Audio-Video Synchronization Tool

A Python tool that automatically synchronizes audio tracks with video files by analyzing waveform patterns and finding optimal alignment points.

Features

• Automatic audio waveform analysis
• Cross-correlation based synchronization
• Confidence scoring for sync quality
• Support for MP3, WAV, and various video formats
• Preserves original video quality

Requirements

• Python 3.x
• FFmpeg
• NumPy
• SciPy

Installation

1. Install FFmpeg:

# macOS
brew install ffmpeg

# Ubuntu/Debian
sudo apt-get install ffmpeg

# Windows
# Download from https://ffmpeg.org/download.html

2. Install Python dependencies:

pip install numpy scipy

Usage

1. Place your video file and audio file in the same directory as sync_audio.py

2. Update the filenames in the script if needed (default expects video_audio.wav and audio file)

3. Run the synchronization:

python sync_audio.py

The script will:

• Extract audio from the video
• Analyze both audio waveforms
• Find the optimal synchronization offset
• Create a new video file with synchronized audio

How It Works

The tool uses cross-correlation to find matching patterns between two audio signals:

1. Audio Extraction: Extracts audio from the video file
2. Waveform Analysis: Loads and normalizes both audio signals
3. Cross-Correlation: Computes correlation between audio segments
4. Offset Detection: Identifies the time offset with highest correlation
5. Video Generation: Creates new video with properly aligned audio

Output

• synchronized_video.mp4 - Video with synchronized audio
• Console output showing offset and confidence score

License

MIT