Unity iOS Build Error - Microphone Usage Description & BeeBuildPostprocessor

Identifying the Cause

• Added a plugin called FFmpeg Unity Bind 2.
• The project did not access the camera or microphone before, but it seems to access them after adding the plugin.

Error Log

Microphone class is used but Microphone Usage Description is empty in Player Settings.

System.Exception: Microphone class is used but Microphone Usage Description is empty in Player Settings.

   at PlayerBuildProgramLibrary.FeatureExtractor.Run(CSharpActionContext ctx, Data data) in /Users/bokken/build/output/unity/unity/Editor/IncrementalBuildPipeline/PlayerBuildProgramLibrary/FeatureExtractor.cs:line 38

*** Tundra build failed (8.57 seconds), 3421 items updated, 3688 evaluated

ExitCode: 3 Duration: 8s596ms

BuildFailedException: Player build failed: 15 errors

  at UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) [0x00213] in /Users/bokken/build/output/unity/unity/Editor/Mono/Modules/BeeBuildPostprocessor.cs:718

  at UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) [0x002a2] in <cefdead0678a425ab2e0c2483a1910f2>:0

...

(Filename: /Users/bokken/build/output/unity/unity/Editor/Mono/Modules/BeeBuildPostprocessor.cs Line: 718)

• As seen in this Unity Bug Discussion, there is a text file named “FeatureCheckList.txt” in the “Library/Bee/artifacts/MacStandalonePlayerBuildProgram/Features/” subfolder of the Unity project internal library. It seems the build fails if the Description is not provided.

Solution

• Go to Player Settings - Other Settings or search for “description” in the search bar.

• Camera Usage Description

• Microphone Usage Description

• If either of these fields is empty, fill them with any text, and the build will succeed… It’s truly an absurd bug.