MonoTouch AVFoundation Puzzle

I'm new with MonoTouch. I want to pick frames from video (I found this page http://developer.apple.com/library/ios/#qa/qa2010/qa1702.html), but it's written in Object-C, I've never l开发者_运维问答earned that. Can Someone give me a MonoTouch sample. Appreciated.

Today I wrote a sample, but the APIs in MonoTouch 4.0 were not very good, they were fairly hard to use. We made some changes to MonoTouch today, and the next alpha release in the next few days will have these changes in.

The sample code has been ported and lives now in http://github.com/migueldeicaza/monotouch-samples/av-capture-frames module most of the code is in Main.cs