Got the Jitters: Why Does This Happen? at DVinfo.net

Barry Rivadue · April 18th, 2006, 06:01 PM

I put together a "slideshow" of still frames from my video which looked rock solid on my Vegas program, but when I burned it to DVD many of the still images have an unholy jitter. Why doe sthis happen? It looked perfect in the computer but once on the DVD it plays differently. Is there a pre-emptive way of preventing this before it goes to DVD? Or is it the player?

Thanks for any insight.

Edward Troxel · April 18th, 2006, 07:15 PM

Your TV is interlaced. There have been many posts on this topic. You might try turning on "Reduce Interlace Flicker" and adding a very slight blur to your images. Fine lines will definitely cause this.

Barry Rivadue · April 18th, 2006, 07:53 PM

Thanks; I'm surprised though that some of the images are rock solid. It seems almost random.

Peter Jefferson · April 19th, 2006, 12:00 AM

also be aware of the resolutions youre using in these pictures, as when Vegas downscales it can have some issues with super high res/dpi images

Bill Porter · April 19th, 2006, 01:39 PM

Peter (or anyone),

Any tips on what sizes/rezzes do work well?

Mike Kujbida · April 20th, 2006, 07:36 AM

Quote:

Originally Posted by Bill Porter

Any tips on what sizes/rezzes do work well?

It really depends on how much zooming and/or panning you want to do.
NTSC is 720 x 480 so double that for a 200% zoom, etc.
If you're scanning images, my (very general) rule of thumb is that, at a scanner setting of 100 dpi, 1" = 100 pixels.
Therefore a 6" x 4" image at 150 dpi = 900 x 600 pixels.This gives you some room to do a moderate zoom and/or crop.
If it was a large group shot though and you wanted to zoom into one person, then you'd have to increase the scanner resolution.
Also, small images need higher settings to come out OK. For example, an photo 1" x 1" would be scanned at around 600 dpi for clarity.

Problems have arisen when folks try to drop several very high res images (4 megs each or larger) from their digital camera on a Vegas timeline. Unless you've got a fast machine with lots of RAM, etc. Vegas eventually slows to a crawl. The usual answer is to batch convert them to smaller sizes. Ifanview, a free app, is a great tool for doing this.

Bill Porter · April 20th, 2006, 03:22 PM

Thanks, man.

Also I think you mean irfanview.

Mike Kujbida · April 20th, 2006, 07:28 PM

You're welcome Bill.
And I did mean Irfanview.
I knew I'd made a typo somewhere but couldn't see it staring at me :-(

Bill Porter · April 20th, 2006, 07:40 PM

aint no thang! :)

Jim Ohair · April 21st, 2006, 12:27 AM

I don't remember who I got this from but it cured my problems with this completely.

flicker....stuttering pictures
In VMS 6, right-click on the event (each still photo), and select "switches", then check the box "reduce interlace flicker".

One of the things I did to help alleviate the problem is to turn off 'Fast Video Resizing'. This is a check box that appears
on the Render Settings screen when you go to Make Movie (at least in Movie Studio 4). It slows down the rendering, but also
cleaned up some of the problems like you are describing.

Also render at best quality instead of good.

Barry Rivadue · April 21st, 2006, 05:42 PM

Quote:

Originally Posted by Jim Ohair

I don't remember who I got this from but it cured my problems with this completely.

flicker....stuttering pictures
In VMS 6, right-click on the event (each still photo), and select "switches", then check the box "reduce interlace flicker".

One of the things I did to help alleviate the problem is to turn off 'Fast Video Resizing'. This is a check box that appears
on the Render Settings screen when you go to Make Movie (at least in Movie Studio 4). It slows down the rendering, but also
cleaned up some of the problems like you are describing.

Also render at best quality instead of good.

Thanks for all the answers.... :D

Brian Shircliffe · April 27th, 2006, 02:10 AM

Depending on how fast you are croping and panning your photos play around with the motion blur envelope in the video bus... add some keyframes to start increasing the motion blur the faster the motion gets. I at least use a .02 for the slow stuff and around a 5-6 for the faster stuff. Things might look a bit too blurry sometimes, so you may want to scale down the blur. I really wish the program would figure out realistic motion blur envelopes on its own for more realistic still picutre animation.

For example I often go from a slow fadeing picutre into a faster one disolving back and forth.. makes is harder to get the high quality look of no motion blur... anyway.. maybe someone will write a script for this one day?

I often fool around with the preview in player mode for hours to get the right amount per sequence.

My other issue with this is that you just can't see what it will honestly look like on a TV from the computer unless you render it onto a DVD or VCD or video tape... I have my computer hooked up to a TV but the if the player skips even one field it totally screws up the whole "feel" of the motion.

April 18th, 2006, 06:01 PM	#1
Barry Rivadue Major Player Join Date: Jun 2002 Posts: 508	Got the Jitters: Why Does This Happen? I put together a "slideshow" of still frames from my video which looked rock solid on my Vegas program, but when I burned it to DVD many of the still images have an unholy jitter. Why doe sthis happen? It looked perfect in the computer but once on the DVD it plays differently. Is there a pre-emptive way of preventing this before it goes to DVD? Or is it the player? Thanks for any insight.

April 18th, 2006, 07:15 PM	#2
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	Your TV is interlaced. There have been many posts on this topic. You might try turning on "Reduce Interlace Flicker" and adding a very slight blur to your images. Fine lines will definitely cause this. __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

April 27th, 2006, 02:10 AM	#12
Brian Shircliffe New Boot Join Date: Apr 2006 Location: Houston, TX Posts: 6	add motion blur Depending on how fast you are croping and panning your photos play around with the motion blur envelope in the video bus... add some keyframes to start increasing the motion blur the faster the motion gets. I at least use a .02 for the slow stuff and around a 5-6 for the faster stuff. Things might look a bit too blurry sometimes, so you may want to scale down the blur. I really wish the program would figure out realistic motion blur envelopes on its own for more realistic still picutre animation. For example I often go from a slow fadeing picutre into a faster one disolving back and forth.. makes is harder to get the high quality look of no motion blur... anyway.. maybe someone will write a script for this one day? I often fool around with the preview in player mode for hours to get the right amount per sequence. My other issue with this is that you just can't see what it will honestly look like on a TV from the computer unless you render it onto a DVD or VCD or video tape... I have my computer hooked up to a TV but the if the player skips even one field it totally screws up the whole "feel" of the motion.

April 18th, 2006, 07:53 PM	#3
Barry Rivadue Major Player Join Date: Jun 2002 Posts: 508	Thanks; I'm surprised though that some of the images are rock solid. It seems almost random.

April 19th, 2006, 12:00 AM	#4
Peter Jefferson Inner Circle Join Date: Apr 2003 Location: Aus Posts: 3,884	also be aware of the resolutions youre using in these pictures, as when Vegas downscales it can have some issues with super high res/dpi images

April 19th, 2006, 01:39 PM	#5
Bill Porter Major Player Join Date: Mar 2005 Location: Ventura, California, USA Posts: 751	Peter (or anyone), Any tips on what sizes/rezzes do work well?

April 20th, 2006, 03:22 PM	#7
Bill Porter Major Player Join Date: Mar 2005 Location: Ventura, California, USA Posts: 751	Thanks, man. Also I think you mean irfanview.

April 20th, 2006, 07:28 PM	#8
Mike Kujbida Inner Circle Join Date: May 2005 Location: Windsor, ON Canada Posts: 2,770	You're welcome Bill. And I did mean Irfanview. I knew I'd made a typo somewhere but couldn't see it staring at me :-(

April 20th, 2006, 07:40 PM	#9
Bill Porter Major Player Join Date: Mar 2005 Location: Ventura, California, USA Posts: 751	aint no thang! :)

April 21st, 2006, 12:27 AM	#10
Jim Ohair Regular Crew Join Date: Mar 2005 Location: Laguna Niguel, California Posts: 62	I don't remember who I got this from but it cured my problems with this completely. flicker....stuttering pictures In VMS 6, right-click on the event (each still photo), and select "switches", then check the box "reduce interlace flicker". One of the things I did to help alleviate the problem is to turn off 'Fast Video Resizing'. This is a check box that appears on the Render Settings screen when you go to Make Movie (at least in Movie Studio 4). It slows down the rendering, but also cleaned up some of the problems like you are describing. Also render at best quality instead of good.