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progressive pal to ntsc conversion

Hi - for all those who helped me with my vhs capture problem last week - thanks, everything worked out great - and unfortunately i'm back with another. I've been trying to work on this but could maybe use some suggestions.

My next project involves converting a progressive PAL source to NTSC. I know the preferred option would be to have a DVD player that does both and not convert at all but for this particular project it's my preference to do the PAL>NTSC.

So, I've tried numerous methods but nothing seems to come out exactly right. The source is progressive PAL AVI (720x544, 25 FPS). My method thus far has been this:

a) Use AVS2DVD to split the AVI into mpeg-2 streams, outputting still as PAL but changing the size to 720x480
b) Use dgpulldown on the resulting m2v file to then change the framerate from 25 to 29.97

The result of (a) is interlaced, and obviously so is (b) and I'm assuming that there's no other way to do this than to have the end result interlaced (other than using a method which just copies frames). Is there something else I should be doing, and/or should I be IVTC from 25 FPS to 23.976 and then running dgpulldown? I have tried to IVTC in Vdub but for some reason that takes the framerate down to 20 FPS (I'm not sure if that fact might be helpful in deciphering what I'm doing wrong?)

Anyway, if someone has any ideas or new methods I could try, I'm all ears. The help I got last week from this board helped restore my sanity (thanks especially sanlyn & manano). I'm sorry to go back to the well so soon after getting bailed out by you guys last week but this is obviously not my area of expertise and I'm very interested in hearing suggestions - thanks!

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