Python：wave 库高级用法举例和应用详解

import wave  # 导入wave模块

# 场景：读取并输出WAV文件的基本信息
file_path = 'example.wav'  # WAV文件路径
with wave.open(file_path, 'rb') as wav_file:  # 以读模式打开WAV文件
    channels = wav_file.getnchannels()  # 获取声道数
    sample_width = wav_file.getsampwidth()  # 获取样本宽度
    frame_rate = wav_file.getframerate()  # 获取帧率
    frames = wav_file.getnframes()  # 获取总帧数
    duration = frames / float(frame_rate)  # 计算音频时长

    # 输出音频文件的基本信息
    print(f'Channels: {channels}')
    print(f'Sample Width: {sample_width} bytes')
    print(f'Frame Rate: {frame_rate} frames/second')
    print(f'Total Frames: {frames}')
    print(f'Duration: {duration} seconds')

import wave  # 导入wave模块

# 场景：创建一个新的WAV文件并写入音频数据
file_path = 'new_example.wav'  # 新的WAV文件路径
with wave.open(file_path, 'wb') as wav_file:  # 以写模式打开WAV文件
    params = (2, 2, 44100, 0, 'NONE', 'not compressed')  # 设置参数：声道数、样本宽度、帧率、总帧数、压缩类型、压缩描述
    wav_file.setparams(params)  # 设置文件参数
    frames = b'\x00\x00\x10\x00\x00\x00\x10\x00' * 44100  # 生成简单的音频数据，每个样本都是静音
    wav_file.writeframes(frames)  # 写入音频数据

    # 打开并输出写入的WAV文件信息
    with wave.open(file_path, 'rb') as read_file:
        print("WAV file successfully written with the following params:")
        print(f'Channels: {read_file.getnchannels()}')
        print(f'Sample Width: {read_file.getsampwidth()} bytes')
        print(f'Frame Rate: {read_file.getframerate()} frames/second')
        print(f'Total Frames: {read_file.getnframes()}')

import wave  # 导入wave模块

# 场景：读取一个现有的WAV文件并将其音频数据修改后写入新的WAV文件
input_file_path = 'example.wav'  # 输入WAV文件路径
output_file_path = 'modified_example.wav'  # 输出WAV文件路径

# 读取原始WAV文件
with wave.open(input_file_path, 'rb') as read_file:
    params = read_file.getparams()  # 获取原始文件参数
    frames = read_file.readframes(read_file.getnframes())  # 读取所有音频帧数据

# 修改音频数据，例如：反转音频
modified_frames = frames[::-1]

# 写入修改后的音频数据到新的WAV文件
with wave.open(output_file_path, 'wb') as write_file:
    write_file.setparams(params)  # 设置文件参数
    write_file.writeframes(modified_frames)  # 写入修改后的音频数据

# 输出完成信息
print("Audio data from original file has been modified and saved to new file.")