From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-08-16T12:11:13+09:00
Subject: Re: mp3 file magic number identification


On Aug 15, 2007, at 7:23 PM, Adam Shelly wrote:

> On 8/15/07, John Joyce <dangerwillrobinsondanger@gmail.com> wrote:
>> Does anybody know how to identify (validate) mp3 files (other audio
>> files would be interesting as well) by 'magic number'?
>
> I know for sure that:
> = wave files start with the characters 'RIFF' followed by 4 bytes
> (filesize-8) followed by 'WAVE'.
> = ogg vorbis files start with 'oggS' followed by 24 bytes then 0x01
> and the string 'vorbis'
> = MIDI files start with 'MThd'
>
> and according to wikipedia (and verified with one file on my system)
> = MP3 files should start with 0xFF FB or 0xFF FA.
>
> -Adam
>
Thanks Adam, that's the kind of thing I'm looking for exactly.
If anyone can contribute more audio file magic numbers, please do!

I guess video/AV files should be next as well, primarily things  
like .mov, .wmv, etc...
Oh, and I think we should find out if smaf is the same as midi.

These kind of validation tools can be useful to us all these days.