[M4IF Technotes] 3GPP file parsing. stsd atom and H.263

[emre.aksu nokia.com]

Hi Samuel,
The relevant information can be found in the Annex D of 3GPP Specification TS 26.234 Release 5 document. You can get the document from the following ftp link:
ftp://ftp.3gpp.org/Specs/archive/26_series/26.234/26234-540.zip
Note that there will be a new 3GPP specification document for Release 6, which will only be covering the 3GP issues: TS 26.244. You can also find it in the same ftp site.
ftp://ftp.3gpp.org/Specs/archive/26_series/26.444/26244-013.zip 
Regards,
Emre Aksu
Nokia Mobile Phones
-----Original Message-----
From: ext Samuel.Rouiller   crealogix.com [mailto:Samuel.Rouiller   crealogix.com]
Sent: 05 June, 2003 12:37
To: technotes   lists.m4if.org
Subject: [M4IF Technotes] 3GPP file parsing. stsd atom and H.263
Hi, 
I am trying to write a Java parser for 3GPP files. I use the ISO/IEC 14496-1 spec as information basis. 
I do not understand how to parse the 'stsd' atom. I have a track containing an H.263 video. If I understand it right I should be able to retrieve configuration parameter for the H.263 codec from this atom. 
Could anybody tell me how to find this information. I pasted hereunder the stsd atom of a 3GPP example file. 
00000186h: 00 00 00 75 73 74 73 64 00 00 00 00 00 00 00 01 ; ...ustsd........ 
00000196h: 00 00 00 65 73 32 36 33 00 00 00 00 00 00 00 01 ; ...es263........ 
000001a6h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 
000001b6h: 00 80 00 60 00 48 00 00 00 48 00 00 00 00 00 00 ; .EUR.`.H...H...... 
000001c6h: 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 
000001d6h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 
000001e6h: 00 00 00 18 FF FF 00 00 00 0F 64 32 36 33 48 4E ; ....ÿÿ....d263HN 
000001f6h: 54 52 00 0A 00                                  ; TR... 
I am very new to MPEG and media programming in general so any help will be appreciated. 
Thanks in advance, 
Samuel 
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