Search code examples
c#directshowdirectshow.net

How can i Programmatically set a Directshow Filters' options?

I have filters in Graphedit whose settings can be changed.

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()

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

.QueryPinInfo()

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

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

shows you how to correctly use GetStreamCaps

Solution

  • 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.