Jerky scrolling credits in 24p

M

markran

Active member
Ok, the movie's done, everyone's clamoring for a DVD but the scrolling credits are flickering / stuttering. It's not *terrible* but it's definitely noticeable. I am using the standard Vegas scrolling credits (near-white on black) on a 24p timeline that is being output using the standard NTSC DV 24p (2-3 pulldown) setting. I slowed down the speed a bit but it's still there. I checked that motion blur is on for that track and it is.

Second question, I've been outputting my tests using the standard DV 24p setting described above, however for the final output (to be burned to DVD), I want to use uncompressed so as not to suffer further compression artifacts. What setting do I use? None of the uncompressed settings specifically says "2-3 pulldown" like the DV ones. There is one that says "23.976". Is this what I should use? Will it do the proper pull-down?

Thanks very much for your assistance.

--- Mark
 
Re: Jerky scrolling credits in 24p

I'm not sure what's going on with the credits, so I can't really help you there.

However, you're gonna find that you can't go uncompressed with a DVD. #1 There isn't enough room on the disc. #2 It wouldn't match the specs set forth for DVD. What you have to do is render out to MPEG2. Depending on how long your movie is, you'll have to adjust the bit rate to give you the best quality while still being able to fit it on a single DVD.
 
Re: Jerky scrolling credits in 24p

Sorry, I wasn't clear in the question. I'm rendering to an uncompressed file which I will then compress to MPEG2 for DVD.

--- Mark
 
Re: Jerky scrolling credits in 24p

Are your credits in a pretty extreme color? Something really bright? Or somethine really unnatural?

Your TV might not be able to handle the color. This is one of the reasons to preview on an NTSC monitor.
 
Re: Jerky scrolling credits in 24p

No stock computer will play back an uncompressed file with zero jerks. Too much data throughput. I understand why you did, but you also need to realize it's gonna jerk. The rest of your movie is jerking too.

Put the uncompressed file on your timeline, do a ram render to DV (CTRL+B) and see if it's still jerky. It likely isn't.
 
Re: Jerky scrolling credits in 24p

Spot, thanks for the response. The problem is not with playback. I have rendered the file down to DV and also put it on a DVD. It is equally funky everywhere.

David, thanks for the response. The text is white (220,220,220) on black. Shouldn't be a problem there.

So, has anyone here successfully done scrolling credits using the stock Vegas titler template in 24p that were butter smooth?

--- Mark
 
Re: Jerky scrolling credits in 24p

With credits you want to set your scroll rate so that it's an even multiple of the TV refresh rate.  If you're in NTSC, you have 480 pixels to work with, and 60 updates per second, so you want your credits to scroll at such a rate that one screen goes by in (480/60=8 ) 8 seconds, or some even multiple/divisor.  So, four seconds for one screen would be a good quick rate, 8 seconds would be a nice slow crawl.

Any other speeds will result in jitter and twitter.

That's how we used to do it in Premiere 4.2 at 60i... not sure what the proper rate would be for 24P, but it should be about the same because you're still converting to 60i...
 
Re: Jerky scrolling credits in 24p

Mark,
White on black is the toughest for DV to handle.
I've had better luck keeping the white titles to 200 or less and outlining them with a dark grey (even a 1 or 2 pixel outline will do) to ease the white/black transition flicker problem. I noticed a definite difference in readibility that way.
Hope this helps.
Ken
 
Re: Jerky scrolling credits in 24p

Thanks for all the help everyone. Just to wrap up on this, I did get it to work. It was a combination of slowing down the scroll further, backing off the white color to around 200. There was also a major problem with the framerate I was outputting to. I think it was causing major headaches when going to DVD. I believe I have it sorted out now. Thanks again.

--- Mark
 
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