| """Create the 16 kHz mono WAVs referenced by a selected training manifest.""" |
| import argparse |
| from pathlib import Path |
| import subprocess |
| import sys |
|
|
| sys.path.insert(0, str(Path(__file__).resolve().parents[1])) |
| from preprocess.common import load_manifest |
| from preprocess.resolve_paths import resolve_paths |
|
|
|
|
| def prepare_audio(manifest, dataset_root): |
| rows, _ = load_manifest(manifest) |
| rows = resolve_paths(rows, dataset_root) |
| paths = sorted({Path(row[key]) for row in rows |
| for key in ('audio_file', 'audio_file_listen') if row.get(key)}) |
| created = 0 |
| for destination in paths: |
| if destination.is_file(): |
| continue |
| assert destination.name.endswith('_16k.wav'), destination |
| source = destination.with_name(destination.name.removesuffix('_16k.wav') + '.wav') |
| assert source.is_file(), source |
| subprocess.run(['ffmpeg', '-nostdin', '-v', 'error', '-n', '-i', str(source), |
| '-vn', '-ac', '1', '-ar', '16000', '-c:a', 'pcm_s16le', str(destination)], check=True) |
| created += 1 |
| return created |
|
|
|
|
| def main(): |
| parser = argparse.ArgumentParser(description=__doc__) |
| parser.add_argument('--input', default=str(Path(__file__).resolve().parents[1] / 'manifests/train_selected81.json')) |
| parser.add_argument('--dataset-root', required=True) |
| args = parser.parse_args() |
| print(f'Created {prepare_audio(args.input, args.dataset_root)} WAVs; existing files were retained.') |
|
|
|
|
| if __name__ == '__main__': |
| main() |
|
|
