DirectShowSource resizes video?

[gonzooka]

Hi there!

I am new to Avisynth and... I have a problem:

I am using virtualdub32 (1.9.11) to run avisynth script
and I want to use the MSU Framerateconverter to make slow motion for further footage. It works fine,
but it resizes the video to 640x480, and i don't know why!

DirectShowSource("x_Talschwenk_2.mp4", convertfps=true)
ConvertToYV12().MSU_FRC(2, "slow")

For compression I use x264. Audio is disabled.

i tried AviSource(video.mp4) too, but when starting conversion with virtualdub I get "avisynth read error cavistreamsynth: System exeption - Access Violation at..."

Any idea?

Thanks a lot!!!

Roman.