How to convert LATM to AAC?

ytu_cyc · 8th November 2010, 07:47

Hi All,

I received some RTP Packets, and need to convert them to aac, so the media player can play.

I got some information from rfc3016 and knew the RTP payload format for Audio is like:
RTP Header + AduioMuxElement

and AudioMuxElement was consisted of PayloadLengthInfo and PayloadMux.

I think PayloadMux is what i need, right?

where can i get some useful information about PayLoadLengthInfo and PayLoad Mux?

I think if i know how many bytes PayloadLengthinfo have, i can calc and parser out AAC data(PyaLoadMux).
am i right?

sorry for my poor English.

Thanks all.

nitinkumgoyal · 6th April 2012, 12:13

hey man

have u got any solution for this query. I know its very old post still, let me know if you got any idea on it.

I have the RTP packets having the LATM packets and i want to depacketize them.

Any code or algorithm will be very helpful.

REgards
Nitin

zmejce · 14th April 2012, 22:27

Maybe you can play the LATM file in player such as VLC, and capture to WAV with "Sound recorder/editor" application, then you can convert the wav with ex. iTunes if you prefer apple's AAC, winamp- if you prefer FhG AAC, or Foobar + Nero AAC encoder.

nitinkumgoyal · 15th April 2012, 10:06

thanks man.

But i have the content in RTP packets. So, i can play it. I firstly need to depacketize the content from the RTP packets and then extract the latm content and only after play or convert it.

So, i am actually looking for the algo of depacketization.

8th November 2010, 07:47	#1 \| Link
ytu_cyc Registered User Join Date: Oct 2010 Posts: 2	How to convert LATM to AAC? Hi All, I received some RTP Packets, and need to convert them to aac, so the media player can play. I got some information from rfc3016 and knew the RTP payload format for Audio is like: RTP Header + AduioMuxElement and AudioMuxElement was consisted of PayloadLengthInfo and PayloadMux. I think PayloadMux is what i need, right? where can i get some useful information about PayLoadLengthInfo and PayLoad Mux? I think if i know how many bytes PayloadLengthinfo have, i can calc and parser out AAC data(PyaLoadMux). am i right? sorry for my poor English. Thanks all.

6th April 2012, 12:13	#2 \| Link
nitinkumgoyal Registered User Join Date: Feb 2012 Posts: 3	hey man have u got any solution for this query. I know its very old post still, let me know if you got any idea on it. I have the RTP packets having the LATM packets and i want to depacketize them. Any code or algorithm will be very helpful. REgards Nitin

14th April 2012, 22:27	#3 \| Link
zmejce Registered User Join Date: Jan 2012 Location: Rome Posts: 51	Maybe you can play the LATM file in player such as VLC, and capture to WAV with "Sound recorder/editor" application, then you can convert the wav with ex. iTunes if you prefer apple's AAC, winamp- if you prefer FhG AAC, or Foobar + Nero AAC encoder.

15th April 2012, 10:06	#4 \| Link
nitinkumgoyal Registered User Join Date: Feb 2012 Posts: 3	thanks man. But i have the content in RTP packets. So, i can play it. I firstly need to depacketize the content from the RTP packets and then extract the latm content and only after play or convert it. So, i am actually looking for the algo of depacketization.