Time format in iPhone Photos.sqlite

I copied pictures from my iPod Touch into my Mac using iPhone Explorer, but in doing so their timestamps got modified. I am not an iOS programmer, but I managed to get to the data in Photos.sqlite

In User/Media/PhotoData/Photos.sqlite on my iPod Touch, I see the keys captureTime开发者_如何学Go and recordModDate. The titles seem self explanatory. However, how do I translate their values into a human-readable format? e.g. 307867854.0 (captureTime) and 330936323.440785 (recordModDate). It doesn't seem to be in epoch.

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Your times are the number of seconds since January 1, 2001.

The code to display the date would be something like:

NSDate *date = [[NSDate alloc] initWithTimeIntervalSinceReferenceDate: 330936323.440785];
NSLog( @"%@", date );

prints 2011-06-28 06:45:23 +0000