How to smooth scrolling text?

DonAF wrote on 6/24/2009, 10:47 AM
How does one make scrolling text move smoothly up a TV screen?

I am using the ProType Titler in Vegas 9 to scroll names of a wedding party using a couple of differing fonts. I need this to look elegant. But the characters jiggle as the text scrolls up. I guess this relates to TV scan lines but how do I fix it?

Surely there is a "correct" way to accomplish smooth scrolling. How do the experts do it?

This project is rendered to mpeg (using Widescreen NTSC DVDA template at the Good setting) and burned to a DVD using DVDA.

Other posts have suggested making a jpeg or png in PhotoShop and using pan/crop for the scroll. I'll fall back to that if I must, but there's got to be a way for ProType Titler to do the job. I'm finished with my project except for this scroll issue.

Solutions?

Thanks, Don

Comments

TheHappyFriar wrote on 6/24/2009, 11:11 AM
doesn't protype have a scrolling text preset? The text plugin does, you could try that one. It's simpler but renders faster.
xberk wrote on 6/24/2009, 11:30 AM
the characters jiggle as the text scrolls up.

If you play the mpg file on your computer does it giggle in Windows media player -- or just when playing back the DVD on a TV?

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Former user wrote on 6/24/2009, 11:53 AM
Just a couple of thoughts that might help.

If you are in NTSC land (U.S.), it is probably the scan lines causing the problem.

1) Do not use a THIN type. Make a bold type and that helps some.
2) If possible, put a slight blur on the type. Not much.
3) Play with the scroll SPEED. Some speeds are smoother than others.
4) Sometimes lowering the WHITE level on the type will help. Try to keep it in TV Safe range (235).

IF all else fails, use TYPE pages instead of a scroll.
DonAF wrote on 6/24/2009, 12:06 PM
Yeah, it giggles in Windows media player, too. Does that imply it's a rendering issue?
Don
Tech Diver wrote on 6/24/2009, 12:08 PM
Additional tips:

Add a very slight amount of Gausian blur in the vertical direction only.

Do not use a font/size combination that will yield parts of text strokes that are only one pixel high. A minimum of two pixels along the vertical are needed. A typical problem font is a cursive style that thins out too much.

The industry standard for roll speed is 300 pixels per second. However some variation might yield better results.