Skip to main content
C
coolseattledude
Inspiring
September 18, 2021
Answered

Help! Zooming in on a still image produces jittery result

  • September 18, 2021
  • 2 replies
  • 3562 views

Hi guys, trying to create a slow deep-zooming video using a high-resolution TIFF, and the result is all shaky/jittery. I'm doing the zoom using the "scale" function in the fx motion panel, in "linear" mode. There is something wrong with the way PP is downressing the TIFF to create the video frames (using nearest neighbor interpolation maybe--is there a way to change to bicubic?), producing a result that looks like bad camera shake. I have done exactly the same thing before with the same image on previous versions of PP with no problem. I'm rendering .mov files using ProresHQ, 4k, and tried various settings (8bit v 16bit, max render quality versus regular) all with the same result. My zooms are from 100% out to 50% of the original image, should produce a perfectly smooth result. 2017 iMac Pro, Catalina 10.15.4. 

Correct answer coolseattledude

Solved! For anyone with this problem in the future: the issue was that my TIFF images were much bigger than the area that was being zoomed into, so there were a lot of extra pixels on the sides of the images that were confusing the scaling function. When I cropped the images in PS to a size that was only slightly larger than needed for my PP zooms, and re-imported them into PP, the problem disappeared. For reference, I am exporting at 4k and needed a 50% zoom-out, so the images needed to be 8k max size. My originals were 20k pixels wide (super high res photos) and this was more than PP could deal with.

2 replies

P
Pete12345whytho
Participant
July 7, 2023

The previous soulution didn't work for me. But I solved it differently: In fact, my picture slid in to a position which was 1293.2. The .2 caused the problem - apparently the position was jumping back and forth between 1293.0 and 1294.0. Setting the target position to 1293.0 eliminated the jitter completely. 

 

 

Cheers

Pete

B
Brand255C80
Participant
July 29, 2025

Setting shutter angle to 90 in the transform effect solved this issue for me. 

    C
    coolseattledudeAuthor
    Inspiring
    September 18, 2021

    Update: I looked closely at my exported result, and the mis-interpolation is happening on the right side of the frame. The left edge looks fine, the right side looks terrible, and the artifacts that are producing the shake are distributed across the frame from right to left. On the right side the whole image is displaced by multiple pixels from frame to frame, producing an effect over the whole image that looks just like camera shake. I tried rendering the whole video and applying warp stabilization, and it removes most of the shake, but that's a pretty hokey and time-consuming workaround. Any thoughts for how to create a smoother zoom into my TIFF image?

     

    C
    coolseattledudeAuthorCorrect answer
    Inspiring
    September 18, 2021

    Solved! For anyone with this problem in the future: the issue was that my TIFF images were much bigger than the area that was being zoomed into, so there were a lot of extra pixels on the sides of the images that were confusing the scaling function. When I cropped the images in PS to a size that was only slightly larger than needed for my PP zooms, and re-imported them into PP, the problem disappeared. For reference, I am exporting at 4k and needed a 50% zoom-out, so the images needed to be 8k max size. My originals were 20k pixels wide (super high res photos) and this was more than PP could deal with.

    Terms & ConditionsAccessibility statement
    Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices