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QtWS25 Last Chance

Do anyone know about QImageCapture request id means?

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HKTse

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I am studying how to capture an image from an uvc camera. It has a hardware still image trigger button. I don't know how to do it. I study the qimagecapture class and find no information about this and noticed a request id is used inside a bunch of signals. Can anyone explain these? Thanks a lot.
I want to use it in macos.
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