iOS process audio from http streamed mpeg4

[whitehexagon]

Can anyone help if this is even possible on the iPhone, and where to start please.

*connection to the mpeg4 stream (being streamed continuously over http)
*someway to filter out only the audio
*some way to access the frequency / volume levels

Is NSURLConnection a good approach to access the stream?
Are there any API's for assembling/processing the stream/extracting audio?
any pointers on how to get started would be much appreciated.

 

[kainjow]

Have a look through the Core Audio documentation. I'm not sure if it can do #1 and #2, but #3 should be doable.

 

[whitehexagon]

thanks, that helped me stumble over the following blog, which seems to be a step in the right direction.

http://cocoawithlove.com/2010/03/streaming-mp3aac-audio-again.html