NTSC encoding result in progressive/interlaced frames

[pausefisk]

I've ripped alot of PAL dvds, but never NTSC. I wanted to give it a try, but im getting confused with my result.

Video source is NTSC 29.970, FILM, Progressive, Field Order: Top

I use Doitfast4u, ReAuthorist, DoCCE4u and scenarist. In doitfast, i check for autodetect NTSC video type, (subs) and nothing else. I use same settings as for PAL.

When encoding (CCE 2.66), im using the settings suggested. 2:3 Pulldown, TFF and Progressive check. (i did also try encoding NOT checking TFF)

But, my result, encoded .mpv.m2v (after pulldown) is that every secound frame is progressive/interlaced. Except for that, every thing else is like the original (29.970, TFF, FILM) Why is it like this? This is not supposted to be correct is it? When i check the .mpv file before pulldown is run, all frames are progressive, Video type is NTSC, frames 23.976 and TFF. (using DGIndex to check)

So, after pulldown are run (automaticly by Docce4u, i guess) all frames are changing between progressive and interlaced every frame.

What is wrong? :confused:

[jel]

hi pausefisk,

although i am not an NTSC expert (far from it in fact), i do not believe that anything is wrong.

my understanding of the pulldown process is that it takes the actual 24 fps mpeg stream and 'converts' it to the required 29.97 displayed frames (some of which are a hybrid of 2 progressive frames) which is the interlacing effect you have noticed.

maybe these guides will help explain more clearly than my hopeless attempt at something i only have the smallest grasp of :)

Force Film, IVTC, and Deinterlacing (http://http://www.doom9.org/ivtc-tut.htm)

Video and Audio Syncing Problem: Why and How. (http://www.doom9.org/index.html?/synch.htm)

hth
j

[pausefisk]

thanks for the reply jel, but i have already read those articles, but that did not help me on this one. source video is progressive, i encode as progressive, so it's the part that gets interlaced i really can't understand. and there is no way that i should de-interlace a progressive video? There must be one setting in doitfast/docce i didt wrong, but what...

[Trahald]

the alternating progressive/interlaced is how the original pulldown.exe was written(which is the code bbwoof used in batchcce). if you dont want that to happen, set the 'all frames progressive' flag to ON in the setup options. this alternating effect will play fine on a ntsc dvd player, btw, since the actual video is stored progressive for everyframe, its just the flags that alternate.

[pausefisk]

Thanks man. DoCCE4U dont have this option. I tried run pulldown in the menu from BatchCCEWS (aftern checking mark all frames as progressive) on my mpv file, it didnt help me, but i used the same option in Doitfast4u, and that fixed it. Cheers :thanks: