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IAMCameraControl interface problem raises exception

Hello,

I am the developer of an app that controls the movement of a camera. Using DirectShow and IAMCameraControl I was able to set camera properties as Pan, Tilt and Zoom without any problem.

The problem raises after KB5003173 Windows update. After that update I have problems modifying Zoom property. After call "set" function, the camera set the zoom to the desired position, but the function gets locked 5 seconds until "System.Runtime.InteropServices.COMException" exception is raised with HRESULT: 0x80070079. This is very frustrating for the app users because move the camera to the desired position now takes A LOT of time...

It is important to remark that setting Pan and Tilt properties executes almost instantly and don't raise any exception.


I don't know how to solve this problem because it is part of the Windows SDK... Any help?

Thanks



windows-10-generalwindows-api
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Do IOCTL calls have the same problem? According to Error 0x80070079 and The Question, perhaps the problem is caused by Camera Driver Corruption. Try uninstall and then install the driver.


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Hello again,

First of all, thanks for your answer.

I reinstalled the driver serveral times on different computers and the problem persists.

Nevertheless, I realized that a very recent camera firmware update finally solved the problem! I think that KB5003173 Windows update causes some kind of incompatibility that the camera manufacturer has solved on the latest firmware.

Once again, thanks for your help.

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