Thansk

Actually, I have gone through few of the docs and the RFC 3267 as
well.

I have the Payload as the following bytes, So we can see we dont have
F0, BC or 3C bytes (which are required generally) and these follwing
bytes are after i remove the RTP header bytes of 12 bytes.

F3F81C186225D000902031168DC45CD4F0001F79C3E72BA50000FE9B2872AC98
F3D11558D1828CC6C043EC82BC2FCAE0 AEDDE269DF9E6BD63C7E1870785E3DB8
F3D11C1FF8EE4300100549BE99EF9F946F41144FCDCAAFF69791AEFEE919EADC
F3F81B190DBDDF80D0056796DDF4E5F5 559789033BB162185ABD4127B5D0CDBC
F3CC1BC96D681084B00792D69A37B2E4AFDBB14F07001B69DB5B14FD12843E94

We can see if the above bytes are interpreted then the CMR is 15--> No
Mode Request;
F bit is zero, so its the last frame; FT bits are 0111, so its 12.2
kbps data and left is the speech data.

Now, I am not sure how i can convert this content into the AMR file as
just by adding the AMR header bytes 2321414D520A, is not making this
content playable.
Cna you help me out whre is the missing thing or How i need ot modify
this data to run this content as a playable file.

I have treid if we can add the header 3c before F3 each of the frame
but still the issue persisits.

I am not sure where I have mis-interrete the things. Can you give me
any sort of suggestion in this.

I am laso attaching the RTP payload I have extracted which I want to
convert iton the playalble AMR file.

Regards
Nitin

On Feb 14, 9:59 am, Sumedh Jiwane <[email protected]> wrote:
> RTP describes different payload format for different codecs. You can study
> the RTP payload format for AMR codec and retrieve the data. You can use
> available RTP de-packetizer if you are using any multimedia framework.
>
> Regards,
> Sumedh
>
>
>
>
>
>
>
> On Mon, Feb 13, 2012 at 8:34 PM, NITIN <[email protected]> wrote:
> > Hi
>
> > I ave captured a pcap form my android device on Wireshark. Now, I have
> > the RTP payload having the AMR content.
>
> > I have extracted the raw RTP packets and now I want to convert that
> > raw data into the AMR file which can be played on any player.
>
> > Just by adding the Header and magic number is not enough to do that.
>
> > Do anybody have idea what is the procedure to do it or is there any
> > library or tool which is capable of doing it.
>
> > Thanks
> > Nitin
>
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