def duration(wav_file):
wav = wave.open(wav_file, 'r')
frames = wav.getnframes()
rate = wav.getframerate()
dur = frames / float(rate)
#print 'duration: %f' % duration
wav.close()
return dur
def read_wav_data(filename):
wav = wave.open(filename, "rb") # 打开一个wav格式的声音文件流
num_frame = wav.getnframes() # 获取帧数
num_channel = wav.getnchannels() # 获取声道数
framerate = wav.getframerate() # 获取帧速率
num_sample_width = wav.getsampwidth() # 获取实例的比特宽度，即每一帧的字节数
str_data = wav.readframes(num_frame) # 读取全部的帧
wav.close() # 关闭流
wave_data = np.fromstring(str_data, dtype=np.short) # 将声音文件数据转换为数组矩阵形式
wave_data.shape = -1, num_channel # 按照声道数将数组整形，单声道时候是一列数组，双声道时候是两列的矩阵
wave_data = wave_data.T # 将矩阵转置
return wave_data, framerate