Re: compress audio programmatically
Re: compress audio programmatically
- Subject: Re: compress audio programmatically
- From: Andrew Smith <email@hidden>
- Date: Wed, 29 Apr 2009 19:52:29 -0600
Thanks for the information. I had no idea that I could use the AudioConverter on the iPhone.
I think I can figure out how to set it up, but I'm wondering now if its possible for me to use the AudioConverter in real time, from within my recording callback. Or, do I need to wait until the file is saved, and then convert it.
It seems that AudioConverterFillComplexBuffer wants its own callback, so I'm confused on this point.
regards
Andrew Smith
On Wednesday, April 29, 2009, at 06:33PM, "William Stewart" <email@hidden> wrote:
>what kind of compression do you want?
>
>you can do any of the compression that you currently would do with
>audio queue with Extended Audio File - (which uses the audio
>converter, which you can use as well)
>
>On Apr 29, 2009, at 2:09 PM, Andrew Smith wrote:
>
>> Hello
>>
>> (iPhone platform)
>>
>> I need to do some audio analysis on the incoming audio stream, and
>> then save it to a file. I am doing this now successfully using
>> AudioQueues.
>>
>> I would like to be able to compress the audio so that the saved
>> files will not be so large. To my understanding, if I set up a
>> compressed format, then the incoming audio in the handler is already
>> compressed, so I can't analyze it. I have tried this.
>>
>> Is anyone aware of either 1) a way to use the SDK to do the
>> compression, or 2) an existing library or some code that I could
>> link in, to compress the PCM manually.
>>
>> many thanks
>> Andrew Smith
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