Jumpy render!!!????

PaulVegasUser wrote on 11/18/2004, 3:03 AM
Hi folks,

I'm a newbie and need some urgent advice please. I know this is gonna sound dumb, but here goes:

I've created 1 minute videos from still jpeg pictures and used a zoom, crossover, pan, fade and zoomout. Nothing too clever here!
Anyway I then render them to WMV and find it is a bit jumpy. That's not too bad, but the client came back and asked if I could half the time frame. Like a d__khead I said no problems. Anyway, when rendering the squashed time frame to the newly rendered .wmv becomes really quite jumpy!.

I'm rendering in full size 720x480 cause the zoom needs some reasonable detail. I would prefer to keep this if I can so the projection looks crisp in the powerpoint presentation.

Help I'm desperate to work out what I'm doing wrong.

Regards

Paul

Comments

johnmeyer wrote on 11/18/2004, 7:49 AM
What frame rate did you use? You have to click on the Custom button in the Render As dialog and adjust things there. Many of the presets for WMV files are for frame rates less than 30 fps (NTSC), often at 15 or less.
PaulVegasUser wrote on 11/18/2004, 3:31 PM
Thanks for the reply John,

29 fps. But the jumpy bits are not through out. It has 2-3 small spots over the course of 60s. Other than that, it seems mostly smooth?? I've tried the best settings and several other variations. That doesn't seem to get rid of them.

I'm curious if rendering can be affected by the cpu speed. I understand this affects the preview process, but I didn't think this affected the render process. Anyway I run about 650Mg ram and turn of other background applications etc when rendering and wouoldn't have thought this would be a problem.

Any other suggestions??

Regards

Paul
SonicClang wrote on 11/18/2004, 4:31 PM
I've got the exact same thing happening! I came to check this forum to see if anyone had found the answer.

I've got three jpg 's in my video (a training video for work). 1.jpg is 264 kb and uses 118,559 colors. 2.jpg is 314 kb with 182,515 colors used. 3.jpg is only 201 kb and only 33,728 colors used.

I'm doing some pan/crop to move around these pictures as the narrator speaks and describes them. 1 and 2.jpg render perfectly... actually, surprisingly clear and vivid. 3.jpg gets all choppy and shows a bunch of strange pixels as it pans around.

I too have tried slowing down the speed of the pan, and it helps to a certain extent, but I have to keep up with the audio dialog and it can't take 20 seconds to move across the screen.
PaulVegasUser wrote on 11/18/2004, 8:48 PM
Interesting. I'm using a panorama of one picture that I'm panning across. How do you work out the number of colours in the picture? You see my shots are stiched. And it might be that the area of overlap has less colours than the other area's. My guess is this isn't at the heart of it but may cause it to work a bit better.

I'm going to try some various shots and see if I can repeat the problem on high quality shots.

Regards

Paul
SonicClang wrote on 11/19/2004, 4:53 AM
Are you stitching the pictures together in Vegas Video or are you using another program for that? There are many programs out there that can do that seemlessly.

By the way, I figured out the problem!!! :D yay!!! Listen up boys and girls.

All I had to do was right mouse click on the media in the timeline view, go to properties, and make sure "Reduce interlace flicker" is checked. Once that's checked everything is SMOOOOOOTH as butter at the time of render. I went through and checked every peice of media in my video, whether it was a video clip or a jpg. Everything looks much smoother. I can't wait to burn this to a DVD now.

I hope this helped!