[4eyes] Developers now can use private API for screen capture on iPhone, says Apple

[Taehee Lee]

Hi Jonathan,

What do you mean by a subimage?
If you mean a sub region of the whole screen image, yes, you can capture a video feed like 30 fps. Once you separate the frame to (1) the region to be captured, and (2) the region to be rendered with overlay view, you can consider you have a video feed of 320x240 resolution. This is obviously usable for a prototyping, but I was looking for something to use the full screen with full frame rate video feed.

I just tried to use takePicture() function to capture camera images, but it seems to slow, like 2~3 fps. Maybe it is because takePicture() is designed to capture still camera images, with high resolution of ~1500x2000.

- Taehee
 
On Dec 16, 2009, at 10:18 AM, Jonathan Ventura wrote:

> Is it possible to take a subimage to get the camera frame then?
> 
> -Jon
> 
> On Wed, Dec 16, 2009 at 7:39 AM, Taehee Lee <taehee at cs.ucsb.edu> wrote:
> Hi all, I've been testing to capture screen iPhone 3GS using UIGetScreenImage(),
> and I was just able to capture the whole screen that includes the camera's overlay view. Does anyone know how to capture only the camera image without the overlaid graphics? (I tried to use CALayer in the UIView hierarchy, but they seem to hid the camera feed inside.
> 
> So I'm thinking to turn to Android if the live feed capturing is not successful on iPhone. Does any one has some comment or suggestion?
> 
> Cheers,
> 
> Taehee
> 
> On Wed, Dec 16, 2009 at 2:23 AM, Tobias Hollerer <holl at cs.ucsb.edu> wrote:
> 
> http://www.tuaw.com/2009/12/15/apple-relents-and-is-now-allowing-uigetscreenimage-for-app-st/
> 
> 
> -- 
> Tobias Hollerer
> Associate Professor, Department of Computer Science
> University of California, Santa Barbara, CA 93106-5110
> 
> holl at cs.ucsb.edu, Office: (805)893-8759, Fax: (805)893-8553
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> 
> -- 
> Taehee Lee
> 
> PhD Student
> University of California, Los Angeles
> Tel: 213.435.9735
> 
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> 
> -- 
> Jonathan Ventura
> Ph.D. Candidate
> 
> Department of Computer Science
> University of California
> Santa Barbara, CA 93106-5110
> 
> Office: (805) 893 2614
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