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How to extract screenshot from video in iPhone SDK?

I would like to take an MPEG screen shot recorded using an iPhone camera at set intervals.

I have seen several ways to do this; namely, compiling and using FFmpeg ( Using the FFMPEG library with the iPhone SDK for encoding video ), however, it seems quite difficult to run LGPL ( http://ffmpeg.org/legal.html ) for commercial use.

This contract term pretty much makes it useless to us:

Q : Is it absolutely right to include the entire core of FFmpeg in your own commercial product?

A . You may have a problem. There have been cases where companies have used FFmpeg in their products. These companies have found that as soon as you start trying to make money from patented technologies, patent holders will come after their license fees. It is noteworthy that MPEG LA is vigilant and assiduous in assembling for MPEG-related technologies.

Is there another way? - Or just by accessing the MPEG rendering level, am I going to "make money from proprietary technologies"?

As usual - any help on this subject would be greatly appreciated.

Hooray!

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, - , iOS 3.2... , , . MPMoviePlayerController

UIImage *aThumbnail = [player thumbnailImageAtTime:timeCode timeOption:MPMovieTimeOptionExact];

//timeCode is a time within de video length, for example: 3.12 seconds.
//player is the MPMoviePlayerController object.
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, .

/ Apple. . , , .

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