DirectShow-如何旋转网络摄像头预览视频？ [英] DirectShow - How to rotate web cam preview video?

问题描述

我正在使用DirectShow ICaptureGraphBuilder2，IVideoWIndow& IGraphBuilder可以将网络摄像头视频预览到指定窗口中。
我可以成功预览网络摄像头视图。现在，我想将此网络摄像头预览旋转90度。浏览过网络的人们建议使用变换过滤器，但我并没有确切地找到方法。有人可以帮忙吗？

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 ?

推荐答案

MSDN在编写转换过滤器，您会发现一些相关的讨论：

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

• 我要旋转某个角度的视频


• 在纵向模式下需要视频帮助

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

假定的转换过滤器需要重新排列数据缓冲区中的像素，并指示媒体类型的旋转。

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

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