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How can you access a webcam's zoom function?

Hello my friends,

I was wondering if there is any way to access the functionality of a webcamera to zoom in/out of a captured video stream. I'm displaying a camera stream window in my application and I would like to add a feature to zoom in/out via a slider. Is it possible using the JavaCV or do you have any other suggestions ?

Thanks a lot in advance :)

Yeehaw