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Re: how turn off camera after using CurrentImage?

• To: mathgroup at smc.vnet.net
• Subject: [mg123995] Re: how turn off camera after using CurrentImage?
• From: Szabolcs <szhorvat at gmail.com>
• Date: Wed, 4 Jan 2012 05:04:32 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <jdul5s$jnf$1@smc.vnet.net>
• Reply-to: comp.soft-sys.math.mathematica at googlegroups.com

On Tuesday, 3 January 2012 11:27:08 UTC+1, Murray Eisenberg  wrote:
> On an iMac under OS X 10.6.8 (Snow Leopard), in Mathematica 8.0.4, I 
> evaluated CurrentImage[]. That automatically turned on the built-in 
> "FaceTime HD" camera.
> 
> Is there some programmatic way from within Mathematica to turn the 
> camera off?
> 
> And if not -- OT: is there some simple way to do this in OS X? (Other 
> than open and then quit the FaceTime app.)
> 

A little digging around shows that these can stop and start the camera:

IMAQ`StartCamera[]
IMAQ`StopCamera[]

A big warning here to anyone reading this on MathGroup:

These are internal functions probably not meant to be used by end users, so they might easily break between versions, or might give you something unexpected.  I just digged them out from CurrentImage[] using Trace[].