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Editorial Team
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Asked: 2026-05-22T02:57:58+00:00

I usually build filter graphs with GraphEdit. I can add my filter correctly. This

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I usually build filter graphs with GraphEdit.

I can add my filter correctly. This filter comes from a Driver made from WinDDK. It has one input pin and one output pin.

When I try to do it programatically using this tutorial, the filter loads, but it has no pins. Pins enumeration fails and when I connect to my remote graph with graphedit, it doesn’t show any pins.

How can I make sure that my driver exports the correct DirectShow filter?

What is the fundamental difference between the MSDN tutorial about creating DirectShow filters and GraphEdit “Insert Filter” function?

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1 Answer

  1. Editorial Team

    If I understand you correctly, you have created your own source filter?

    Point to double check:

    • Did you implement GetPinCount, GetPin, FindPin correctly?
    • Did you call IncrementPinVersion after adding/creating each pin?

    I am not familiar with WinDDK development, but can you put breakpoints in those methods to see what is happening?

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