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.

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