How to handle a source which has telecided material mixed with true interlaced?

[SuprSonik]

Ugh, this is so frustrating. I'm trying to encode an anime, and while the actual show is telecided and IVTCs perfectly, the opening, ending and "preview" are true interlaced material. IVTCing makes them look all jerky and doesn't solve the interlacing problem...

I'm still fairly new to Avisynth, so I don't know how to handle this. I could just IVTC it and deal with the nasty opening/ending, but...it's so annoying. De-interlacing the whole thing doesn't sound real appealing either. I'm just using telecide/decimate at their default settings...could someone clue me in as to what I could do?

Is the best idea to double the 4th frame or blur the 4th and 1st frames somehow and then de-interlace the interlaced material, thus keeping it at 29.97 FPS? Or is there some way to make the framerate variable, for the IVTC'd parts to run at 23.976 and the de-interlaced to run at 29.97?

Thank you, and sorry if I made that last paragraph more confusing that it should have been...

[Mug Funky]

i think the TIVTC plugin has a mode for decimating 30p down to 24p. it can probably handle 60i as well, though i'm not sure. it just blends like you suggested doing.

it's a pain that US titles, previews and credits aren't edited in 24p like (at last) the shows are. you may notice if you have japanese titles on the same disc that they are 24p all the way through. if you have any funimation DVDs you'll be able to compare the japanese and english stuff with the angle button. sadly the yanks just slap their titles over the textless materials that are given them, with no regard for telecine.

[mg262]

I don't know much about this stuff, but... if the different bits are this easy to identify, couldn't you process them separately (to different frame rates) and then dump them into a variable frame rate container (.MKV)? Or is that not an option?

[manono]

You haven't said what your output format is, have you? If DVD, then you can encode the openings, endings, (and reuse them) and previews at 29.97fps, and the episodes themselves at 23.976 with pulldown and join them all together at the authoring stage.

If for AVI, both Decomb and TIVTC have hybrid modes which blend the 30fps material as you described, and IVTCs the 24fps main episodes normally. Smart Decimate uses bobbed fields to avoid blending the 30fps to 24fps and makes it play reasonably smoothly, and also IVTCs the 24fps stuff normally.

If you're using Decomb, then read up on Decimate's Mode=3 in the Reference Manual.

[SuprSonik]

I'm sorry, that slipped my mind. I'm using the .mkv container.