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Old 6th June 2011, 13:09   #1  |  Link
Blue Star
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Slideshow PAL DVD

Hi, I making a slideshow in premiere pro to burn to a PAL DVD and need some help. Like how to prepare my images before importing to premiere?

I know NTSC is the best choice because the original pictures is 5237x3491 but I want PAL. I don't want to cut anything on my pictures if I don't have to. I also want the correct aspect ratio.

If I scale my pictures in photoshop to 592x576 (16:9) or 792x576 (4:3) I think I have to put black bars up to 720px. But isn't there an easier way?

PAL 16:9 anamorphic widescreen
5237x3491, 864x576, 864/1,4587 = 592,3082196476315 = 592 = 592x576

PAL 4:3 anamorphic widescreen
5237x3491, 864x576, 864/1,0940 = 789,7623400365631 = 792 = 792x576
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Old 6th June 2011, 18:03   #2  |  Link
manono
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Quote:
Originally Posted by Blue Star View Post
But isn't there an easier way?
Not without cropping into the pictures. Your source photographs are approximately 1.5:1. Scaled down and encoded for 4:3 they'll have black bars above and below (not that much, though). Scaled down and encoded for 16:9, they have (larger) black bars on the two sides. There's no way around it.

Quote:
I know NTSC is the best choice because the original pictures is 5237x3491 but I want PAL.
I don't quite see how NTSC is the better choice. The PAL version will have slightly higher resolution.

Quote:
If I scale my pictures in photoshop to 592x576 (16:9) or 792x576 (4:3)...
Don't scale the 4:3 one that way as it'll just have to be scaled again. The max width is 720.

As for which DAR (4:3 or 16:9) is the better choice, it's pretty much a wash. Theoretically you should get very slightly better image quality by encoding for 4:3.

Last edited by manono; 6th June 2011 at 18:07.
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Old 6th June 2011, 19:42   #3  |  Link
Blue Star
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Thank you!

I found a way to do this in Premiere Pro. In the settings "Default scale to framsize". Seems like I get 25px black bars above and below. But now when I compare the pictures in the computer it seems like Premiere Pro made wrong aspect ratio. The pictures also got bad contrast. But It seems like everything looks better on the DVD.

Do you think it's better to do this by my own?

In that way I need help with how to crop the pictures in Photoshop. Which resolution to get 1,0940 and 1,4587?

Last edited by Blue Star; 6th June 2011 at 20:02.
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Old 6th June 2011, 20:52   #4  |  Link
manono
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Originally Posted by Blue Star View Post
Seems like I get 25px black bars above and below. But now when I compare the pictures in the computer it seems like Premiere Pro made wrong aspect ratio.
Well, the 720x576 picture, if that's what you're looking at, is supposed to have 'bad' aspect ratio. Only after it gets resized at playback time does it look 'normal'.

And I don't think you want 25 rows of pixels above and below. 24 each would be better. Or 26/24. Don't use odd numbers.
Quote:
Do you think it's better to do this by my own?
If you know what you're doing which, by the looks of things, no offense intended, you don't.

Have you seen the free DVD Slideshow GUI program? It's very good:

http://www.videohelp.com/tools/DVD_slideshow_GUI
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Old 10th June 2011, 01:36   #5  |  Link
Blue Star
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It looked like the video from premiere got a 25px bar but it was 26px. I know that I not should use odd numbers.

Thanks for the software!

I know that I'm a noob but that's why I'm here asking questions Can you please look at this and tell me what's wrong?

5237x3491 --> 720x480

480 (Vertical) x 1,33 (4:3) = 638,4 / 1,5 (PAR) = 425,6 px tall --> 720x424

720x424 with black borders above and below to 720x576 should look good on a PAL 4:3 DVD.

Last edited by Blue Star; 10th June 2011 at 01:38.
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Old 10th June 2011, 01:52   #6  |  Link
manono
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Quote:
Originally Posted by Blue Star View Post
5237x3491 --> 720x480

480 (Vertical) x 1,33 (4:3) = 638,4 / 1,5 (PAR) = 425,6 px tall --> 720x424

720x424 with black borders above and below to 720x576 should look good on a PAL 4:3 DVD.
Why, on the one hand, do you write of a 720x480 (NTSC) DVD and then say you're making a 720x576 (PAL) DVD? If the intended result is to be PAL, then 720x424 with black added above and below to bring it up to 720x576 is entirely wrong.

I get something like:

LanczosResize(720,512)
AddBorders(0,32,0,32)
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Old 10th June 2011, 09:02   #7  |  Link
Blue Star
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Thanks for the reply!

Yes, you're right. I need to use 576 vertical lines like this. Then I get the same result as you

5237x3491 -> 864x576

576 (Vertical) x 1.33 (4:3) = 766 / 1,5 (PAR) = 510 px tall (510/16=31,875, 32x16=512) -> 864x512 -> 720x512 (Resized to 720, MPEG has an embedded DAR)

Last edited by Blue Star; 10th June 2011 at 09:06.
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