@gchiste Thank you for the valuable information! I wrote the code as advised and was able to shoot 48MP Apple ProRaw photo.

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Thank you for your reply ! Here is my code snippet. https://gist.github.com/NAOYA-MAEDA-DEV/f521f37b2e2208cdfc23da96800e93f9

Upon running the operational tests, I am able to retrieve identifier and rect, but saliencyRank, lookingAtCameraConfidence, and speakingConfidence consistently remain Optional(0.0). I am testing this with only myself as the subject. Test Result identifier: 3472BEBF-9BF3-4057-9734-37CBCFBF18F6 rect: (0.390560653609437, 0.2636592531080226, 0.17053699440298703, 0.3014791317780524) saliencyRank: Optional(0.0) lookingAtCameraConfidence: Optional(0.0) speakingConfidence: Optional(0.0)

Thank you for your response. Do the values of 'speakingConfidence' and 'lookingAtCameraConfidence' change even when there is only one subject in the video frame? Or is it necessary to have two or more people conversing? I am conducting the tests with only myself in the video frame.