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854x480 problem when moving to 720x480

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Alberto Bedin
854x480 problem when moving to 720x480
on Aug 20, 2010 at 2:47:24 pm

I'm creating some frames in 854x480 (1.0 PAR) in order to export them to DV Widescreen.

So I start a project in AE with 854x480 1.0 PAR and then I import them. Or also I can start a project in Premiere 720x480 1.2121 PAR.

The problem is that rendering the project in AE to DV Widescreen 720x480 1.2121 or watching it in Premiere 720x480 1.2121, I can see two black lines at the LEFT and the RIGHT of the video (they are small, some pixel).

I really can't understand why!

I can also try this:

- In PS create a 854x480 PAR 1.0 image
- Than in PS create a 720x480 PAR 1.2121 image
- The two size does not agree.

What should I do in order to properly export DV Widescreen video?

Thank you


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Dave LaRonde
Re: 854x480 problem when moving to 720x480
on Aug 20, 2010 at 4:14:39 pm

How was this video captured?

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Alberto Bedin
Re: 854x480 problem when moving to 720x480
on Aug 20, 2010 at 7:11:01 pm

Frames have been created in 3d studio max and saved ad .tga. I'm sure they are 854x480 PAR 1.00


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Paul Conigliaro
Re: 854x480 problem when moving to 720x480
on Aug 20, 2010 at 7:35:32 pm

What version of AE & Premiere are you using? The PARs changed in CS4. But since there's no NTSC DV Widescreen Square Pixel preset, it makes it a little difficult.

After so fiddling, it looks like you'll actually want 872x480 for a DV widescreen square pixel comp.

-conigs
[Disclaimer: Sometimes I am an idiot and misinterpret people's posts. I'm sorry.]


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Alberto Bedin
Re: 854x480 problem when moving to 720x480
on Aug 21, 2010 at 11:43:20 am

I'm using AE & Premiere CS5.

1) You are right! 872x480 PAR 1.00 looks like 720x480 PAR 1.2121. Now I really don't understand when I should use 854x480. Could you help me?

2) Ok, I'll use .tiff in future. And... what about using .rpf? Please note that I need alpha channel... Is it supported?


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