[Mp4-tech] MP4 file format?

[Dave Singer]

At 11:58 AM +0800 2/25/04, William Tsang{RPI Alum} wrote:
>Dave Singer wrote:
>
>>The QuickTime file format is remarkably similar but is NOT the same 
>>as MP4.  You cannot, for example, rename files between the two and 
>>have it work.
>>
>>Was part 14 ever free to download?
>
>Yea, i was reading the QuickTime file format doc and found out it's 
>not really helping for me to parse thru a .mp4 file.  Somehow, i 
>just can't find the any similar atom tags that's described in the 
>Quicktime file format doc.  The .mp4 clip i created with a software 
>call "MPEG4 Direct Maker" is able to playback with Quicktime player, 
>so i guess that means that the .mp4 clip i created is using the ISO 
>MP4 file format, otherwise, the QuickTime player won't play it right?
>I also checked the price for the part14 doc and it's just too 
>expensive to even think about it.  Anyone can point me some more 
>direction of what i can do here? thanks
>Will

I have written chapters in books and presentations, but they 
intentionally don't duplicate the standard.
However, the basic movie atom structures are almost identical (MP4 
doesn't use data handlers, for example).  However, both MP4 and QT 
allow atoms that the other doesn't use, and of course MP4 has 
code-points specific to mpeg-4.
>
>P.S.:I remembered someone sent me an email asking me where to find 
>the Quicktime doc too, here is the link
>http://developer.apple.com/documentation/quicktime/FileFormatSpecification-date.html

-- 
David Singer
Apple Computer/QuickTime