jittery stills

lynj wrote on 12/30/2003, 3:21 PM
I know some of you guys who edit wedding videos have got some solutions for me. I am rendering a piece that overlaps slow motion video with stills. I am getting jitters on most of the still. I also get some jerks in the video.

I am using settings recommended by a user in this forum that seem to work for slo mo alone most of the time: Event: Force resample (reduce interlace flicker NOT checked. Project properties: Best quality,Interpolate fields, Gaussian blur. Video Bus: Supersampling 3, Motion blur 2

The quality I am getting with slow motion and still in general is unacceptable for a product to sell (or for my home videos, for that matter). If you've got this figured out, please help me. thanks.

Lyn

Comments

Spot|DSE wrote on 12/30/2003, 3:32 PM
For the stills, you'd want reduce interlace flicker checked. What size are the stills? If they are super high resolution with lots of contrast, it may be that you've got some buzzing due to illegal colors.
Have you rendered any of this out? DV shouldn't have any jerk at all. You've got the right recipe for the slo mo, but if you're not happy with it, the next question becomes "how slow are you trying to go?"
lynj wrote on 12/30/2003, 3:41 PM
Spot, thanks for the speedy reply. I'm bringing the preview up to full res and snapping the still. I am not editing the still at all except to put them in the timeline overlapping sometimes with slow motion video and sometimes with other snapped stills. I am using Spicemaster transitions between stills on some of them and on others, just dissolves. I am rendering the whole piece, about 3 minutes, at one time. I do not have reduce interlace flicker checked on the stills, but I do have force resample on. My next trial will be to turn that on. Will the supersmappling & motion blur I use on the project properties hurt the stills? Should I render all the stills separately then re-edit them into the slo mo scenes?

Lyn
Spot|DSE wrote on 12/30/2003, 4:16 PM
No, you shouldn't need to render the still separately. My question about resolution is related to the scanned or digital resolution and size of the stills originally. If the stills are too high a resolution, contain illegal colors, it can easily create artifacts.
Another trick is to drop a blur on the stills at a value of around .002 or so. You should see a significant difference in just doing that.
eejackson wrote on 12/30/2003, 5:08 PM
Dear Spot:

I was reading this thread and the advice you were giving to this user. I had an addtional question for you or anyone else who may want to respond. I just did a family Christmas video ( about 10 minutes long) which consisted of both video and high res stills. I too, had a few stills that jittered or a little section of the still appeared to be shaking when rendered out to MPEG-2 and then burned to DVD via Vegas DVD-A. As you mentioned above in the thread, the still may have constisted of illegal colors. My question is : Would opening the still in a program such as Ulead Photo Impact and applying the effect: Adjust For NTSC Video; resolve this issue or perhaps make the jittering or shaking less noticable in a still consisting of illegal colors???? I'm pretty new at all this and I certainly don't know a whole heck of a lot about what is legal and what is not.....so, just thought I would ask.
Thanks
Lori J.
Spot|DSE wrote on 12/30/2003, 6:00 PM
I sure wouldn't trust Photo Impact's NTSC filters, only because I've had problems with it myself. Use the Broadcast filter in Vegas, dropped onto generated graphics, stills, and anything that wasn't DV to start with. It's the Broadcast Filters, and you should be fine with NTSC-Lenient. You can also drag/drop that filter on your Preview window, the only downside is it will add some time to your final render.
TomG wrote on 12/30/2003, 6:54 PM
I agree with SPOT on the blur ... I had the same problem and used .003 G Blur and it took the jitters right out

TomG
cheroxy wrote on 12/30/2003, 6:55 PM
I too have always wanted to know that, but I never think to look it up until the DVD is burnt and I am away from my computer watching the flickering take place.
thanks
lynj wrote on 12/30/2003, 9:13 PM
I'm getting intermitant jerks in rendered video. When I rerender it could be gone or in another section. It is not consistant. Any suggestions? This slo mo thing is so frustrating, because I use it a lot.

I am using settings recommended by a user in this forum that seem to work for slo mo alone most of the time: Event: Force resample (reduce interlace flicker NOT checked. Project properties: Best quality,Interpolate fields, Gaussian blur. Video Bus: Supersampling 3, Motion blur 2

Thanks,
Lyn