CODEWITHSUNDEEP
python-2.7
AndresS
AndresS

Reputation: 73

How can I convert a Raw Data file of Audio in .Wav with python

Knowing some things like : Encoding : 16bit pcm, Byte order Little Endian , Channels : 1 Mono, Start offset : 0 bytes , Amount to import : 100% and Sample rate 16000 Hz.

That Characteristics were given by Audacity, in that way I can hear it in this program.

But I want to do it in Python code.

Upvotes: 7

Views: 12431

Answers (2)

ruhong
ruhong

Reputation: 1903

Read bytes (rb) from the raw file and write bytes (wb) to WAV after setting the header. See wave module

import wave

with open("sound.raw", "rb") as inp_f:
    data = inp_f.read()
    with wave.open("sound.wav", "wb") as out_f:
        out_f.setnchannels(1)
        out_f.setsampwidth(2) # number of bytes
        out_f.setframerate(44100)
        out_f.writeframesraw(data)

Check the header of the WAV file:

with wave.open("sound.wav", "rb") as in_f:
    print(repr(in_f.getparams()))

It should print something like _wave_params(nchannels=1, sampwidth=2, framerate=44100, nframes=220500, comptype='NONE', compname='not compressed')

Upvotes: 6

mail2subhajit
mail2subhajit

Reputation: 1150

Yes, can do this using the wave library or wavio api

https://docs.python.org/2/library/wave.html

Open The wave file in write binary mode.

wave.open(file[, mode]) If file is a string, open the file by that name, otherwise treat it as a seekable file-like object. mode can be any of

'w', 'wb' Write only mode.

Set all the parameter of the wav file as you have shared w.r.t the audacity

Wave_write.setparams(tuple) The tuple should be (nchannels, sampwidth, framerate, nframes, comptype, compname), with values valid for the set*() methods. Sets all parameters.

Open the raw file in binary mode and pass the data to these function.

Wave_write.writeframesraw(data)¶ Write audio frames, without correcting nframes.

Wave_write.writeframes(data) Write audio frames and make sure nframes is correct.

once done close the file handle.

Wave_write.close() Make sure nframes is correct, and close the file if it was opened by wave. This method is called upon object collection.

I hope you can implement the python code based on these description.

Upvotes: 5

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