バイナリにRIFFフォーマットのヘッダを追加してWAVで保存します

any2wav.py

#!/usr/bin/env python

# usage : python any2wav.py <inputfile> <outputfile>

import sys
import struct

def uint2ToStr(x) : return struct.pack('<H',x)
def uint4ToStr(x) : return struct.pack('<I',x)

#setup
bitdepth = 16
channel = 2
samplingrate = 44100

blocksize = channel * (bitdepth/8)
byterate = samplingrate * blocksize

infile = open(sys.argv[1], 'rb')
data = infile.read()
filesize = len(data)

shortage = blocksize - (filesize % blocksize)
for i in range(shortage) :
    data += '\0'

filesize += shortage

outfile = open(sys.argv[2] + '.wav', 'wb')
outfile.write('RIFF'\
              + uint4ToStr(filesize + 36)\
              + 'WAVEfmt '\
              + uint4ToStr(16) + uint2ToStr(1)\
              + uint2ToStr(channel)\
              + uint4ToStr(samplingrate)\
              + uint4ToStr(byterate)\
              + uint2ToStr(blocksize)\
              + uint2ToStr(bitdepth)\
              + 'data'\
              + uint4ToStr(filesize)\
              + data)

infile.close()
outfile.close()
sys.exit(1)