AVCaptureSystemZoomSlider has a factor that I can't get anywhere.

Question

megabits OP

Created Sep ’24

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As you can see, the value shown in the AVCaptureSystemZoomSlider is not the same as the raw camera zoom factor.

I tried to calculate this value, and it seems it's 0.8. (5-1)*0.8=4.2-1 in this image.

It seems this factor only applies to the default wide-angle camera. And I can't get this value from anywhere. (It's not displayVideoZoomFactorMultiplier btw, I checked that.)

What is it?

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Answer 1

devdevdev OP

Sep ’24

I observe the same issue. The problem only occurs with the wide angle camera. The systemRecommendedVideoZoomRange is 1-10, but the slider shows 1-5x, despite the displayVideoZoomFactorMultiplier being 1. Great that you could figure out the formula, but I guess this is an issue in iOS that will (hopefully) be fixed soon.

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