DVD playback by definition doubles the line (deinterlaces) and output as VGA progressive. If you're looking for a way to deinterlace external DVD, VHS, or TV player by Svideo then Dscaler (free software download) and Svideo capture card like the Iomagic PVR (Pinnacle TV) and other Brooktree based cards (Zoltrix TV, WinTV, ATI TV Wonder--not All-In-Wonder, etc.) should work well.
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