i don't know about vdub(mod) but avisynth has this function. just use the decomb plugin and add the function seperatefields() ... this will leave you with a framerate of 50 for PAL and almost 60 for NTSC and as the function says seperate the fields... i hope this is what you are looking for steVe
--------------------- Kto jaką drogę obrał taką ma, ważne kto rade da.
Close...I found SeperateFields, and while that does get them in order, I can't abide the one-row jitter it leaves behind. So at this point I now need a way to translate the image by one row on every other frame.
For Avisynth: Bob(). For VirtualDub: My SmartBob() filter. See website below. SmoothDeinterlace() gives less flutter and shimmer, but is much slower than Bob() and SmartBob().