Official DirectShow PushSource Desktop filter example is showing white screen instead of desktop image in GraphEdit

Question

I am learning Directshow filter development. I tried to compile and test offical example filter given at Push Source Filters Sample

In this sample code there are three filters

• CPushSourceBitmap: Single bitmap (loaded from current directory)
• CPushSourceBitmapSet: Set of bitmaps (loaded from current directory)
• CPushSourceDesktop: Copy of current desktop image (GDI only)

After compiling and building I registered filter using command

regsvr32.exe some_path\bin\x64\Debug\PushSource.dll

Then I inserted PushSource Dektop Filter into GraphEdit and rendered pin.

On playing I am seeing white screen instead of desktop view.

What I am missing?

I am using Windows 10 Home edition as OS on i3 processor.

Answer 1

Hello,
Welcome to Microsoft Q&A!

I conducted the test according to your sample, and I did not reproduce your condition, and pushsource.dll should be 32 bits. Why is yours in a 64 bit directory? Could you please check if your DLL is correct.

I used the DLL generated by the official sample, ( C:....\Win7_SDK_Samples\multimedia\directshow\filters\pushsource )

Thank you.

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