Audio Extractor

Extracts audio from video files to WAV format for further analysis. Converts to mono 16kHz PCM format optimized for speech/energy analysis.

Use Cases

• Extracting audio for speech analysis
• Preparing audio for energy calculation
• Converting video audio to standard format

Usage

python3 /root/.claude/skills/audio-extractor/scripts/extract_audio.py \
    --video /path/to/video.mp4 \
    --output /path/to/audio.wav

Parameters

• --video: Path to input video file
• --output: Path to output WAV file
• --sample-rate: Audio sample rate in Hz (default: 16000)
• --duration: Optional duration limit in seconds (default: full video)

Output Format

• Format: WAV (PCM 16-bit signed)
• Channels: Mono
• Sample rate: 16000 Hz (default)

Dependencies

• ffmpeg

Example

# Extract first 10 minutes of audio
python3 /root/.claude/skills/audio-extractor/scripts/extract_audio.py \
    --video lecture.mp4 \
    --duration 600 \
    --output audio.wav

Notes

• Output is always mono for consistent analysis
• 16kHz sample rate is sufficient for speech analysis and reduces file size
• Supports any video format that ffmpeg can read