[M4IF Technotes] 3gp information please

[Eyal Peleg]

Hi.
I have a little question for clarifying the issue. 
Basically if I use the ISO encoder for mp4, and save the file with .3gp
extension, it is a .3gp file? Doesn't the 3gp file have different headers
than .mp4?
Regards, 
Eyal Peleg
-----Original Message-----
From: AVARO Olivier FTRD/DIH/REN [mailto:olivier.avaro   rd.francetelecom.com]
Sent: Wednesday, March 12, 2024 6:06 AM
To: Nikki Cranley; Technotes   lists.m4if.org
Subject: RE: [M4IF Technotes] 3gp information please
Dear Nikki, 
The .3gp file format is a derivative format from the ISO File Format
recently standardized jointly  by MPEG and JPEG.
3GPP supports other codecs than MPEG-4 so they have defined some extensions
to signal them.
If you use the same codecs than MPEG-4, you can make a file that is both
compatible to .3GP and .MP4 by the mean of multiple branding.
In the interest of interoperability, it is advised to do so.
Kind regards,
O.
-----Message d'origine-----
De : Nikki Cranley [mailto:94426082   eeng.dcu.ie]
Envoyé : mardi 11 mars 2003 11:22
À : Technotes   lists.m4if.org
Objet : [M4IF Technotes] 3gp information please
Hi All,
This is the first time Ive heard about .3gp.
Could anyone tell me where I can find out more about this file format and in
particular how it differs from mp4.
Thanking you, regards,
Nikki
Nikki Cranley,
Performance Engineering Lab, 
Mobile Multimedia,
DCU School of Engineering, S220
UCD Dept. of Computer Science, A006
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