Exporting with NERO VISION



I have problems when exporting video files with NERO Vision release 3.

Premise is that for better editing I’d like to export video files - originally coming form DVD camera on mini DVD disk and hence in mpeg 2 type format or Vob format - in DV format. This because editing from mpeg 2 type files takes to not very good appearance, at least in my knowlege.

Import from mini DVD to hard disk via Nero Vision is perfect, bat the exporting to DV blocks when the exported file reaches 4.000.000 bit approx even if hard disc has full capacity to receive more and more.

Is there any setting to be done for extend the eported file dimensions or else?
Thanks for any suggestion