Good info Moth3r!

Antcufaalb, judging by your question, you haven't fully understood what interlacing is. Interlacing basically refers to how televisions draw an image on older crt television and the artifacts that will show up when you play back TV based material (like VHS tapes) on computer monitors or HD TVs - which are PROGRESSIVE scan monitors.

Remember those two words, INTERLACED and PROGRESSIVE. Basically two different methods for displaying an image on a screen. Interlaced is how older CRT tvs draw - and old camcorders/TV cameras record - an image. Progressive is how a film or a modern digital camera records an image and how a movie theatre or computer monitor or HDTV draws an image. These two methods are VERY different from each other.

So to quickly answer your question, when you IVTC you are reversing the telecine process. You are going from an interlaced image to a progressive image. A telecine is 24P -> 60i and an IVTC is 60i -> 24p. (I say 60i because a TV is not really 29.97 FRAMES per second. An old TV doesn't draw frames, it draws FIELDS in a "venetian blinds" zig zag manner 59.9 times a second, which is what causes that "zig zag" combing on a progressive display monitor)

Do not worry about deinterlacing your project AT ALL. In fact, when you are capturing, be sure your capture isn't deinterlacing it on the fly or you are going to lose fields and thus you will be losing frames.

Deinterlacing is an operation to remove combing and is ONLY useful for stuff that was SHOT on video (like home videos or Saved By The Bell) and then DISPLAYED on a progressive scan monitor like a computer or an HD TV. Of course, the problem is, like the article explains, how can you do this without losing resolution? This is actually a huge headache since we have over 60 years of video lying around (home videos, TV shows shot on video, concerts), and how do we preserve all of this in its fullest quality for the future where crt TVs - who naturally draw their image in an interlaced manner - won't exist anymore?