How to use AVDepthData

Hello, how is going?

So I almost got the meta data working, accounting to the document I have a dew question here: is that attachment referring to the CFDictionary ?

The for the auxData, I got an error message like cant find deothData in scope? should I create this depth data from the TIF file?

Thx

CGImageDestinationAddImage(cgImageDestination, renderedCGImage, attachments)        
var auxDataType :NSString? 
let auxData = depthData.dictionaryRepresentation(forAuxiliaryDataType: &auxDataType)  
How to use AVDepthData
 
 
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