Deinterlace video slow motion?
 

I haven't tried it yet, but some of my videos have slow motion that was made by doubling or tripling the frames/fields or however they did it. Definitely not with a higher frame rate and played back at normal speed.

Does anyone have any experience on what happens when a bob filter tries to handle that?

I'm saving out the capture right now. I guess I'll find out tomorrow when I try to encode it. :unsure:

If the slow motion was made by repeating the same combination of lower and upper fields for several frames, then the image will appear to rapidly flicker back and forth between the fields for as long as the motion is stopped.

This is what happens when I take a still image to tape using a DV camcorder. This does a frame grab and holds it for five seconds. When I play the interlaced footage directly in Windows Media Player it shows the interlacing lines ("mice teeth") on any parts of the image that contained motion when the frame grab was made, but after running it through QTGMC de-interlacing (a very sophisticated form of bob de-interlacing) then it shows the rapid flickering I described.

Essentially this is as close as you can get to show it would look when directly viewed on a CRT TV.

got a sample? I suspect that QTGMC can handle such a source without a problem when not using default settings,..