DirectShow - How to rotate web cam preview video?

Question

I am using DirectShow ICaptureGraphBuilder2, IVideoWIndow & IGraphBuilder to preview web cam video into specified window. I am successful to preview web cam view. Now, I want to rotate this web cam preview by 90 degree. Explored web and people suggest to use transform filter but I didn't exactly find how to do it. Can somebody help ?

Jehiel

Answer 1

MSDN describes it in Writing Transform Filters, and you will find some related discussions:

• I want to Rotate a video with some angle
• Need help on video in portrait mode

The supposed transform filter needs to rearrange pixels in the data buffer, and also indicate the rotation on the media type.

Paletot

Thanks Roman. Can you point to any code ? will be more helpful. – Jehiel

Why not? There is Rotate Filter on Video Processing Project at SourceForge. – Paletot