IVTC stresses.. solved? DVD recorder owners please read.

[fmctm1sw]

A long time ago I stated that I could see telecine effects in my converted video (movies and such). I was immediately written off as a lunatic, which in some cases is true. I believe I figured out what was happening from information already known. Capture cards capture material field by field without repect for the telecine pattern. I take that assumption right out of the avisynth documentation (telecide filter I think). Makes sense, how does a card know if something is telecined (maybe professional cards do)? What I was seeing was the resultant two frames out of five that end up combed. If encoded straight up without any intervention, up/down and left/right pans looked choppy/flashy/or strobed. Once I nailed down proper telecide() filter values, decimated, and added a pulldown flag, this problem went away. I'm wondering if DVD recorder users see this effect in telecined material. I would assume that it captures field by field as well. Any thoughts?

[SLK001]

You probably used the wrong first field in your original work (read the docs included in DECOMB to determine which field your capture card grabs first). Since your problem went away after you properly IVTCed it, this is almost certainly the case.

The capture card is just that - a capture card, recording what is sent to it. Since video is transmitted one field at a time, this is how it is captured by analog cards. No card knows that the video is telecined, because no flags are transmitted (boy, would that make life easier!). Only through post processing (either real time, or after the fact) can a video be IVTCed, and that is done with filters like DG's TELECIDE.

I don't know if a DVD Recorder encodes per field, or builds a frame before encoding. Either way, the resulting video is still 29.97fps, which means that no IVTC was performed (which it can't do, anyway).

And, you're still a lunatic! (Just kidding...??)