How to properly export CALayer on top of AVMutableComposition with AVAssetExportSession

Question

I know this question was asked before (for example here and here) but I just can\'t figure out what I\'m doing wrong.

I have an AVMutableComposition tha

Answer 1

For anyone who has the same problem as I had I've finally found an answer. There is a property of every CALayer called geometryFlipped wich you need to set to YES just before exporting and everything will be ok. More information here.