Symbol not found: _kVTDecompressionPropertyKey_Rea

问题:

I am getting crash at launch time, with the following terms in the

console.

dyld: Symbol not found: _kVTDecompressionPropertyKey_RealTime

Referenced from: /var/mobile/Applications/25A09982-788D-4847-93D9-C6420B0B5628/Makeit.app/Makeit

Expectedin:/System/Library/Frameworks/VideoToolbox.framework/VideoToolbox in /var/mobile/Applications/25A09982-788D-4847-93D9C6420B0B5628/Makeit.app/Makeit

can any one tell how to fix this. I already checked for VideoToolbox framework, its added in my project also.

my only suspect is, in my app i am using Quickblox WebRTC framework which is to be linked for iOS 9.0 but my app deployment target is 7.1.Is this any problem for this kind of error.Suggest me how to resolve this.

回答1:

VideoToolbox is only available from iOS 8+. You can set it to optional: click on it in project navigator, in the right panel, where Target membership is, select Optional instead of required.

Please keep in mind that you will not be able to use h264 codec from now on.