AVAssetExportSession in ios 10 not working for iPhone 7

Question

When I am blending two videos with AVAssetExportSession in ios 9 its working perfectly. but when i blend with AVAssetExportSession in iOS 10, it in not working. Please help

Answer 1

AVAssetExportSession can be NULL, so need to check NULL before work on it https://developer.apple.com/library/content/qa/qa1730/_index.html