AVCaptureVideoOrientation landscape modes result in upside down still images - iphone

Question

Im using AVCaptureSession for taking pictures and store pictures to album. When i click the button it takes the snapshot and store to album. But when i use landscape mode, then click the button it stores landscape modes result in upside down still images.
code:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self setCaptureSession:[[AVCaptureSession alloc] init]];
[self addVideoInputFrontCamera:NO]; // set to YES for Front Camera, No for Back camera
[self addStillImageOutput];
[self setPreviewLayer:[[AVCaptureVideoPreviewLayer alloc] initWithSession:[self captureSession]] ];
[[self previewLayer] setVideoGravity:AVLayerVideoGravityResizeAspectFill];
CGRect layerRect = [[[self view] layer] bounds];
[[self previewLayer]setBounds:layerRect];
[[self previewLayer] setPosition:CGPointMake(CGRectGetMidX(layerRect),CGRectGetMidY(layerRect))];
[[[self view] layer] addSublayer:[self previewLayer]];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(saveImageToPhotoAlbum) name:kImageCapturedSuccessfully object:nil];
[[self captureSession] startRunning];
camera=[UIButton buttonWithType:UIButtonTypeCustom];
[camera setImage:[UIImage imageNamed:#"button.png"] forState:UIControlStateNormal];
[camera setFrame:CGRectMake(150, 10, 40, 30)];
[camera addTarget:self action:#selector(takephoto:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:camera];
}
Button for taking picture:
-(void)takephoto:(id)sender{
[self captureStillImage];
}
- (void)captureStillImage
{
AVCaptureConnection *videoConnection = nil;
for (AVCaptureConnection *connection in [[self stillImageOutput] connections]) {
for (AVCaptureInputPort *port in [connection inputPorts]) {
if ([[port mediaType] isEqual:AVMediaTypeVideo]) {
videoConnection = connection;
break;
}
}
if (videoConnection) {
break;
}
}
NSLog(#"about to request a capture from: %#", [self stillImageOutput]);
[[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:videoConnection
completionHandler:^(CMSampleBufferRef imageSampleBuffer, NSError *error) {
CFDictionaryRef exifAttachments = CMGetAttachment(imageSampleBuffer, kCGImagePropertyExifDictionary, NULL);
if (exifAttachments) {
NSLog(#"attachements: %#", exifAttachments);
} else {
NSLog(#"no attachments");
}
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
UIImage *image = [[UIImage alloc] initWithData:imageData];
[self setStillImage:image];
// [image release];
[[NSNotificationCenter defaultCenter] postNotificationName:kImageCapturedSuccessfully object:nil];
}];
}

Answer 1

You need to set the videoConnection's videoOrientation property based on the orientation of the device. Do this in captureStillImage, after you have set the AVCaptureConnection.
UIDeviceOrientation deviceOrientation =
[[UIDevice currentDevice] orientation];
AVCaptureVideoOrientation avcaptureOrientation;
if ( deviceOrientation == UIDeviceOrientationLandscapeLeft )
avcaptureOrientation = AVCaptureVideoOrientationLandscapeRight;
else if ( deviceOrientation == UIDeviceOrientationLandscapeRight )
avcaptureOrientation = AVCaptureVideoOrientationLandscapeLeft;
[videoConnection setVideoOrientation:avcaptureOrientation];