iphone - How to change Audio CMSampleBuffer format(change the mSampleRate 44100.000000 to 8000.000000.) -

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i using avcaptureaudiodataoutput audio output , getting result form 

          - (void)captureoutput:(avcaptureoutput *)captureoutputdidoutputsamplebuffer:(cmsamplebufferref)samplebuffer    fromconnection:(avcaptureconnection *)connection

but want change samplebuffer audio format (cmsamplebuffergetformatdescription). please me if possible.want change msamplerate .

currently getting mediaspecific: {asbd: {msamplerate: 44100.000000mformatid: 'lpcm'mformatflags: 0xcmbytesperpacket: 2mframesperpacket: 1mbytesperframe: 2mchannelsperframe: 1mbitsperchannel: 16 }

but need change msamplerate 44100.000000 8000.000000.

take here: http://developer.apple.com/library/ios/#documentation/avfoundation/reference/avfoundationaudiosettings_constants/reference/reference.html#//apple_ref/doc/uid/tp40009937

you have setup avaudiorecorder.

hope, helps!


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