DirectShowSource problem vs. AviSource

stephanV Yes you are correct DivX is only decoding the YV12 output from Avisynth How do I look at directshow graph ? Do I need to use GraphEdit for it ?

OK, here is the graph and it clearly shows there is a Color Space Converter. But what is it ? Where do I find the name of this file or codec that's doing this. If I click on properties it says "The requested property page could not be displayed"

I think it is more useful to look at the graph of your original Huffyuv file, as that is the graph that AVIsynth uses...