iOS record audio error -

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i developing ios app recording video , audio. implemented recording audio. first record video camera, if recording audio, can't record audio. used follow code. audioqueuegetproperty(mqueue, kaudioqueueproperty_streamdescription, &mrecordformat, &size);

here got error(couldn't input channel). after started app , record audio immediately, recording audio successed. recorded video camera, recording audio failed. couldn't reason. please let me know reason. in advance.

maybe can provide more code in right format. or post solution if got any.

did try solve problem av foundation framework? can access video , audio stream , put them together.


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