Fast/Slow Motion, Motion Comp?

[Mustachio]

Basically, what I am trying to do, is speed up/slow down a clip but still keep the same framerate and same smoothness of motion as the original.

A little background

I am working with a NTSC DV capture, using mvbob to bob the video to 59.94 (eventuall i might need to interlace back for further processing, but i think i have that under control)

What i thought would be the best was to do a motion compensated type thing, using the mvbob package (thank you guys for that) and then use mvfps to scale the video to the speed up or slow down factor, then use assumefps to get the video to playback at the original 59.94.

This is very slow, and im not quite sure if this is the best way to be doing this so i thought i would ask you experts here for opinions and/or suggestions.
assumebff()
mvbob()
mvfps(39.96, blur=10)
Assumefps(59.94)

Also, after I am finished changing the speed this way, i had planned to reinterlace using

SeparateFields.SelectEvery(4,1,2)
Weave()


any help or suggestions etc. would be greatly appreciated

[Mustachio]

Sorry a correction
using SeparateFields.SelectEvery(4,0,3)

Been running a few tests, and it seems to work, However, when i rebob the picture after interlacing it, i end up with a frame count mismatch, the original clip had 299 frames, then after interlacing and bobbing again, i end up with 300