vogel-video-analyzer 0.1.4

YOLOv8-based video analysis tool for bird content detection

🐦 Vogel Video Analyzer

Languages: 🇬🇧 English | 🇩🇪 Deutsch

YOLOv8-based video analysis tool for automated bird content detection and quantification.

A powerful command-line tool and Python library for analyzing videos to detect and quantify bird presence using state-of-the-art YOLOv8 object detection.

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✨ Features

• 🤖 YOLOv8-powered Detection - Accurate bird detection using pre-trained models
• 📊 Detailed Statistics - Frame-by-frame analysis with bird content percentage
• 🎯 Segment Detection - Identifies continuous time periods with bird presence
• ⚡ Performance Optimized - Configurable sample rate for faster processing
• 📄 JSON Export - Structured reports for archival and further analysis
• 🗑️ Smart Auto-Delete - Remove video files or folders without bird content
• 📝 Logging Support - Structured logs for batch processing workflows
• 🐍 Library & CLI - Use as standalone tool or integrate into your Python projects

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🚀 Quick Start

Installation

Recommended: Using Virtual Environment

# Install venv if needed (Debian/Ubuntu)
sudo apt install python3-venv

# Create virtual environment
python3 -m venv ~/venv-vogel

# Activate it
source ~/venv-vogel/bin/activate  # On Windows: ~/venv-vogel\Scripts\activate

# Install package
pip install vogel-video-analyzer

Direct Installation

pip install vogel-video-analyzer

Basic Usage

# Analyze a single video
vogel-analyze video.mp4

# Faster analysis (every 5th frame)
vogel-analyze --sample-rate 5 video.mp4

# Export to JSON
vogel-analyze --output report.json video.mp4

# Delete only video files with 0% bird content
vogel-analyze --delete-file *.mp4

# Delete entire folders with 0% bird content  
vogel-analyze --delete-folder ~/Videos/*/*.mp4

# Batch process directory
vogel-analyze ~/Videos/Birds/**/*.mp4

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📖 Usage Examples

Command Line Interface

Basic Analysis

# Analyze single video with default settings
vogel-analyze bird_video.mp4

Output:

🎬 Video Analysis Report
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📁 File: /path/to/bird_video.mp4
📊 Total Frames: 450 (analyzed: 90)
⏱️  Duration: 15.0 seconds
🐦 Bird Frames: 72 (80.0%)
🎯 Bird Segments: 2

📍 Detected Segments:
  ┌ Segment 1: 00:00:02 - 00:00:08 (72% bird frames)
  └ Segment 2: 00:00:11 - 00:00:14 (89% bird frames)

✅ Status: Significant bird activity detected
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Advanced Options

# Custom threshold and sample rate
vogel-analyze --threshold 0.4 --sample-rate 10 video.mp4

# Set output language (en/de, auto-detected by default)
vogel-analyze --language de video.mp4

# Delete only video files with 0% bird content
vogel-analyze --delete-file --sample-rate 5 *.mp4

# Delete entire folders with 0% bird content
vogel-analyze --delete-folder --sample-rate 5 ~/Videos/*/*.mp4

# Save JSON report and log
vogel-analyze --output report.json --log video.mp4

Python Library

from vogel_video_analyzer import VideoAnalyzer

# Initialize analyzer
analyzer = VideoAnalyzer(
    model_path="yolov8n.pt",
    threshold=0.3
)

# Analyze video
stats = analyzer.analyze_video("bird_video.mp4", sample_rate=5)

# Print formatted report
analyzer.print_report(stats)

# Access statistics
print(f"Bird content: {stats['bird_percentage']:.1f}%")
print(f"Segments found: {len(stats['bird_segments'])}")

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🎯 Use Cases

1. Quality Control for Bird Recordings

Automatically verify that recorded videos actually contain birds:

vogel-analyze --threshold 0.5 --delete recordings/**/*.mp4

2. Archive Management

Identify and remove videos without bird content to save storage:

# Find videos with 0% bird content
vogel-analyze --output stats.json archive/**/*.mp4

# Delete empty videos
vogel-analyze --delete archive/**/*.mp4

3. Batch Analysis for Research

Process large video collections and generate structured reports:

# Analyze all videos and save individual reports
for video in research_data/**/*.mp4; do
    vogel-analyze --sample-rate 10 --output "${video%.mp4}_report.json" "$video"
done

4. Integration in Automation Workflows

Use as part of automated recording pipelines:

from vogel_video_analyzer import VideoAnalyzer

analyzer = VideoAnalyzer(threshold=0.3)
stats = analyzer.analyze_video("latest_recording.mp4", sample_rate=5)

# Only keep videos with significant bird content
if stats['bird_percentage'] < 10:
    print("Insufficient bird content, deleting...")
    # Handle deletion
else:
    print(f"✅ Quality video: {stats['bird_percentage']:.1f}% bird content")

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⚙️ Configuration Options

Option	Description	Default	Values
--model	YOLO model to use	yolov8n.pt	Any YOLO model
--threshold	Confidence threshold	0.3	0.0 - 1.0
--sample-rate	Analyze every Nth frame	5	1 - ∞
--output	Save JSON report	-	File path
--delete	Auto-delete 0% videos	False	Flag
--log	Enable logging	False	Flag

Sample Rate Recommendations

Video FPS	Sample Rate	Frames Analyzed	Performance
30 fps	1	100% (all frames)	Slow, highest precision
30 fps	5	20%	⭐ Recommended - Good balance
30 fps	10	10%	Fast, sufficient
30 fps	20	5%	Very fast, basic check

Threshold Values

Threshold	Description	Use Case
0.2	Very sensitive	Detects distant/partially obscured birds
0.3	Standard	Balanced detection
0.5	Conservative	Only clearly visible birds
0.7	Very strict	Only perfect detections

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🔍 Technical Details

Model Search Hierarchy

The analyzer searches for YOLOv8 models in this order:

1. models/ directory (local)
2. config/models/ directory
3. Current directory
4. Auto-download from Ultralytics (fallback)

Detection Algorithm

• Target Class: Bird (COCO class 14)
• Inference: Frame-by-frame YOLOv8 detection
• Segment Detection: Groups consecutive bird frames with max 2-second gaps
• Performance: ~5x speedup with sample-rate=5 on 30fps videos

Output Format

JSON reports include:

{
  "video_file": "bird_video.mp4",
  "duration_seconds": 15.0,
  "total_frames": 450,
  "frames_analyzed": 90,
  "bird_percentage": 80.0,
  "bird_segments": [
    {
      "start": 2.0,
      "end": 8.0,
      "detections": 36
    }
  ]
}

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📚 Documentation

• GitHub Repository: vogel-video-analyzer
• Parent Project: vogel-kamera-linux
• Issue Tracker: GitHub Issues

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🤝 Contributing

Contributions are welcome! We appreciate bug reports, feature suggestions, documentation improvements, and code contributions.

Please read our Contributing Guide for details on:

• How to set up your development environment
• Our code style and guidelines
• The pull request process
• How to report bugs and suggest features

For security vulnerabilities, please see our Security Policy.

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📄 License

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

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🙏 Acknowledgments

• Ultralytics YOLOv8 - Powerful object detection framework
• OpenCV - Computer vision library
• Vogel-Kamera-Linux - Parent project for automated bird observation

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📞 Support

• Issues: GitHub Issues
• Discussions: GitHub Discussions

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Made with ❤️ by the Vogel-Kamera-Linux Team