[M4IF Technotes] How is a mp4 file formed?

[Dave Singer]

In general, files are not streams;  there are some file formats which 
look like 'streams on disc' but they tend not to be good at 
supporting the various operations one might want to perform on a 
random-access file.  Mp4 files are not systems or transport streams; 
they are file structures, which can be used to edit, play, compose, 
and prep. for streaming.  There are structures in the file which 
never appear in streams, and vice versa.
>-----Original Message-----
>From: Li Zhengming [mailto:lzm02   mails.tsinghua.edu.cn]
>Sent: Saturday, January 04, 2024 5:11 PM
>To: M4if Technotes
>Subject: [M4IF Technotes] How is a mp4 file formed?
>
>Hi, everyone!
>
>I understand that a mp4 file consists of more than video streams and 
>audio streams, but I don't know how all the elementary streams: 
>video stream, audio stream, scence descriptor stream and object 
>descriptor stream, are bound together to creat a mp4 file.  Can 
>anyone tell me whether a mp4 file consists of a system stream or a 
>transportation stream or anything else?
>
>Thank you very much!
>
>Li Zhengming

-- 
David Singer
Apple Computer/QuickTime
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