[Examples] Enhance real-time transcription with VAD, word timestamps, and CLI options #2701
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…amps, and more Enhanced real_time_transcription.py: - Voice Activity Detection (VAD) for efficient speech segmentation - CLI arguments for model, language, device, output file - Audio device selection with --list-devices - Live audio level visualization with color-coded bar - Word-level timestamps (--word-timestamps) - Speaker change detection hints (--detect-speakers) - Duplicate transcript filtering using similarity scoring - Beautiful terminal UI with box-drawn headers Updated README.md: - Documented new real-time transcription features - Added quick start examples for common use cases
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This PR builds upon #2696 and significantly enhances the real-time transcription example with production-ready features.
New Features
Voice Activity Detection (VAD)
--energy-threshold)Word-Level Timestamps
--word-timestampsflag shows timing for each wordSpeaker Change Detection (Experimental)
--detect-speakersprovides hints when speaker changes are detectedAudio Device Selection
--list-devicesto show available microphones--device-idto select a specific input deviceEnhanced User Experience
--output,--timestamps)Usage Examples
Basic usage
python examples/real_time_transcription.py
With word timestamps
python examples/real_time_transcription.py --word-timestamps
Save transcript with timestamps
python examples/real_time_transcription.py --output notes.txt --timestamps
Use specific model and language
python examples/real_time_transcription.py --model small --language es## Changes
examples/real_time_transcription.py- Complete rewrite with new featuresREADME.md- Updated documentation with usage examples