Can't get any video preview with AVCaptureSession

Question

I set up my AVCaptureSessionlike so:

AVCaptureSession *newSession = [[AVCaptureSession alloc] init];
AVCaptureDevice *camera = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

NSError *error = nil;

AVCaptureDeviceInput *newInput = [[AVCaptureDeviceInput alloc] initWithDevice:camera error:&error];


if(error) {
    NSLog([error localizedDescription]);

}

AVCaptureMovieFileOutput *newOutput = [[AVCaptureMovieFileOutput alloc] init];


if([newSession canAddInput:newInput])
    [newSession addInput:newInput];
if ([newSession canAddOutput:newOutput])
    [newSession addOutput:newOutput];

[self setSession:newSession];
[self setInput:newInput];
[self setOutput:newOutput];

And then I added a preview layer to my view:

AVCaptureVideoPreviewLayer *layer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[recorder session]];

[layer setBounds:[recordingView bounds]];
[layer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

[[recordingView layer] insertSublayer:layer above:[recordingView layer]];

But I wont get any preview.

I'm on IOS 5 with an iPod Touch 4th Gen.

Thanks.

Answer 1

First of all, how is your recordingView defined? Second,

[[recordingView layer] insertSublayer:layer above:[recordingView layer]];

makes no sense. (you are trying to add a layer above the own layer inside the own layer ->duh?) Try [recordingView.layer addSublayer:layer]; instead.

Your posted project in the comments uses zeroing weak pointers. mark your properties strong instead and everything works.