How to handle switches b/t NTSC and FILM in DVD2AVI?

[Hoagie]

I am currently working on ripping animation and encoding a DVD complient MPEG2 file. I've gotten a lot of help but am still trying to figure out one last thing (at least "one last" at the moment).

I have a file that, when loaded and previewed in DVD2AVI, switches between NTSC (Interlaced) and FILM (Progressive). So my first question is -- how do I treat this?

Should I use 'Forced Film' or 'None'? If 'None' -- should I use the SVCD Guide at Doom9 to work with the IVTC?

Now I run into a problem with my frame rate. I *MUST* have a 29.97 fps MPEG2 file, so what options should I choose in the IVTC... 24fps or 30fps? Of course, I will have 29.97 set on the Video tab.

Should I select the 3:2 pulldown option at all? This is something else that was suggested to me, that I am still still working on understanding when exactly I need to use it.

Many thanks for any help!!

Hoag

[shochan]

ok do a forced film and when you encode with tmpge do a 3:2 pulldown hwen playback and it will be treated as a ntsc source.

[Hoagie]

This does a *great* job with the "FILM" portions of the video, unfortunatly it causes the "NTSC" parts to behave badly. It appears (to me) that there is still some interlacing that is taking place in the resulting movie.
If I try a IVTC on the video, the automatic cuts half of all the images out... but it is only one part of the (current) video that is giving me trouble.

Am I going to forced to go into IVTC and manually select all the frames (being that vast majority of them) and just removing those that I do not want?

I can get the "FILM" portions to look great, but those blocks that are coming up as "NTSC" are getting going to hell. There has to be a good clean way for me to handle these portions... god I hope there is an easy way to handle them!

Hoag

[Vejita-sama]

Can I assume you are working with an Anime DVD Truth is what I normally do is set force film -> encode -> pulldown. You're right this will leave some interlacing, but IMHO de-interlacing affects the quaility in 'really odd ways' with animation.

If that fails, I keep it at 29.97, run IVTC (maybe deinterlace with a high setting) and then pulldown.

The problem is that even thou most anime will be shown on TV (29.97 interlace) it's hand drawn so progressive by nature. To save time/money drawnings are often made to 23.976 too. Add in CGI at 30fps or 60fields/s, opening/endings at 30fps, with the show at 23.976, etc. etc. and you get a big mess. There's some good info on all this at http://www.inwards.com/dbb but his method has WAY to many steps and IMHO doesn't produce a better encode (but does have less try and error to find the best settings).

[Hoagie]

Thanks Vejita-sama,

Yes, it's an Anime DVD -- Macross 7 to be exact.

I actually stepped through the section with problems and found that the pictures "jumps" every 5 frames. When I looked at the raw video there is an interlacing (in the NTSC section) that occurs every 4th frame -- which is my guess as to why the jump is happening. So it seems that I would need to remove them manually, they are at least coming in a pattern.

Can I use IVTC to manually remove this single interlaced frame? If so, how do I prevent TMPGEnc form not dropping the frames. This is -- if I drop every 4th frame for a 2 minute clip, how do I prevent the video from falling 4+ seconds behind?

The link you posted isn't found.

I tried putting in a 29.97fps project of my clip and running IVTC, but the automatic fails... horribly! Does that mean (if I am forced to use this method) that I am going to have to go through manually and find the pattern for each scene?

Thanks for the help man -- feel free to pass along any more tidbits of info!

Hoag


<font size=-1>[ This Message was edited by: Hoagie on 2001-09-02 08:26:07 ]</font>

[homerpez]

UNCOMPENSATED TESTIMONIAL:

For any anime DVD I have ever done, it's had this screwed-up mode, and if I run "Forced FILM", and encode either as 23.976 VCD, or 29.97 SVCD (pulldown) it looks identical to the original, no problems.

[Hoagie]

Damn. I've tried a Forced Film project with a 3:2 pulldown to 29.97 MPEG2 and I get "hickups" during the NTSC portions.

Do you verify the field order before encoding? I have mine set "correctly" according to the guide at Doom 9, but I can't remember if I've tried doing the above with the "incorrect" setting. Maybe that will actually make it work (I've seen stranger things).

I give it a short on Monday morning. I'm about half way through a IVTC encoding that I think might actually work... if it doesn't, I'll try the forced film again.

Thanks!

Hoag