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| import soundfile as sf | |
| import numpy as np | |
| from pyloudnorm import Meter, normalize | |
| import os | |
| def normalize_loudness(audio_path, target_loudness, target_path): | |
| """ | |
| 归一化音频文件的响度到指定的目标响度。 | |
| 参数: | |
| audio_path (str): 原始音频文件的路径。 | |
| target_loudness (float): 目标响度值(LUFS)。 | |
| target_path (str): 归一化后音频的保存路径。 | |
| 返回: | |
| bool: 归一化操作是否成功。 | |
| """ | |
| try: | |
| # 读取音频文件 | |
| data, rate = sf.read(audio_path) | |
| # 创建响度仪表,基于ITU-R BS.1770 | |
| meter = Meter(rate) # 采样率 | |
| # 测量音频的响度 | |
| loudness = meter.integrated_loudness(data) | |
| # 响度归一化 | |
| normalized_audio = normalize.loudness(data, loudness, target_loudness) | |
| os.makedirs(os.path.dirname(target_path), exist_ok=True) | |
| # 保存归一化后的音频文件 | |
| sf.write(target_path, normalized_audio, rate) | |
| return True | |
| except Exception as e: | |
| raise e |