Graphedit files and Virtualdub ???

[CavalloPazzo]

Is there the possibility ot open graphedit files with Virtualdub /Avisynth (I've read that directshowsource doesn't work in avisynth for .grf files)..
I'm asking this because I've got a directshow filter that has hardware decoding function for mpeg2, but I dunno how to make it the default render for mpeg2 stream. If I could use this directshow filter while I make dvd conversion (decodes up to 250 fps) I could make much faster encoding .

[gabest]

Hw decoding is only available for mpeg2 decoders when they are connected to the overlay mixer or the video mixing renderer. If you were using avisynth then it would delete all filters back to the mpeg2 decoder and would connect his own filter at the end of the filter chain, disabling any acceleration.

[CavalloPazzo]

Hmm... not sure to have understood.
If I have 4 example
input.mpg -> demux -> decodeder -> VideoRender
avisynth will go back to the output of decoder, that is done by the hardware...this is my idea, but, as I say before, maybe I'me wrong.

[gabest]

http://msdn.microsoft.com/library/en-us/dx8_c/directx_cpp/htm/iamvideoacceleratorinterface.asp

The IAMVideoAccelerator interface enables a video decoder filter to access video accelerator functionality. The Video Mixing Renderer’s input pins support this interface, and so does pin 0 on the Overlay Mixer.

Basically an mpeg2 decoder can use hw accel through the renderer's pin after getting a pointer to the IAMVideoAccelerator interface.

[CavalloPazzo]

Ok, thanks, I've understood...
There's no way to use my hardware decoder :(