avfoundation « image « iPhone iPad Media Q&A

1. dyld: Library not loaded: AVFoundation.framework Reason: image not found    stackoverflow.com

How do I fix this?

dyld: Library not loaded: /System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation   Referenced from: /Users/[...]/Library/Application Support/iPhone Simulator/User/Applications/[...]/TestGame.app/TestGame   Reason: image not found

2. iPhone AVFoundation image EXIF orientation    stackoverflow.com

I'm using AVFoundation to control the camera in my app and it's working perfectly... up til now. The images are saved into the library with no problems and all look perfect but ...

3. AVFoundation Images coming in unusably dark    stackoverflow.com

I am using AVFoundation to take a picture automatically, but the pictures are coming out very dark. The back camera is ok if you use the flash on an iPhone 4, ...

4. AVFoundation buffer comparison to a saved image    stackoverflow.com

I am a long time reader, first time poster on StackOverflow, and must say it has been a great source of knowledge for me. I am trying to get to know the ...

5. How can I do fast image processing from the iPhone camera?    stackoverflow.com

I am trying to write an iPhone application which will do some real-time camera image processing. I used the example presented in the AVFoundation docs as a starting point: setting ...

6. AVAssetImageGenerator provides images rotated    stackoverflow.com

When obtaining a UIImage of a video via AVAssetImageGenerator, I'm getting back images rotated (well, technically they're not) when the video is shot in portrait orientation. How can I tell ...

7. Cropping image captured by AVCaptureSession    stackoverflow.com

I'm writing an iPhone App which uses AVFoundation to take a photo and crop it. The App is similar to a QR code reader: It uses a AVCaptureVideoPreviewLayer with an overlay. The overlay ...

8. AVCamDemo: completionHandler code not hit    stackoverflow.com

I am streamlining the AVCamDemo project so that I can experiment with capturing only still images. Below is the new code for captureStillImage() method:

- (void) captureStillImage
{
    AVCaptureConnection *stillImageConnection = ...

9. CVPixelBufferLockBaseAddress why? Capture still image using AVFoundation    stackoverflow.com

I'm writing an iPhone app that creates still images from the camera using AVFoundation. Reading the programming guide I've found a code that does almost I need to do, so I'm trying ...

10. Continuous capture image with AVFoudation in iPhone    stackoverflow.com

Now, I can capture an image using avfoundation , like below. But how should I do to capture images (e.g. 20 or 30 images) continuously?

[stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error)
 ...

11. Why does capturing images with AVFoundation give me 480x640 images when the preset is 640x480?    stackoverflow.com

I have some pretty basic code to capture a still image using AVFoundation.

AVCaptureDeviceInput *newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backFacingCamera] error:nil];

    AVCaptureStillImageOutput *newStillImageOutput = [[AVCaptureStillImageOutput alloc] init];

  ...

12. Use avfoundation to capture image, but can not capture too quickly    stackoverflow.com

I use avfoundation to capture images, but I can not capture too quickly(I set interval time to 0.1s). It says " NULL sample buffer". What is the problem? Thank you.

[stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection ...

13. AVFoundation crop captured still image according to the preview aspect ratio    stackoverflow.com

My question is mostly similar to this one: Cropping image captured by AVCaptureSession I have an application which uses AVFoundation for capturing still images. My AVCaptureVideoPreviewLayer has AVLayerVideoGravityResizeAspectFill video gravity thus making ...

14. Faster still image capture with AVFoundation    stackoverflow.com

I use some code to capture still images from the camera. With my iPad2, it grabs 30 frames per second without any trouble, but with the iPhone4 only around 4 fps ...

15. AVURLAsset and AVAssetImageGenerator return null images    stackoverflow.com

I am trying to get a thumbnail from a .mov file that I captured from the iphone camera. I currently have the movie saved in the documents portion of the app. ...