How to create wav type file with bytes

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Hi all , i am trying to create .wav type audio file with bytes, actually i have .m4a format file i read the file into bytes then i create a another .wav format file, with below code

C#

var bytes = File.ReadAllBytes(Server.MapPath("Audios/Breakfast.m4a"));      
        using (FileStream fs = File.Create(@"C:\Docs\myFile.wav"))
            {
                fs.Write(bytes, 0, bytes.Length);
            }

and the file is created, but cannot play. if i try to read the created file(myFile.wav) by using Naudio dll with below code
var myReader = new WaveFileReader(@"C:\Docs\myFile.wav");

it show below Error Message
System.FormatException: Not a WAVE file - no RIFF header
here how can i Create .wav files without any issues by using Bytes ?
TIA

What I have tried:

C#

var bytes = File.ReadAllBytes(Server.MapPath("Audios/Breakfast.m4a"));     
       using (FileStream fs = File.Create(@"C:\Docs\myFile.wav"))
           {
               fs.Write(bytes, 0, bytes.Length);
           }

Posted 7-Nov-16 1:29am

Ranjeeth Kumar Vootukuri

Updated 7-Nov-16 1:50am

v2

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OriginalGriff · Answer 1 · 2016-11-07T01:46:00

That won't work.
Changing the file extension does not affect the data - the information in the "myFile.wav" file is identical to the information in the "Breakfast.m4a" file. Which means it's a valid M4A file, but an invalid WAV file - so the WAV file reader can't process it.
It's a bit like prying the Ford badges off your car and fitting Ferrari ones - it's not going to fool anyone into thinking it's a sports car!

To change m4a files to wav you have to change the format, which is not a trivial process. I'd suggest you find a pre-built converter and use that as a command line tool to do the conversion.

CDP1802 · Answer 2 · 2016-11-07T01:50:00

Solution 2

You can't just dump some bytes into a file and expect that they magically become something else.

Do some research on the source data format (M4A) and the destination format (WAV), learn how to extract the raw audio data from the source, convert it and then write a valid file in the destination format.

Here is a link to some information on the WAV format: RIFF WAVE – Wikipedia[^]

Posted 7-Nov-16 1:50am

CDP1802

Updated 7-Nov-16 1:57am

v2

Comments

#realJSOP 7-Nov-16 7:56am

"You can't just dump some bytes into a file and expect that they magically become something else."

Hillary Clinton seems to be able to pull it off...

[no name] 7-Nov-16 8:01am

This time your election has become a choice between Scylla and Charybdis.