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我正在编写一个程序来注释 .wav 文件,所以我需要播放它们并知道它们的持续时间。我可以使用winsound模块播放(使用SND_ASYNC),但我不能使用wave模块读取文件,因为我使用的文件不支持压缩。

我应该使用另一个模块来获取 .WAV 文件的持续时间,还是应该使用一个模块来播放和获取有关文件的信息?我应该使用哪些模块?

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2 回答 2

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查看评论,这是可行的(我为自己的可读性做了一些更改)。谢谢@Aya!

import os
path="c:\\windows\\system32\\loopymusic.wav"
f=open(path,"rb")

# read the ByteRate field from file (see the Microsoft RIFF WAVE file format)
# https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
# ByteRate is located at the first 28th byte
f.seek(28)
a = f.read(4)

# convert string a into integer/longint value
# a is little endian, so proper conversion is required
byteRate = 0
for i in range(4):
    byteRate += a[i] * pow(256, i)

# get the file size in bytes
fileSize = os.path.getsize(path)  

# the duration of the data, in milliseconds, is given by
ms = ((fileSize - 44) * 1000)) / byteRate

print "File duration in miliseconds : " % ms
print "File duration in H,M,S,mS : " % ms / (3600 * 1000) % "," % ms / (60 * 1000) % "," % ms / 1000 % "," ms % 1000
print "Actual sound data (in bytes) : " % fileSize - 44
f.close()
于 2013-06-25T21:21:21.107 回答
0

使用 SciPy:

 from scipy.io import wavfile
 Fs, x = wavfile.read("file.wav")
 print('Duration: ', len(x)/Fs)
于 2019-01-04T04:45:28.193 回答