[mp4-tech] format of amr data stored in .3gp file

[mallikarjun rao]

Hello experts,
Can any body tell me, the format of  amr data stored in .3gp file.?
I am having MP4 parser, which is giving amr data output, for a given .3gp(mpeg4 video + amr) input file.
Is the amr data format type is Interface Format 1 or Interface format 2 or other format?
I am having a amr decoder which decodes the files either in MMS_IO format or  file format  which defined in 26073 document.
With these both options, it is not decoding the parser output amr data.
Can you tell me how to convert a .3gp file to above to formats and the parser is giving output in which format?
The audio output of the parser for a .3gp file (mpeg4 video + aac), I am able to decode with aac decoder and play it successfully.
Thanks in advance
Thanks&Regds
Mallikarjun
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