[NTLUG:Discuss] WAV file analysis

[Ralph Green]

On Mon, 2009-02-02 at 07:55 -0600, Leroy Tennison wrote:
> Admittedly OT but hopefully someone can help.  Does anyone know of a 
> program which will analyze a WAV file for proper format?  It could be a 
Howdy,
  I am enclosing a simple python program to do what you ask for.  Look
at it and modify it as to make it more useful.  Right now, you pass it
the file name of a wave file.  It looks at the header to see what the
size should be and compares that to the actual size.  If they are
different, it prints a message.  If the file size looks right, it prints
nothing.

import struct
import os
import sys

if len(sys.argv) < 2:  
	print 'Incorrect Command Line Syntax ...'
	print ' '
	print 'Usage: Python testWavSize.py </Filepath/Filename.Ext> <Enter>'
	print ' '
	print sys.exit()

#infile = open(sys.argv[1], 'r')
f = open(sys.argv[1],"rb")

# read the file header
#  This is the Format of the Wave Header (44 Bytes)
#  See the helpfiles for struct, wave format

fmtstr = "4sL4s4sLhhLLhh4sL"

header = struct.unpack(fmtstr,f.read(44))
#print header  # print it out as a tuple
(ID, Chunksize,Format,SubChunkID,
SubChunkSize,AudioFmt,Channels,SampleRate,
 ByteRate,BlockAlign,BitsPerSample,
 Subchunk2ID,Subchunk2Size) = header

f.close()

actualSize = os.path.getsize(sys.argv[1])
if Chunksize+8 != actualSize:
   print "The Header thinks the file size is %d, while the filesize is
really %d" \
         % (Chunksize+8, actualSize)