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

[Samuel.Rouiller crealogix.com]

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 ; 
.€.`.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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