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Old January 7th, 2006, 09:33 AM   #1
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60i to 24p with nattress

I've noticed interlacing after completing a 1080i60 to 1080p24 deinterlace with nattress G Film v2.5.1 Demo. Is it normal for some frames to still be interlaced? This does not happen on a 1080i60 to 1080p30 conversions. So I'm here thinking something is going wrong on the 1080i60 to 1080p24 conversion. My settings are:

Film Frames Per Second: 24p
Media Field Order: Upper
Output field Order: Upper
Blending Type: 2 Field
Pulldown Pattern: (W W S S W) AA
Anti-Alias Amount: 0
De-interlace Option: Smart
Tolerance: 10
Output Cropping: Full Image
Cropping Shift: 0
User Aspect: 1.33

Using FCP 5.0.4 on a Quad G5. Any help would be appreciated.

Last edited by Andrae Palmer; January 7th, 2006 at 10:19 AM.
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Old January 7th, 2006, 05:31 PM   #2
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What camera are you using? I'm interested in getting a z1 and I want to know if I can convert it to high quality 24p.
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Old January 7th, 2006, 09:11 PM   #3
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Hi Andrae,

I just got Nattress as well and noticed some things that may be similar to what you are seeing. When I render out a Nattress 60i -> 24p clip and watch it on play back on my computer monitor it looks very interlaced -- overly interlaced even. BUT, when watching it out through firewire on my Sony monitor, it looks fine. It also looks fine when on a paused frame. Have you tried looking at the rendered video on a monitor?


mg
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Old January 7th, 2006, 09:47 PM   #4
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The interlacing occurs because of the 3:2 pulldown.

3:2 pulldown is needed because your television/broadcast monitor will usually ONLY display 60i.

Half of the frames will be displayed over 2 fields, while the other half of the frames will be displayed over three fields.

You can find a better explanation on Google:
http://www.dvdfile.com/news/special_...2_pulldown.htm

**Some monitors can display 24psf. If I remember right, it's a single frame flashed twice, with 24 pairs of frames displayed a second.

**As shorthand, by 30fps I really mean 29.97fps.
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Old January 8th, 2006, 08:07 PM   #5
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Quote:
Originally Posted by Matthew Groff
Hi Andrae,

I just got Nattress as well and noticed some things that may be similar to what you are seeing. When I render out a Nattress 60i -> 24p clip and watch it on play back on my computer monitor it looks very interlaced -- overly interlaced even. BUT, when watching it out through firewire on my Sony monitor, it looks fine. It also looks fine when on a paused frame. Have you tried looking at the rendered video on a monitor?


mg
I have a dual display HD setup and have been using the second display as my monitor. I had an explanation from Mr. Nattress himself saying what I needed to do is to use the Standards Conversion. When using that product and dropping the video into a 24P timeline I noticed none of the interlacing that I was having before.

Quote:
Originally Posted by Evan C. King
What camera are you using? I'm interested in getting a z1 and I want to know if I can convert it to high quality 24p.
I'm using the Canon FX1... now I'm getting great results while using the Standards Conversion.

Quicktime tutorial can be found here:
http://www.nattress.com/Movies/60i%2...on%20small.mov

Quote:
Originally Posted by Glenn Chan
The interlacing occurs because of the 3:2 pulldown.

3:2 pulldown is needed because your television/broadcast monitor will usually ONLY display 60i.

Half of the frames will be displayed over 2 fields, while the other half of the frames will be displayed over three fields.

Link to Standards Conversion:
http://www.nattress.com/standardsConversion.htm

You can find a better explanation on Google:
http://www.dvdfile.com/news/special_...2_pulldown.htm

**Some monitors can display 24psf. If I remember right, it's a single frame flashed twice, with 24 pairs of frames displayed a second.

**As shorthand, by 30fps I really mean 29.97fps.
Now I understand why it wasn't working with G Film v2.5.1. Mr. Nattress explained it to me via email:

-----------------

Hi Andrae,

YEs, that's normal as Film Effects isn't really a converter... Let me
explain.

To keep the results of film effects compatible with standard video,
after it does the conversion from 60i to 24p, it adds back in 3:2
pulldown, which is an interlaced process, hence you get 24 frames per
second look, but embedded in 60i, just as if you'd shot with a DVX100.

If you want 24p to edit in a 24p timeline, you don't want that 3:2
pulldown, so I make a special tool for that - Standards Converter,
and it's NTSC to Film option.

Graeme

---------------------

I hope this helps everyone.
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