ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

Panning around a zoomed 6000 x 4000 image - killing rendering speed

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Johnson Abercrombe
Panning around a zoomed 6000 x 4000 image - killing rendering speed
on Mar 31, 2010 at 7:47:35 am

Hello everyone!

I am attempting to make an animation that was planned by having the camera zoomed up close to a very large "canvas" (a 6000 x 4000 composition in after effects). However my rendering speed drops through the floor... less then 1 frame per three seconds, even though I am only rendering a small part of the canvas at 720x480 resolution( ????).

However, even if i put a mask around ONLY the active view that the "camera" is looking at to disclude everything else in the canvas... it seems like AE wants to render the entire canvas every frame.

Is there any way that i can get AE to only render the part of the canvas that my active view is currently looking at? Here are two pictures to show you the situation:

1.http://i980.photobucket.com/albums/ae284/Mavor101/Zoomedinview.jpg - This is the view when i am moving my point of view around to animate.

2.http://i980.photobucket.com/albums/ae284/Mavor101/Zoomedoutcanvas.jpg - This is the overall view of the massive 6000 x 4000 canvas. Strangely, my AE renders this faster (at 6000x4000) then if i render the smaller view animation at 720x480 featuring only a small part of the canvas.

Any ideas why AE is choking and how i can fix it? Thank you!


Return to posts index

Johnson Abercrombe
Re: Panning around a zoomed 6000 x 4000 image - killing rendering speed
on Apr 1, 2010 at 6:52:37 am

no ideas?


Return to posts index

Jon Bagge
Re: Panning around a zoomed 6000 x 4000 image - killing rendering speed
on Apr 3, 2010 at 11:11:58 am

AE needs to keep the full size of each layer in memory, even if you're only rendering a small portion of it. You don't say anything about what computer you have or how much memory, so it's a bit hard to tell if that's the issue.

You can reduce the layer size by using 2 or 3 much smaller layers at different scales. So for example you could do one resize to 3000x2000, and one crop to 3000x2000. Scale the cropped layer down so it fits exactly over the scaled layer, then parent them together.

This excellent tutorial http://www.videocopilot.net/tutorials/earth_zoom/ from Video Copilot shows you the technique.

Alternatively you could just reduce rendering resolution for previews to 1/4 or 1/9, then just stomach the long wait for the final render.



--------------
Jon Bagge
Editor - London, UK
Avid - FCP - After Effects


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]