| import json | |
| from pydub import AudioSegment | |
| import os | |
| import sys | |
| def segment_audio_from_alignment(audio_path, alignment_path): | |
| """ | |
| Segments a long audio file into chunks based on a word-level | |
| timestamped alignment file. | |
| """ | |
| output_dir = "wavs" | |
| metadata_path = "metadata.csv" | |
| os.makedirs(output_dir, exist_ok=True) | |
| print(f"Loading full audio from: {audio_path}") | |
| try: | |
| full_audio = AudioSegment.from_file(audio_path) | |
| except Exception as e: | |
| print(f"--- ERROR: Could not load the audio file. ---") | |
| print(f"Ensure ffmpeg is correctly installed and the path is correct.") | |
| print(f"Details: {e}") | |
| sys.exit(1) | |
| print(f"Loading alignment data from: {alignment_path}") | |
| with open(alignment_path, 'r', encoding='utf-8') as f: | |
| alignment_data = json.load(f) | |
| with open(metadata_path, 'w', encoding='utf-8') as metadata_file: | |
| print(f"Writing chunks to '{output_dir}' and metadata to '{metadata_path}'...") | |
| chunk_counter = 0 | |
| for segment in alignment_data.get('segments', []): | |
| for word_data in segment.get('words', []): | |
| start_time = word_data.get('start') | |
| end_time = word_data.get('end') | |
| text = word_data.get('word', '').strip() | |
| if start_time is None or end_time is None or not text: | |
| continue | |
| start_ms = int(start_time * 1000) | |
| end_ms = int(end_time * 1000) | |
| audio_chunk = full_audio[start_ms:end_ms] | |
| chunk_counter += 1 | |
| chunk_filename = os.path.join(output_dir, f"chunk_{chunk_counter:05d}.wav") | |
| audio_chunk.export(chunk_filename, format="wav") | |
| metadata_file.write(f"{os.path.basename(output_dir)}/{os.path.basename(chunk_filename)}|{text}\n") | |
| print(f"Processed {chunk_counter} audio chunks.") | |
| def main(): | |
| audio_file = "master.mp3" | |
| alignment_file = "aligned_transcription.json" | |
| if not os.path.exists(audio_file) or not os.path.exists(alignment_file): | |
| print("--- ERROR: Make sure 'master.mp3' and 'aligned_transcription.json' are in the project directory. ---") | |
| sys.exit(1) | |
| segment_audio_from_alignment(audio_file, alignment_file) | |
| if __name__ == "__main__": | |
| main() |