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Re: Generating AAC audio for broadcasting over RTP
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Re: Generating AAC audio for broadcasting over RTP


  • Subject: Re: Generating AAC audio for broadcasting over RTP
  • From: William Stewart <email@hidden>
  • Date: Fri, 3 Mar 2006 11:03:17 -0800

There's no difference - all that the SoundMgr code is doing is calling through to the AAC codec - so the SM's "MPEG-4" audio format is AAC.

I'm surprised though that these packets would be different (I mean, basically they should be the same!) I've cc'd Eric who can help with these details.

Bill


On 03/03/2006, at 7:41 AM, Dirk Vangestel wrote:

I'm trying to broadcast audio over RTP. If I use SoundManager to compress the audio to the MPEG-4 audio format, I can successfully stream and play the audio using the aac-hbr format in my SDP file.
However, if I capture and compress the audio using CoreAudio APIs, the option for MPEG-4 audio is not available. Instead, I get the AAC option. This option seems to generate a different kind of audio packets though, which I can't seem to play successfully.
There doesn't seem to be anything wrong with the base code. When I write the compressed audio data into a Quicktime file, it plays just fine... I just don't know what the difference is between the old MPEG-4 audio and the new AAC format. Can anyone help me?


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References: 
 >Generating AAC audio for broadcasting over RTP (From: "Dirk Vangestel" <email@hidden>)

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