Undefined symbols for architecture arm64:

[IzikAlgrisi]

Hello, I followed your instructions multiple times but i cant managed to build in xcode 9 project.
Xcode 9.
Unity 2017.2.0f3 (Finally try with sample unity placeholder code)
Unity Build for devices - universal with IL2CPP.

I still get the error (no code in swift, and no code in unity for test after many times).

Undefined symbols for architecture arm64:
"_MTAudioProcessingTapGetSourceAudio", referenced from:
AVFoundationVideoPlayback::PlayerPriv::ProcessAudioTap(opaqueMTAudioProcessingTap const*, long, unsigned int, AudioBufferList*, long*, unsigned int*) in libiPhone-lib.a(AVFoundationVideoPlayback.o)
"_MTAudioProcessingTapCreate", referenced from:
-[AVFoundationMediaLoader ConfigureAudioOutput] in libiPhone-lib.a(AVFoundationVideoPlayback.o)
"_MTAudioProcessingTapGetStorage", referenced from:
-[AVFoundationMediaLoader ConfigureAudioOutput] in libiPhone-lib.a(AVFoundationVideoPlayback.o)
AVFoundationVideoPlayback::PlayerPriv::PrepareAudioTap(opaqueMTAudioProcessingTap const*, long, AudioStreamBasicDescription const*) in libiPhone-lib.a(AVFoundationVideoPlayback.o)
AVFoundationVideoPlayback::PlayerPriv::ProcessAudioTap(opaqueMTAudioProcessingTap const*, long, unsigned int, AudioBufferList*, long*, unsigned int*) in libiPhone-lib.a(AVFoundationVideoPlayback.o)
AVFoundationVideoPlayback::PlayerPriv::FinalizeAudioTap(opaqueMTAudioProcessingTap const*) in libiPhone-lib.a(AVFoundationVideoPlayback.o)
-[AVFoundationMediaLoader StopOutput] in libiPhone-lib.a(AVFoundationVideoPlayback.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Thank you for help
Itzik

[zuinqstudio]

I run into the same issue, linking with MediaToolbox.framework worked for me.

Best.