Rendering using 24p (2-3-3-2 pulldown) remains interlaced

Gothic wrote on 11/13/2003, 2:17 AM

Hi there...

I've done so much research/testing on this it's wearing me out...

But I've got some definite questions now.

Okay, I am importing clips from the DVX100, some 24pA and some 60i.

I am working with them in a project that I have opened as "NTSC 24p (2-3-3-2 pulldown)

When i render this using the default 2-3-3-2 template, i get the jaggedy interlaced edges.

So I tried with 2-3 pulldown, same thing.

Then i did it in 29fps progressive, and it doesn't look as nice, but it was definitely progressive.

I also then tried 23.97 fps progressive using the panasonic DV codec, and it also was progressive.

So my question is, is the 2-3-3-2 method supposed to be progressive? if so, how do I make sure it is working properly? The progressive menu item is greyed out so i can't choose it and am at a loss now as to what I should be doing.

Thanks for any help.

Comments

farss wrote on 11/13/2003, 6:16 AM

Progressive and interlaced are not really opposites. Video can be both.

You can only display video under most circumstances as interlaced.
The DVX100 takes a whole frame at once, 24 times per second. So that it can be recorded to tape in a way that anything else can read thiose frames are split into fields and addition fields created. Each field has half the number of scan lines. AS they were taken at the same point in time they are still 'progrssive', butthey are being interlaced so the system can cope with them. With me so far?

Now to create 29.97 fps additional fields have to be created. Some of these come from alternate frames. If the contained motion then in the reulting frames you will see interlace artifacts. Same thing happens when film is converted to video.

If you want to get rid of this the only way is to remove the pull down. This works best on 24pA footage. Now you have only entire frames, no fields, no interlace, no artifacts. And no way to PTT!

You can convet to mpeg to create a 24p DVD, you can send your file off on a HDD to have it printed to film. To do anything with it as video, i.e. PTT or transmission it has to be pulled down and converted to fields with interlaicng and hence some artifacts.

Hope that clears up your confusiion, or did I make it worse?

Cheesehole wrote on 11/13/2003, 10:00 AM

Great explanation.

How does the footage look on a TV? That's really what DV is for.

If you want to view it on your PC, try DivX or Windows Media 9. Both can handle 24p encoding with no interlacing.

ZippyGaloo wrote on 11/13/2003, 12:14 PM

DELETED!

Gothic wrote on 11/13/2003, 3:20 PM

Thanks for the answers...

Although it's still somewhat confusing.

Here's a question:

Why are there no jaggedy edges when I render as 24 fps, progressive using the Panasonic DV codec, but when i render using the 24p (2-3-3-2) NTSC DV built in method the jaggedy edges appear?

farss wrote on 11/13/2003, 3:23 PM

Zippy,
if you are blessed with some high end DVD player and TV or screen then if you author a 24p DVD you can play it as just that, no interlace. Just 24 fps displayed as that on the monitor pretty much the same as film projection.

Unfortunatley as far as I know only available at absurd price point.
For those of us in PAL land even harder to play 25p DVDs but it's coming.