I want to know if premiere directly copies the DV data when rendering a project back to a DV file or if it recompresses the data (and thereby killing the losslessness of DV editing). Here's the background:

I edited some DV footage in premiere but since it's from a low-light situation I want to filter it a little with Virtualdub's temporal filter (and add a little contrast). I figured out how to use the old AVIsynth to frameserve to virtualdub, but that's no good because the whole chain is way too resource heavy to frameserve again to CCE. (I know the unofficial versions can use virtualdub filters but I want to take premiere out of the picture).

Anyway, when I'm saving the project back out to a DV file it's only getting 7.5fps on my Athlon 1.33GHz and that seems low for just copying data (since at 3.4MB/s I should be able to get up to 90fps). It shows about 25% of the cpu going to rendering and 75% to compressing/writing.

I don't want to degrade the data at all by re-encoding, so is there a way to prevent this? Or should I just live with it repacking the data with the MS DV codec and maybe loose some quality?