A: 

Both of these use CoreSurface which is a private API. You can google it for more information. In iOS 4, there are new API's to get direct frame access from the camera.

Elfred  2010-06-29 02:49:13
Specifically the AVFoundation framework.
paxswill  2010-06-29 02:57:44
Thank you for your great information Elfred. I'll google it!
SUKIYAKI  2010-06-29 08:39:05

related questions

How do we get arround Apple's decission to skip sms templates for iPhone?
iPhone App Crashing - Error Question
Can I write native iPhone apps using Python
Does the Iphone 1/2 have a compass inside?
How do you beta test an iphone app?
Is it just the iPhone simulator that is restricted to intel only Mac's?
iPhone App Minus App Store?
Deleting messages from Exchange IMAP mailbox on iPhone
Is there a multiplatform framework for developing iPhone / Android applications?
How can I launch the Google Maps iPhone application from within my own native application?
Tips for a successful AppStore submission?
iPhone app that access the Core Location framework over web
Virtual Mac?
What's a good machine for iPhone development?
How can I develop for iPhone using a Windows development machine?
Recommended iPhone Development Resources
Best Wiki for Mobile Users
How to programmatically send SMS on the iPhone?
iPhone - Exchange Calendars in Public Folders
iPhone web applications, templates, frameworks?
Understanding reference counting with Cocoa / Objective C
How-to articles for iPhone development, Objective-C
What are the correct pixel dimensions for an apple-touch-icon?
How do I give my web sites an icon for iPhone?
iPhone app in landscape mode