[Mp4-tech] AAC header in MP4 file format

[Trevor NG]

Huming,
Mp4 is the iso file format for containing mpeg-4 streams. For
definitions of moov and mdat you have 
to refer to ISO/IEC 14496-12 and 14. After you read these two documents,
you should be able to decode the "00 02 6a dc 6d 64 61 74 c0 11 a5 02
60..." yourself. 
00 02 6a dc : size of atom mdat
6d 64 61 74 : ascii code of "mdat"
c0 11 a5 02 60 ...... : real data of mdat atom.
Hope this helps.
Rgds,
Trevor
-----Original Message-----
From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of CzCt
Sent: Thursday, August 07, 2023 8:35 AM
To: mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech] AAC header in MP4 file format
hi,all
   What is the MP4 file format(include the audio and video)?
   what are the ATOM,such as "moov","mdata", represented by in the
stream?
   I found with the MP4 file format streams that i have, that the first
HEX datas
 are "00 02 6a dc 6d 64 61 74 c0 11 a5 02 60 ...........".
   can you tell me what it means? 
   regards
   huming
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