Pan/Crop yeilds unwanted wavy / shimmering effect

browdl wrote on 5/25/2009, 1:42 PM
I have tried using pan / crop to accomplish a slow zoom effect on a still image. I have set two keyframes (one at the start and a second at the end). I've set interpolation to smooth (as well as tried other settings.

The end result is awful - the image details shimmer and zoom appears sort of wavy.

Any ideas what I may be doing wrong?

Thanks!

Comments

musicvid10 wrote on 5/25/2009, 1:46 PM
Set your rendering quality to "Best."
You can do this in either your Project Properties or in your render Custom Properties.
Terry Esslinger wrote on 5/25/2009, 3:21 PM
What size was your still image?
BTW the smooth setting on the keyframe means a slower starting and ending than the middle. Not a constant speed, in case that was what you were wanting.
browdl wrote on 5/25/2009, 3:33 PM
Thanks, I just tried that but it didn't change the shimmering. The image almost looks "psychedelic" as it zooms in. Any other thoughts? I am new to this software, and really will appreciate any advice.
musicvid10 wrote on 5/25/2009, 4:00 PM
Can you upload your image somewhere and tell us your render settings?
Terry Esslinger wrote on 5/25/2009, 4:07 PM
You did not give the size of your still image!
And how far are you zooming?
valleyite wrote on 5/25/2009, 10:35 PM
I'm having the exact same issue and have not been able to resolve it. When using keyframes and zooming in on a still, it appears fine in the preview window but when I watch it on DVD it's almost unwatchable due to the shimmering effect. To use an example, if a body of water is shown in the picture it shows as moving ripples when zooming in.

Perhaps someone has a solution.
browdl wrote on 5/27/2009, 11:21 AM
Terry,

Here is the info on the still image:

Format: jpeg
resolution: 356
image size: 5" x 7"
file size: 1.2 mb

In my experience with other software, this is sufficient resolution to pan smoothly and render a proper image on DVD.

The keyframe settings are:

Keyframe interpolation / smoothness 100%
Maintain aspect ratio: yes
Stretch to fill frame: yes
zoom% 17.3

project info:

render as video for Windows (*.avi)
Properties:
width: 720
Height: 480
Field order: Lower field first
Pixel aspect ration: 0.9091 (NTSC DV)
Full resolution rendering quality: best
Deinterlace method: Blend fields (have also tried interpolate)

Valleyite is describing the same phenomenon - I get the exact same effect on rippling water.
fishbelt wrote on 6/3/2009, 7:32 AM
I had the same problem when I up load a video to youtube (wmv). When I burned it to disk it seemed ok. ( mp2)
Ivan Lietaert wrote on 6/3/2009, 8:25 AM
Right-click on the picture and select 'reduce interlace flicker'. That should do the trick.
dogwalker wrote on 6/3/2009, 9:46 AM
I see this on any slideshow I create which includes panning and zooming, particularly if there's something like foliage in the scene.

If I reduce interlace flicker, the image gets badly soft. I think I'll try again, though.
Ivan Lietaert wrote on 6/3/2009, 9:59 AM
Also, reduce the size of the still images. Keep in mind you still want to be able to zoom in, but there is no need to to have huge files.

edit: Do all of the following:
- Right-click on the picture and select 'reduce interlace flicker'.
- On the Video tab of the Project Properties dialog, choose Interpolate Fields from the Deinterlace Method drop-down list.
- When rendering, on the Video tab, choose None (progressive scan) from the Field Order drop-down list.