe wrappers
• Input Validation: JSON schema validation on all API endpoints
• Rate Limiting: Configurable limits on API endpoints (200/day, 50/hour default)
• CSRF Protection: Flask-WTF integration for enhanced security
• Audit Logging: Comprehensive security event logging

🏗️ Architecture Overhaul

• Modular Design: Separated 2,500+ line monolith into clean, maintainable modules
• Layered Architecture: Clear separation between API routes, business logic, and data access
• SOLID Principles: Each module has single, well-defined responsibility
• Repository Pattern: Clean data access layer with testable components
• Improved Testability: Components can be tested in isolation

📊 Scan Reports Feature

• Scan History: View all past scan operations with detailed statistics
• Advanced Filtering: Filter by scan type and status
• Export Options: Export reports as JSON or PDF
• Bulk Operations: Select and manage multiple reports
• Performance Metrics: Track scan duration and efficiency

🎵 Audio Format Support

• Comprehensive Coverage: MP3, FLAC, WAV, AAC, OGG, Opus, WMA, and more
• Lossless Formats: FLAC, AIFF, APE, WavPack with integrity checking
• High-Resolution: DSD formats (DSF, DFF) support
• Deep Scan Mode: Detect timestamp issues and packet errors
• Format-Specific Tests: FLAC CRC validation, MP3 frame validation

🎥 Enhanced Video Support

• HEVC/H.265: Full support including Main 10 profile detection
• Professional Formats: ProRes, DNxHD/DNxHR, MXF
• Broadcast Formats: AVCHD, MTS, M2TS
• Better Detection: Enhanced corruption detection for modern codecs

🖼️ Expanded Image Support

• Apple Formats: HEIC/HEIF support
• RAW Formats: Canon CR2/CR3, Nikon NEF, Sony ARW, Adobe DNG, and more
• Professional: PSD, OpenEXR, HDR, SVG
• Scientific: FITS, Netpbm formats

⚡ Performance Optimizations

• 3-5x Faster Discovery: Replaced os.walk() with os.scandir()
• 250x I/O Improvement: Increased hash chunk size from 4KB to 1MB
• Database Performance: Connection pooling and optimized SQLite pragmas
• Batch Processing: Process up to 100 items per transaction
• Progress Tracking: Real-time ETA calculations for all operations

🐛 Major Bug Fixes

• Fixed scan progress getting stuck at 0% or 67%
• Fixed rescan scanning entire directories instead of selected files
• Fixed UI filters and sorting not working properly
• Fixed database initialization issues after upgrades
• Fixed rate limiting blocking internal requests
• Fixed memory issues with 1M+ file databases
• Fixed timezone handling throughout the application
• Fixed PDF report generation and formatting

🎨 UI Improvements

• Bulk Operations: Enhanced bulk selection and actions
• Progress Display: Shows current file, phase, and ETA
• Export Options: Dropdown menu with CSV, JSON, PDF formats
• Dark Mode: Refined dark mode with better contrast
• Mobile Responsive: Improved mobile interface

🔧 Developer Experience

• Comprehensive Tests: 70+ tests covering all components
• API Documentation: OpenAPI/Swagger documentation
• Better Logging: Structured logging with proper levels
• Database Tools: Migration and repair utilities
• CI/CD Ready: Docker multi-stage builds

✨ Features

• 🎬 Comprehensive Media Support: Detects corruption in videos (MP4, MKV, AVI, MOV, etc.) and images (JPEG, PNG, GIF, etc.)
• 🔍 Advanced Detection: Uses FFmpeg, ImageMagick, and PIL for thorough corruption analysis
• ⚠️ Warning System: Differentiates between corrupted files and files with minor issues
• 🌐 Modern Web Interface: Clean, responsive dark/light mode UI for viewing and managing scan results
• 💾 Persistent Storage: SQLite database stores scan results across application restarts
• 📁 File Management: Download, view, mark as good, and manage files directly from the web interface
• 🐳 Docker Support: Easy deployment with Docker and docker-compose
• ⚙️ Configurable: Environment variable configuration for scan directories and behavior
• ⚡ Parallel Scanning: Multi-threaded scanning for improved performance with real-time progress
• 📊 System Statistics: Detailed system statistics with monitored paths and file tracking
• 🔄 Bulk Actions: Select multiple files for rescanning, deep scanning, or marking as good
• 📈 Phase-Based Progress: Clear scanning phases showing discovery, database addition, and scanning stages
• 📅 Scheduled Scanning: Automated scans with cron or interval-based scheduling
• 🚫 Path & Extension Exclusions: Configure paths and file types to exclude from scanning
• 🔍 Multiple Scan Types: Normal scan, orphan cleanup, and file changes detection

📸 Screenshots

Desktop Interface

Light Mode

The modern desktop interface features:

• Modern design with clean, professional aesthetics
• Sidebar navigation for easy access to all features
• Real-time statistics dashboard showing file health status
• Advanced filtering and search capabilities
• Bulk action support for managing multiple files

Dark Mode

PixelProbe includes a sophisticated dark mode:

• High contrast design optimized for low-light environments
• Consistent color scheme across all UI elements
• Smooth theme transitions
• Automatic theme persistence

Mobile Interface

The mobile interface is fully responsive and touch-optimized:

• Adaptive layout that works on all screen sizes
• Touch-friendly buttons and controls
• Collapsible sidebar navigation
• Card-based design for scan results on mobile

Feature Highlights

System Statistics Modal

Comprehensive system overview showing:

• Database statistics with file counts by status
• Monitored paths with accessibility status
• Scan performance metrics
• File system completion percentages

Scan Output Details

Detailed scan results viewer:

• Shows specific corruption or warning details
• Displays which tool detected the issue
• Provides full scan output for debugging

Advanced Features

Scan Reports

Comprehensive scan reporting with history and analytics:

• View all past scan operations with detailed statistics
• Filter by scan type (full scan, rescan, deep scan, cleanup, file changes)
• See duration, files processed, and issues found for each scan
• Export reports as JSON for data analysis or PDF for documentation
• Bulk actions: refresh or delete multiple reports at once
• Actions include viewing details, exporting JSON/PDF, and deleting reports

Scheduled Scanning

Create and manage automated scan schedules:

• Support for both cron expressions and simple intervals
• Multiple scan types: Normal Scan, Orphan Cleanup, File Changes
• View next run times and last execution status
• Enable/disable schedules with a single click

Flexible scheduling options:

• Name your schedules for easy identification
• Choose between cron expressions for advanced users or simple intervals
• Select scan type to automate different maintenance tasks
• Optionally specify custom scan paths

Exclusion Management

Interactive exclusion management with modern UI:

• Add exclusions individually with dedicated input fields
• Remove specific exclusions with one-click delete buttons
• See all exclusions at a glance in a clean list format
• Press Enter to quickly add new exclusions
• Separate management for paths and file extensions
• Real-time updates with no page refresh needed

🚀 Quick Start

Using Docker (Recommended)

1. Clone the repository:

   git clone https://github.com/ttlequals0/PixelProbe.git
   cd PixelProbe

2. Configure environment variables:

   cp .env.example .env

   Edit .env and set required variables:

   # Generate a secure secret key
   python -c "import secrets; print(secrets.token_hex(32))"
   
   # Edit .env file with your values
   SECRET_KEY=your-generated-secret-key-here
   MEDIA_PATH=/path/to/your/actual/media/directory
   SCAN_PATHS=/media

3. Start the application:

   docker-compose up -d

4. Access the web interface: Open http://localhost:5001 in your browser

5. Start scanning: Click "Scan All Files" to begin analyzing your media library

Docker Image Versions

PixelProbe is available on Docker Hub as ttlequals0/pixelprobe. Check the Docker Hub page for all available versions.

Current stable versions:

• ttlequals0/pixelprobe:latest - Latest stable release (v2.1.0)
• ttlequals0/pixelprobe:2.1.0 - Major milestone with 80+ improvements

You can specify a specific version in your docker-compose.yml:

services:
  pixelprobe:
    image: ttlequals0/pixelprobe:2.1.0  # or :latest for newest

Development Setup

1. Clone the repository:

   git clone https://github.com/ttlequals0/PixelProbe.git
   cd PixelProbe

2. Use development compose file:

   docker-compose -f docker-compose.dev.yml up -d

Manual Installation

1. Install dependencies:

   # System dependencies
   sudo apt-get update
   sudo apt-get install ffmpeg imagemagick libmagic1
   
   # Python dependencies
   pip install -r requirements.txt

2. Configure environment:

   cp .env.example .env
   # Edit .env with your settings

3. Run the application:

   python app.py

Configuration

Environment Variables

PixelProbe uses environment variables for all configuration. Copy .env.example to .env and customize:

cp .env.example .env

Required Variables:

• SECRET_KEY - Secure secret key for Flask sessions (generate with: python -c "import secrets; print(secrets.token_hex(32))")
• MEDIA_PATH - Host path to your media files (for Docker volume mounting)

Optional Variables:

• DATABASE_URL - Database connection string (default: SQLite)
• SCAN_PATHS - Comma-separated directories to monitor inside container (default: /media)
• TZ - Timezone (default: UTC)
• MAX_FILES_TO_SCAN - Performance limit (default: 100)
• MAX_SCAN_WORKERS - Parallel scanning threads (default: 4)
• PERIODIC_SCAN_SCHEDULE - Automated scanning schedule
• CLEANUP_SCHEDULE - Automated cleanup schedule
• EXCLUDED_PATHS - Paths to ignore during scanning
• EXCLUDED_EXTENSIONS - File extensions to ignore

See .env.example for complete configuration options with examples.

Docker Configuration

The docker-compose.yml is fully configured to use environment variables from your .env file:

services:
  pixelprobe:
    image: ttlequals0/pixelprobe:2.0.132  # Specify version
    environment:
      - SCAN_PATHS=/media
      - DATABASE_URL=sqlite:///media_checker.db
    volumes:
      - ${MEDIA_PATH}:/media

Recommended: Always specify a version tag instead of using :latest to ensure consistent deployments.

Multiple Scan Paths

You can configure multiple directories to scan:

Method 1: Docker Compose with Multiple Volumes

environment:
  - SCAN_PATHS=/movies,/tv-shows,/backup
volumes:
  - /mnt/movies:/movies
  - /mnt/tv-shows:/tv-shows  
  - /mnt/backup:/backup

Method 2: Single Volume with Subdirectories

export MEDIA_PATH=/mnt/all-media  # Contains subdirs: movies/, tv/, backup/
# docker-compose.yml uses: SCAN_PATHS=/media/movies,/media/tv,/media/backup

For Docker: Set the MEDIA_PATH environment variable for volume mounting:

export MEDIA_PATH=/path/to/your/actual/media
docker-compose up -d

Usage

Web Interface

1. Access the Dashboard: Navigate to http://localhost:5001
2. Start a Scan: Click "Scan All Files" to begin scanning your media directories
3. View Results: Results appear in the table below with corruption status
4. Filter Results: Use the filter buttons to show only corrupted or healthy files
5. File Actions:
   • Rescan: Re-examine a specific file
   • Download: Download the file to your local machine
6. Schedules: Manage automated scan schedules with multiple scan types (v2.0.44+)
   • Create schedules for normal scans, orphan cleanup, or file changes detection
   • Use cron expressions or simple intervals
   • Enable/disable schedules on demand
7. Exclusions: Interactive management of paths and extensions to exclude (v2.0.44+)
   • Add exclusions individually with dedicated input fields
   • Remove specific exclusions with one click
   • Press Enter to quickly add new exclusions

API Endpoints

The application provides REST API endpoints:

• GET /api/stats - Get scanning statistics
• GET /api/scan-results - Get paginated scan results
• POST /api/scan-all - Start a full scan of all configured directories
• POST /api/scan-file - Scan a specific file
• GET /api/download/<id> - Download a file
• GET /api/schedules - List all scan schedules (v2.0.41+)
• POST /api/schedules - Create a new scan schedule (v2.0.41+)
• PUT /api/schedules/<id> - Update a scan schedule (v2.0.41+)
• DELETE /api/schedules/<id> - Delete a scan schedule (v2.0.41+)
• GET /api/exclusions - Get current exclusions (v2.0.41+)
• PUT /api/exclusions - Update exclusions (v2.0.41+)
• POST /api/exclusions/<type>/<item> - Add individual exclusion (v2.0.44+)
• DELETE /api/exclusions/<type>/<item> - Remove individual exclusion (v2.0.44+)

Command Line Usage

You can also use the PixelProbe class directly in Python:

from media_checker import PixelProbe

checker = PixelProbe()

# Scan a single file
result = checker.scan_file('/path/to/media/file.mp4')
print(f"Corrupted: {result['is_corrupted']}")

# Scan multiple directories
results = checker.scan_directories(['/path/to/media1', '/path/to/media2'])
for result in results:
    if result['is_corrupted']:
        print(f"Corrupted file: {result['file_path']}")

Corruption Detection

PixelProbe uses multiple methods to detect file corruption:

Video Files

• FFmpeg Analysis: Deep analysis of video streams and metadata
• Frame Validation: Attempts to decode video frames to detect corruption
• Quick Scan: Fast check of first 10 seconds for immediate feedback
• Stream Validation: Verifies video and audio stream integrity
• HEVC/ProRes Support: Specialized detection for modern codecs

Image Files

• PIL Verification: Uses Python Imaging Library for basic corruption detection
• ImageMagick: Advanced image analysis and validation
• Dimension Checks: Validates image dimensions and properties
• Format Validation: Ensures files match their declared format
• RAW/HEIC Support: Handles camera RAW files and Apple's HEIC format

Audio Files

• FFmpeg Audio Analysis: Comprehensive audio stream validation
• Decode Testing: Attempts to decode audio to detect corruption
• Header Validation: Checks for missing or corrupted headers
• Format-Specific Tests:
  • FLAC: CRC validation and built-in integrity checking
  • MP3: Frame header validation
  • Lossless formats: Bit-perfect verification
• Deep Scan Mode: Full file analysis for timestamp and packet errors

Detection Accuracy

• High Confidence: 100% detection of files with broken headers, truncated files, and I/O errors
• Moderate Confidence: ~85% detection of random corruption patterns
• Low Confidence: ~50% detection of zero-byte overwrites

Supported File Formats

Video Formats

• Common: MP4, MKV, AVI, MOV, WMV, FLV, WebM, M4V
• HEVC/H.265: HEVC, H265
• Professional: ProRes, MXF, DNxHD, DNxHR
• Broadcast: MTS, M2TS, AVCHD
• Legacy: MPG, MPEG, VOB, RM, RMVB
• Other: 3GP, 3G2, F4V, F4P, OGV, ASF, AMV, M2V, SVI

Image Formats

• Common: JPEG, PNG, GIF, BMP, TIFF, WebP
• Apple: HEIC, HEIF
• RAW Formats:
  • Canon: CR2, CR3
  • Nikon: NEF, NRW
  • Sony: ARW, SRF, SR2
  • Adobe: DNG
  • Others: ORF (Olympus), RW2 (Panasonic), PEF/PTX (Pentax), RAF (Fujifilm), X3F (Sigma), DCR/KDC (Kodak), MOS (Leaf)
• Professional: PSD, EXR, HDR, SVG
• Other: ICO, PBM, PGM, PPM, PNM, FITS

Audio Formats (NEW!)

• Lossy: MP3, AAC, M4A, WMA, OGG, OGA, Opus, AMR
• Lossless: FLAC, WAV, AIFF, APE, WV (WavPack), TTA, CAF
• Uncompressed: WAV, AIFF, AU, SND, VOC
• High-Resolution: DSF, DFF (DSD)
• Dolby/DTS: AC3, DTS
• Container: MKA (Matroska Audio), M4B (Audiobook)
• Legacy: RA, RAM (RealAudio), GSM, MIDI

Performance Considerations

• Scan Duration: Video scanning can take 2-20 minutes per file depending on size
• Resource Usage: CPU-intensive during scanning (80-100% utilization)
• Memory Usage: Minimal memory footprint, processes files individually
• Disk I/O: Sequential read access to media files

Architecture

Modular Architecture (v2.0.55+)

PixelProbe now features a clean, modular architecture following SOLID principles:

PixelProbe/
├── app.py                    # Application initialization (250 lines vs 2,500+)
├── pixelprobe/              # Main package
│   ├── api/                 # API Route Blueprints
│   │   ├── scan_routes.py   # Scan endpoints (/api/scan-*)
│   │   ├── stats_routes.py  # Statistics endpoints (/api/stats, /api/system-info)
│   │   ├── admin_routes.py  # Admin endpoints (configurations, schedules)
│   │   ├── export_routes.py # Export endpoints (CSV, view, download)
│   │   └── maintenance_routes.py # Cleanup and file-changes operations
│   ├── services/            # Business Logic Layer
│   │   ├── scan_service.py  # Scanning operations and orchestration
│   │   ├── stats_service.py # Statistics calculations
│   │   ├── export_service.py # Export functionality
│   │   └── maintenance_service.py # Cleanup and monitoring
│   ├── repositories/        # Data Access Layer
│   │   ├── base_repository.py # Generic repository pattern
│   │   ├── scan_repository.py # Scan result data operations
│   │   └── config_repository.py # Configuration data operations
│   └── utils/               # Shared Utilities
│       ├── helpers.py       # Common helper functions
│       ├── decorators.py    # Route decorators
│       └── validators.py    # Input validation
├── tests/                   # Comprehensive Test Suite
│   ├── conftest.py         # Pytest configuration and fixtures
│   ├── test_media_checker.py # Core functionality tests
│   ├── unit/               # Unit tests for each component
│   │   ├── test_scan_service.py
│   │   ├── test_stats_service.py
│   │   └── test_repositories.py
│   └── integration/        # API integration tests
├── media_checker.py        # Core corruption detection engine
├── models.py              # SQLAlchemy database models
├── static/                # Frontend assets
├── templates/             # HTML templates
└── requirements.txt       # Python dependencies

Key Architectural Benefits

• Separation of Concerns: Each module has a single, well-defined responsibility
• Testability: Components can be tested in isolation with comprehensive test coverage
• Maintainability: Changes to one feature don't affect others
• Scalability: Easy to add new features without modifying existing code
• API Compatibility: All endpoints remain unchanged, ensuring backward compatibility

🛠️ Utility Tools

The tools/ directory contains utility scripts for database maintenance and migration tasks. These are useful for:

• Fixing false positives from older versions
• Adding new database columns
• Resetting files for rescanning with updated logic

See tools/README.md for detailed documentation on each tool.

Documentation

API Documentation

• API Reference - Complete API documentation with endpoints, request/response examples
• OpenAPI Specification - OpenAPI 3.0 specification for API integration
• Integration Guide - Examples for integrating PixelProbe into your workflows

Developer Documentation

• Developer Guide - Setup, architecture, and contribution guidelines
• Architecture Overview - System design and component architecture
• Project Structure - Detailed code organization and module descriptions
• Performance Tuning - Optimization guide for large-scale deployments

API Client Examples

• Python Client - Full-featured Python client with CLI
• Node.js Client - JavaScript/Node.js client implementation
• Bash Client - Shell script client using curl and jq

Quick Start Examples

Python

from pixelprobe_client import PixelProbeClient

client = PixelProbeClient("http://localhost:5000")
client.scan_directory(["/media/photos"])
stats = client.get_statistics()
print(f"Corruption rate: {stats['corruption_rate']}%")

JavaScript

const PixelProbeClient = require('./pixelprobe-client');

const client = new PixelProbeClient('http://localhost:5000');
await client.scanDirectory(['/media/photos']);
const stats = await client.getStatistics();
console.log(`Corruption rate: ${stats.corruption_rate}%`);

Bash

# Scan directories
./pixelprobe-client.sh scan /media/photos /media/videos

# Get statistics
./pixelprobe-client.sh stats

# Export results
./pixelprobe-client.sh export results.csv

Development

Running in Development Mode

export FLASK_ENV=development
python app.py

Testing

PixelProbe includes a comprehensive test suite covering core functionality, services, repositories, and API endpoints.

Running Tests

# Install test dependencies
pip install -r requirements-test.txt

# Run all tests
pytest

# Run with coverage report
pytest --cov=pixelprobe --cov-report=html

# Run specific test categories
pytest tests/unit/           # Unit tests only
pytest tests/integration/    # Integration tests only
pytest tests/test_media_checker.py  # Core functionality tests

# Run with verbose output
pytest -v

# Run with benchmark tests
pytest --benchmark-only

Test Categories

• Unit Tests: Test individual components in isolation

  • Service layer tests (scan, stats, export, maintenance)
  • Repository layer tests (data access patterns)
  • Utility function tests

• Integration Tests: Test API endpoints and full workflows

  • API endpoint tests with mock data
  • Database integration tests
  • File system operation tests

• Performance Tests: Benchmark critical operations

  • File scanning performance
  • Database query optimization
  • Memory usage monitoring

Writing Tests

When contributing, please include tests for new functionality:

# Example test for new feature
def test_new_feature(scan_service, mock_scan_result):
    result = scan_service.new_feature(mock_scan_result)
    assert result.status == 'success'

Adding New File Formats

To add support for new file formats:

1. Update supported_formats in PixelProbe.__init__()
2. Add detection logic in _check_*_corruption() methods
3. Update the documentation

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request

Troubleshooting

Common Issues

FFmpeg/ImageMagick not found:

• Ensure FFmpeg and ImageMagick are installed and in PATH
• On Ubuntu/Debian: sudo apt-get install ffmpeg imagemagick
• On macOS: brew install ffmpeg imagemagick

Permission errors:

• Ensure the application has read access to your media directories
• Check file permissions and ownership

Database errors:

• Delete the database file to reset: rm media_checker.db
• Ensure write permissions in the application directory

Memory issues with large files:

• The application processes files individually to minimize memory usage
• For very large files, consider increasing system swap space

Logs and Debugging

Enable debug logging by setting FLASK_ENV=development in your .env file.

🛠️ Troubleshooting

Database Errors After Version Updates

If you encounter "no such table: scan_results" errors after upgrading PixelProbe, this indicates the database schema wasn't properly initialized. This typically happens during version upgrades when the container restarts.

Quick Fix:

# Run the database schema fix tool
docker exec pixelprobe python tools/fix_database_schema.py

What this does:

• Creates all missing database tables
• Runs necessary schema migrations
• Creates performance indexes
• Verifies database accessibility

Alternative one-liner:

docker exec pixelprobe python -c "
from models import db; from app import app; 
ctx = app.app_context(); ctx.push(); 
db.create_all(); 
print('✅ Database tables created'); 
ctx.pop()
"

Note: New installations should not experience this issue - it's specific to existing installations being upgraded.

Rate Limiting Issues (429 Errors)

If you see 429 "Too Many Requests" errors in browser console, this has been fixed in version 2.0.72+. Upgrade to the latest version:

# Update to latest version
docker-compose pull
docker-compose up -d

Container Won't Start

If the container fails to start, check:

1. SECRET_KEY is set in your compose file
2. Volume mounts exist on the host system
3. Port 5001 is available (or change the port mapping)

Web Interface Not Loading

1. Check container health: docker ps (should show "healthy")
2. Verify port mapping: Ensure 5001:5000 matches your setup
3. Check logs: docker logs pixelprobe

Performance Issues

For large media libraries:

• Increase MAX_SCAN_WORKERS (default: 4, try 8-16 for powerful systems)
• Monitor system resources during scanning
• Use SSD storage for the database if possible

Getting Help

1. Check logs first: docker logs pixelprobe
2. Try database fix: Run the schema fix tool above
3. Search existing issues: GitHub Issues
4. Create new issue: Include logs and system info

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• FFmpeg for video analysis
• ImageMagick for image processing
• PIL/Pillow for Python image handling
• Inspired by check-media-integrity
• Reference implementations from broken-video-file-detector and CorruptVideoFileInspector

Support

For issues, questions, or contributions, please visit the GitHub repository.