can't seem to get a stutter free credit roll

Mindmatter wrote on 11/25/2014, 6:39 AM

Hi al,

I had posted about this issue a while back, and in spite of the numerous suggestions and links to possible solutions, I cannot seem to get a simple smooth credit roll. The articles that some helpful folks linked me to mainly treated the mathematical / technical cause of the issue, but not really a solution, unless I missed something. I remember reading that people seem to get pretty smooth rolls in other NLEs, so Im wondering..is this a Vegas issue? How do you achieve a smooth text roll? On my last post it was about a .png pan with newspaper articles that stuttered, this time it's a credit roll - tried with Vegas titler as well as NB titler pro3 , and while NB3 seems a tad smoother, both are not really nice to look at. Has anyone here maybe solved this, or what's your workaround for this type of problem?
Thanks for any halp!

Comments

OldSmoke wrote on 11/25/2014, 6:58 AM

When do you get the stutter? In the final product? What is your final product? I only have issues with DVD because it is interlaced but it can be reduced to some extend.

farss wrote on 11/25/2014, 7:08 AM

[I]"The articles that some helpful folks linked me to mainly treated the mathematical / technical cause of the issue, but not really a solution, unless I missed something."[/I]

Yes, you did miss something.
The problem can be addressed to some extent by ensuring your credit roll only advances the text in even multiples of one scan line per frame. I've only used this trick years ago for horizontal scrolls which are even more of a pain as you generally want them moving pretty fast.

One simple trick is to add a little motion blur using Supersampling Or if that hurts the grey cells too much then try a little Gaussian Blur in the vertical direction only.

I generally prefer Adobe's credit roll generator because it has way more features than the anything in Vegas, it includes the ability to add images and supports most of the typographic stuff however there's no magic from it either when it comes to avoiding the stutters. It is a bit easier to adjust the scroll rate though, so I just tweaked that until I got a scroll rate that was readable and didn't stutter.

Bob.

Mindmatter wrote on 11/25/2014, 7:53 AM

Oldsmoke, it's in the 1080p mp4 render at 2000000 mb/s resolution.
Bob, I'm admittedly really really terribly at maths - a thing that has traumatized me throughout my entire education as my mainly visual and associative brain could just never make any sense of it whatsoever ...buit I'll give it a new shot. Thanks!

OldSmoke wrote on 11/25/2014, 8:19 AM

1080 30p or 60p?

dxdy wrote on 11/25/2014, 9:26 AM

JohnMeyer did a really good post on this a couple years ago.

Mindmatter wrote on 11/25/2014, 9:43 AM

I'm in PAL land, so 25p

riredale wrote on 11/25/2014, 11:06 AM

A "stutter" to me implies a kind of stop-start jumpiness. What I get with interlaced credit rolls is a kind of "waviness" effect in the top and bottom of each character. I certainly get stutter on my editing PC in the Preview window just because of its modest power, but on the final render there's no stutter per se.

I've conventionally used a bit of blur to mask the effect, but never thought of having blur in just the vertical direction. I'll have to try that.

The waviness effect seems to me to be most irritating when it is slow. One has the option of re-timing the roll to minimize the irritation.

John_Cline wrote on 11/25/2014, 11:10 AM

25p isn't much temporal resolution and stuttering is probably inevitable. Credit rolls in 24p films stutter like crazy, perhaps you could just fade in/fade out or cross-dissolve a screen of credits at a time.

farss wrote on 11/25/2014, 1:06 PM

[I]"I'm in PAL land, so 25p"[/I]

So am I. What's interesting is that from memory all those complaining about this issue seem to be in the same boat. As for film credit rolls suffering from the same problem, not that I've noticed in cinemas or when shown on OTA TV or from DVDs, certainly nothing as bad as Vegas can get it. I suspect the issue has as much to do with the higher vertical resolution of PAL as the difference in frame rate.

One thing I would suggest trying is doing the credit roll in 1920x1080 and adding a tiny amount of Gaussian Blur. What that does is to provide a poor mans form of anti-aliasing.

Bob.