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Remove iPhone 4 with dual flash when shooting?

There is not much documented in the Flash API, and how to change it when using the camera, so I hope someone has already played with this.

Essentially, I want to add camera functionality to my application, but remove the dual flash (I only need one flash with LED backlight).

Is it possible?

Edit: I saw this functionality implemented in the Google Goggles app and the Instagram app (not on a single flash, but on custom flash controls). Any good resources on how I can reproduce their functionality?

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The camera API does not provide any publicly available features for this. So the short answer is no.

But you have control over the Flash API. So you can turn off the flash in the camera and manually light it when shooting?

I did not do this, but I think you should provide your own camera control user interface and control the flash when you press the shot button.

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