OpenCV iOS - Camera Selection

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Hi everyone,

Apologies if this has been answered already, as I did try to search but couldn't find a relevant thread.

Working on a PPG-based project using OpenCV iOS. Has been fine but noticed a particular issue with the iPhone 8S in particular, a problem that may be easily solved if we can select the secondary back camera.

However we can't seem to find if there is an option to select which cameras to use in OpenCV, if possible.