如何以编程方式设置Directshow过滤器的选项？ [英] How can i Programmatically set a Directshow Filters' options?

问题描述

我在Graphedit中有过滤器，可以更改其设置。

I have filters in Graphedit whose settings can be changed.

我有一个USB网络摄像头，可以转到其属性并以不同的大小进行流传输，但是我不确定我如何以编程方式更改这些类型的选项，而不会弹出实际的网络摄像头属性框。我想在某种意义上保持流线排列。

I have a usb webcam which i can go to its properties and make it stream at different sizes, but im not sure how i would change these types of options programmatically without popping up the actual webcam property box. I want to keep it stream lined in a sense.

.QueryFilterInfo()

不允许我访问这些类型的选项，

didn't give me any access to those types of options, and neither did

.QueryPinInfo()

有没有办法在C＃中访问这些选项？

Is there a way to get access to these options in C#?

更新：
http：/ /sourceforge.net/projects/directshownet/forums/forum/460697/topic/1319584

向您展示如何正确使用GetStreamCaps

shows you how to correctly use GetStreamCaps

推荐答案

您正在寻找的界面是 IAMStreamConfig 这样，您就可以指定fps，高度和宽度等。即使该链接适用于c ++版本，IAMStreamConfig在C＃中可用，因为它已列出此处。

The interface you're looking for is IAMStreamConfig on the source filter's output pin This lets you specify fps and height and width, etc. Even though the link is for the c++ version, IAMStreamConfig is available in C# as it is listed here.

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