From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-08-16T12:07:18+09:00
Subject: Re: mp3 file  magic number identification


On Aug 15, 2007, at 5:45 PM, Stefan Mahlitz wrote:

> John Joyce wrote:
>> Does anybody know how to identify (validate) mp3 files (other audio
>> files would be interesting as well) by 'magic number'?
>
>> I did find this online as a purported mp3 magic number (in hex of  
>> course),
>> 49 44 33
>> but I'm not even going to bother using it since I don't know
>> definitively that all mp3's will have it, and I don't know where to
>> expect it in the file.
>
> does this help: http://raa.ruby-lang.org/project/filemagic/
>
> Stefan
>
Thanks Stefan, but I should have said, I was hoping for the pure Ruby  
implementation. More portable that way.