why use AviSource of CCE natively supports (DV) AVI?

[ou8thisSN]

i do a lot of video encoding from stuff recorded on my camcorder. Usually, I edit, and filter my DVI AVI video clip in Virtualdub and save it using the HuffYUV lossless codec. I want to VBR encode in CCE, must I load it with Avisynth (using the "AviSource()" command)? or can i just add the video file directly to CCE? the reason why i'm asking is because i have a dual core computer and I want to use the power of both CPUs, which CCE does use if available but Avisynth does not.

if i load the avi directly into CCE vs loading it through AviSource, are there any differences between either approaches that will adversely affect picture quality? loading it directly reduces encoding time by 350% (it goes around 2.7x rt).

on CCE's website it says that it supports both AVI and DV AVI, if this is so, then why is it recommended in guides and various threads that one should use AviSource to load an avi file into CCE?

the script i use:

#LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\DeGrainMedian.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\RemoveGrainS.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\RepairS.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\SSEToolsS.dll")
Import("C:\Program Files\AviSynth 2.5\plugins\DeHalo_alpha.avs")
Import("C:\Program Files\AviSynth 2.5\plugins\LRemoveDust.avs")
aviSource("D:\DV\test.avi")
ConvertToYUY2  #### to make it acceptable for ReInterpolate
Reinterpolate411()
ConvertToYV12(Interlaced=True)
SeparateFields()
evn=SelectEven().DeHalo_Alpha().LRemoveDust_YV12(10,1)
odd=SelectOdd().Dehalo_alpha().LRemoveDust_YV12(10,1)
Interleave(evn,odd)
weave()
ConvertToYUY2(interlaced=true) ###ReverseFieldDominance requires YUY2 or RGB
ReverseFieldDominance()

[Boulder]

Use tsp's Avisynth build. It includes the SetMTMode parameter which will make Avisynth utilize multithreading.

[ou8thisSN]

thanks i didnt know that existed, but fundamentally, does it better if i use or do not use avisource?