AmirAlis

Hi everybody
i wrote a small test application which uses VMR9 and standard graph stuff with C#. Sometimes after running the graph, I want to set alpha for the mixer,but I get an error "No such interface supported".
I would really appreciate if somebody has information about this and is able to share it with me.



Re: DirectShow Development In first creation "No such interface supported" happend

LGS

Have you looked at the vmr samples with http://DirectShowNet.SourceForge.net

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Co-author DirectShowNet





Re: DirectShow Development In first creation "No such interface supported" happend

AmirAlis

Hi
As i mention before it happend sometime, it means sometime the mixer object which i query its interface"IVMR9MixerControl" form VMR9 filter, works proper and sometime the Mixer object creation is correct but when i want to set the alpha, exception happend.

As a notice i should say that This error happend just in first time of running the application and if the first time error doesnt appear, it never happend in the other mixer alpha "mixer.setAlpha()" changes.

I also have looked on sample but i couldnt fint any important things.

Anyway thanks and waiting for new idea.






Re: DirectShow Development In first creation "No such interface supported" happend

Bowljoman

I recomend trying fsfwrap from
http://www.gdcl.co.uk/downloads.htm

It works great for alpha.





Re: DirectShow Development In first creation "No such interface supported" happend

AmirAlis

Hi Everybody
Thanks for your help, i find the answer. The problem with my test application was MTA and change it to STA completely solve the problem "my test application wrote in C#". If someone needs more information just let me know about that.

Thanks for all