Smart Video Speedup

An intelligent video processing tool that enhances lecture viewing efficiency through automated content analysis and dynamic speed adjustment.

Audio Analysis Implementation

The core functionality relies on sophisticated audio stream analysis:

The system processes audio streams in multiple passes:

• Initial silence detection using amplitude thresholds
• Pattern recognition for recurring pause patterns
• Speech rate analysis for optimal speedup calculation

Processing Architecture

The implementation uses FFMPEG’s libraries for precise media manipulation:

• Frame-accurate video segmentation
• Audio stream preservation during speed adjustment
• Seamless segment recombination
• Memory-efficient processing for large files

Performance Optimization

Several key optimizations ensure efficient processing:

• Parallel processing for analysis and encoding
• Buffer management for reduced memory footprint
• Adaptive threshold adjustment for varied input sources
• Smart caching of processed segments

Command Line Interface

The tool prioritizes accessibility through a streamlined interface:

speedup input.mp4 output.mp4 --factor 1.5

This simple command masks the complexity of:

• Automatic format detection
• Intelligent speed ramping
• Quality preservation
• Progress monitoring

The result is a practical tool that significantly reduces lecture viewing time while maintaining content comprehension and audio quality.