How to convert an mp3 file into binary and its reverse

How to convert an mp3 file into binary and its reverse

[ola lawson]

Would it be possible to explain the reverse method, finding it difficult to convert it back into mp3 file

[Walter Roberson]

fid = fopen('OutputFile.mp3', 'w');
fwrite(fid, TheVectorOfUint8);
fclose(fid);

Answer 1

[Walter Roberson]

mp3_content = uint8( fileread('YourFile.mp3') );

The exact contents of the file are now a series of 8 bit unsigned integers, which you can process as usual, such as with dec2bin().

In the reverse side, once you have a vector of 8 bit unsigned integers,

fid = fopen('OutputFile.mp3', 'w');
fwrite(fid, TheVectorOfUint8);
fclose(fid);

and now OutputFile.mp3 will be the same contents as the original .mp3 file.

[P Harika]

But the file "OutputFile.mp3" is different from the Original File

[Walter Roberson]

fid = fopen('YourFile.mp3', 'r');
mp3_content = fread(fid, [1 inf], '*uint8');
fclose(fid);

fid = fopen('OutputFile.mp3', 'w');
fwrite(fid, TheVectorOfUint8);
fclose(fid);

The two files should be the same.