how do you determine if a file is a media file?

[Josh Mellicker]

Wow, that could be just the ticket.

The new link seems to be:

http://en.wikipedia.org/wiki/Magic_number_%28programming%29

Thanks!


On Sep 26, 2007, at 4:20 PM, Mark Smith wrote:

> Josh, many (most?) media file-types have 'magic-numbers' at the  
> start (and sometimes also at the end), which identify them as  
> whatever type they are.
>
> Have a look at http://en.wikipedia.org/wiki/Magic_number_(programming)
>
> Best,
>
> Mark
>
>
> On 27 Sep 2007, at 00:00, Josh Mellicker wrote:
>
>> I am working on a handler to determine whether a file is a media  
>> file. (for OS X and Windows)
>>
>> First, I check if the file has a proper extension (.mov, .jpg,  
>> etc.) if so, I assume the extension is correct (a leap of faith  
>> perhaps)
>>
>> Second, I try to get the OS X filetype from the detailed files.  
>> Some movies properly list "Moov", some don't.
>>
>> Third, was going to try loading the file into a Player or Image  
>> object and see if there's an error, but many types of files will  
>> load into those objects fine (like text files)
>>
>> So, I'm wondering if anyone has any tips beyond these things...
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