When TUAW blogger Erica Sadun and I found out that the iPad 2 was going to feature video mirroring through the various adapters that Apple and others sell, we were ecstatic. For Erica, this would hopefully provide a quick way to capture movies of demonstrations of some of her software solutions, while I was hoping to be able to grab iPad video on my Mac for the many app demos that I do on TUAW TV Live.
Regretfully, our joy was short-lived. We've both tried with various cables and adapters, and to this point, have had no luck. Both Erica and I own inexpensive video input devices for our Macs; she has the Elgato Video Capture (US$99.95) while I have the functionally equivalent Geniatech iGrabber ($34.99). Both devices take composite video signals from a device -- usually an old VHS videocassette recorder or camcorder -- and capture the resulting video using proprietary software on the Mac.
Since Apple sells a Composite AV Cable for iOS devices, we both thought that it would be possible to blast video out from the iPad 2 through that cable to the Mac composite video capture tools, which would let us achieve our respective goals for capturing iPad 2 videos. Unfortunately, neither of us was able to get this to work,
and we're not exactly sure why. Apple's spec page indicates the composite output isn't supported for mirroring.