Error With Video Capture Script

Unity Engine
1

Hello,

I upgraded a project from Unity 5.6.2 to 5.6.4 and now it no longer builds. I was using Unity - Scripting API: VideoCapture as a reference to do video capture in my project. However when I try to build I get the error:

InvalidOperationException: Operation is not valid due to the current state of the object
System.Linq.Enumerable.First[Resolution] (IEnumerable`1 source)

From the line:

Resolution cameraResolution = VideoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();

Which is directly from the Unity documentation. Can I get some help with what is going wrong here?

2

That sounds really odd that is the line you are getting the error. Can you try deleting your library folder to see if that fixes your issue?

3

I tried deleting the library folder but I am still getting the same issue. Looking at it again I am getting a number of other errors as well so perhaps I am doing something else wrong.

Ex. Assets\HoloToolkit-Examples\SharingWithUNET\Scripts\GenericNetworkTransmitter.cs(114,57): error CS0246: The type or namespace name ‘StreamSocketListener’ could not be found (are you missing a using directive or an assembly reference?)

There are a number of these errors of this format.

Edit: This might be an issue with my installation. I am going to try to reinstall and see if that fixes things.

4

Okay reinstalling did not help. I don’t know what is going wrong here.

5

Do you run into any of these issues with a fresh project, or does this repro just from using HoloToolkit?

6

I just tried setting up a new project and I run into a different error when I attempt to build.

FileNotFoundException: Could not find rc.exe in the Windows SDK directory!
PostProcessUAP.GetResourceCompilerPath () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessUAP.cs:157)
PostProcessWinRT.CreateWindowsResourceFile (System.String targetDirectory) (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:787)
PostProcessWinRT.CreateWindowsResourceFile () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:798)
PostProcessWinRT.Process () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:208)
UnityEditor.WSA.BuildPostprocessor.DoPostProcess (BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:155)
UnityEditor.WSA.BuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:162)
UnityEditor.HostView:OnGUI()

7

Which windows SDK are you using? Do you have rc.exe in “C:\Program Files (x86)\Windows Kits\10\bin\x64” or “C:\Program Files (x86)\Windows Kits\10\bin<SDK_VERSION>\x64” folders?

8

I am not sure about SDK version but I am using Windows 10 Version 1607 OS Build 14393.1480.

I do not see a bin folder in that directory. Screenshot: Imgur: The magic of the Internet

9

I think my build environment was changed and now I’m missing some necessary files for HoloLens development which might be the problem. I am going to reinstall the tools and see if that fixes everything.

10

Yeah looks like you’re missing a Windows SDK. You can download it here: Windows SDK - Windows app development | Microsoft Developer

11

Reinstalled VS with UWP enabled and that seemed to fix my issues. Thanks for the help.