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Editorial Team
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Asked: 2026-05-17T16:27:46+00:00

I’m currently developing an app that has a camera functionality, with a custom camera

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I’m currently developing an app that has a camera functionality, with a custom camera screen, featuring a preview screen and an overlay.

I’m using the AVFoundation classes and methods as per the eradication of UIScreenCapture.

The problem I have is that the preview data I get from AVCaptureSession is too zoomed in. If i take a picture with that screen, and another with the iPhone’s default camera app, without moving the iPhone, the difference in zoom is far too much.

I need the zoom of my app to be the same as is default for iPhone camera app.

I’ve tried changing the AVCaptureVideoPreviewLayer.videoGravity, to any of it’s 3 possible values, to no avail.

Please, any leads on this problem are truly appreciated.

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1 Answer

  1. Editorial Team

    Turned out to be a resolution issue.
    It was fixed by using 

    myCaptureSession.sessionPreset = AVCaptureSessionPreset640x480

    Note that iPhone 3g does not support that, so you have to ask wheter the device supports it

    [[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo] supportsAvCaptureSessionPreset:AVCaptureSessionPreset640x480]
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