IVTC or not for post production

[oldfart13]

I have been having good success with using the Inverse Telecine filter in DVD2SVCD for people with progressive scan TVs that want my caps but I was thinking if anyone has done this with their caps in DVD format? Since I don't have a progressive scan TV, I can't see a real need but if I do get one, wouldn't this clean up a lot of problems with movies/TV shows shot on film?

[vhelp]

Hi oldfart,

I'm not fluent in the things of progressive scan tv's, but what the
"Inverse 3:2" does (at least in TMPG) is take a TRUE film source, (ie,
a movie you might have captured from HBO, for instance) ..

It takes the Telecine** source (ie, PPP II PPP II PPP II) and in short,
turn the 29.970 fps (of PPP II (or prog prog prog Inter Inter) into
PPPPP (or progresive frames w/ no interlace) ..

But, that only works flawlessly IF and ONLY when your source is TRUE
film. No glitches and no extra Interlace frame inserted at odd places.
(these can be found in most of todays improperly (or tainted) Telecine
for TV broadcasing) such as TV shows like 7th Heaven for instance, or
even Star Trek Voyager, as another example.

** Note:
You have to make sure you source starts on the first Progressive frame
for this to work flawlessly. (At least in my experience)

Another Note:
for "Inverse 3:2" to work, your source has to be 29.970 fps, and when
you set up your encoding, your fps to be set to 29.970 (NOT 23.976) or
else you're asking for trouble. (I know, I asked for trouble - and got it)

Don't try and use "Inverse 3:2" on PURE Interlaced frames (ie, sush as
News; Sports, for instance)

Good luck,
-vhelp

[oldfart13]

The source I am using (60s TV series) were all shot on 35mm film so IVTC works great (at least in SVCD). I haven't tried new stuff or SPFX laden shows entirely for the reason that these do not render well with IVTC or may not be fully film compliant. I was wondering if anyone with progressive scan equipment has been using IVTC when encoding content to DVD spec? I'm assuming they are also using material which was 100% film compliant. I have not done so with content from my DVD recorder but I might try a few projects just to see how they come out...

[adam]

You don't need a progressive scan television to see the quality difference between FILM encoded and NTSC encoded material. If the source originated as film, performing an IVTC is always a good idea regardless of how or where its going to be played back.

[oldfart13]

I have 13 inch and 27 inch direct view (non progressive scan) TV sets. Maybe I'm getting old, but I can't tell a difference and I've burned my caps to SVCD from DVD spec Mpegs that were interlaced. Supposedly, doing the IVTC will clear up jitter playback problems as well, I changed the field order from top (output of the DVD recorder) to bottom and cleared up a number of playback problems with some other peoples' equipment. Again, maybe the IVTC is best with progressive scan equipment. It's a wonder though that there is no filter for such on the DVD recorders when dubbing from HDD to disc. Maybe with the new Sony units since they allow 2 pass VBR recordings from the HDD to disc...