OK, now I'm confused. I used video>frame rate>reconstruct from field - manual and saved the avi (direct stream copy). I tested this on a clip with 319 frames. So I thought the clip now would have less then 319 frames. But it still has 319 frames. So I repeated the process now also changing the framerate to 23.976. Now I get a clip of again 319 frames, but virtualdub says it has a 23.976 framerate. OK I understand the ammount of pictures can be the same and the framerate can change but I thought IVTC actually removed frames. Can someone please try and explain this whole pulldown system to me because I don't get it anymore.