• Adobe After Effects

  Horizontal pan of image gives Non-Smooth animaton

  Posted by Flumsie on January 4, 2006 at 11:37 am

  Dear all,

  I am panning a sharply scanned image from left to right on the screen. It respresents a film strip with scanned photos on there. The total image of the strip measures 3000×100 (h x v). It moves in a straight line from left to right.

  However, when exporting the composition, the filmstrip moves non-smooth, or bouncy. Any ideas on how to smoothen the pan? Cannot be that hard, can it?

  Thanks!

  Flumsie

  Luke Swain replied 20 years, 4 months ago 4 Members · 4 Replies
• 4 Replies

• 

  Noizzz

  January 4, 2006 at 12:01 pm

  hi,

  have you put on motion blur? if not, that could solve it.

  Does it stutter on the monitor? Do you work with fields? Exporting it interlaced could also smooten it, if I am correct.

  Grtz
  Noiz
• 

  Steve Roberts

  January 4, 2006 at 1:18 pm

  Those are good solutions, but if they don’t fix the problem, you may have the horizontal judder problem.

  In my opinion, this apparent juddering on constant horizontal motion is an unavoidable limitation of discrete frames or fields, one which the “persistence of vision” effect can’t overcome. Since the motion is regular and in a straight line, I believe our brain figures out the series of still frames pretty easily and can’t be fooled into thinking it’s seeing a moving object.

  If you can’t avoid it, I’d try to distract the viewer with other motion elsewhere in the frame, so his/her eye doesn’t linger on the scrolling images. Misdirection, in other words. 🙂

  I’d like to suggest frame blending, or echo, or adding a semi-transparent copy of the objects, but it might not change things, since all the objects on screen are moving at 30 frames (60 fields) per second no matter what you do.

  I’d go with misdirection, changing the animation, or, as a last resort, running it by the client and seeing if he/she finds it as annoying as you do. Sometimes they don’t, but get signoff just in case. 😉

  my 2 cents,
  Steve
• 

  Flumsie

  January 4, 2006 at 3:00 pm

  Thanks you both for your input! I will try the options mentioned, and as last resort, try to distract the audience 😉

  I’ll keep you posted

  Flumsie
• 

  Luke Swain

  January 4, 2006 at 8:51 pm

  Echo has worked well in that regard. Twixtor might help if you have it.

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