AVCaptureVideoDataOutput stops zooming while AVCaptureVideoPreviewLayer continues — physical wide / ultra-wide / telephoto only

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We use a single AVCaptureSession with AVCaptureVideoPreviewLayer and AVCaptureVideoDataOutput (preview-sized buffers, BGRA).

When we increase videoZoomFactor, beyond a certain zoom level the image from AVCaptureVideoDataOutput no longer zooms further, while AVCaptureVideoPreviewLayer continues to zoom with the same zoom control. The preview and the video-data output therefore diverge.

This behavior appears when the active camera is a physical lens device — wide, ultra-wide, or telephoto (e.g. builtInWideAngleCamera, builtInUltraWideCamera, builtInTelephotoCamera, or similar). It does not appear when the active input is a virtual / multi-camera (e.g. triple camera, dual-wide, or other system multi-camera).

Are there known conditions under which this mismatch between preview and video-data output is expected?

Thank you.

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DTS Engineer OP

Apple

59m

Hello m131,

Thanks for raising this issue. I don't believe this discrepancy between AVCaptureVideoDataOutput and AVCaptureVideoPreviewLayer is expected. This may be worth filing a bug report to via Feedback Assistant. Once you open the bug report, please post the FB number here for my reference.

If you have any questions about filing a bug report, take a look at Bug Reporting: How and Why?

Thanks for reporting,

Richard Yeh  Developer Technical Support

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