ios视频图片接口总结

总类：AVCaptureSession
https://developer.apple.com/library/content/samplecode/AVCam/Introduction/Intro.html
AVCaptureSession *captureSession = [[AVCaptureSession alloc] init];

AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];

NSError *error = nil;

AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error];

if (audioInput) {

    [captureSession addInput:audioInput];

}

else {

    // Handle the failure.
}
http://www.cnblogs.com/liangzhimy/archive/2012/10/26/2740905.html