Frame Blending a Pre-composed layer?

[Remy Mainz]

HI Dave

Am I wrong then in thinking that AE renders a precomposition frame before it becomes a layer in another comp?

I have 4 time lapse animations shot on dslrs that were shot at 1 frame every 5 seconds and are between 8000 and 10000 frames each, making over 5mins each at 25fps 1080p.
I need to make the final film edit at under 15 minutes where they currently make 23 mins in total.
I can make uncompressed masters of each section but that will take up a huge amount of space and extra time.

thanks
JG

[Jonathan Shohet]

Even though the frame blending layer switch is disabled in case of a pre-composed layer, if you the enable frame blending layer switch in the original composition containing footage, it will keep this setting when nested. You need of-course to enable the master frame blending switch for the composition as well.

Also, I would also suggest you use “interpert footage” on the original image sequence in the project panel with a higher frame-rate if you want it to run faster. Frame blending sped-up footage could result in some pretty funky/horrible results…

[Remy Mainz]

thanks Jonathan
thats what I need to hear

Dave, It was not an issue of pre planning as I will use the original material as is for an art installation but the single screen edit is the result of all the best material and there was no way of knowing how long it would end up. Worst case scenario I will make it all 50% and no-one will ever know.

The issue at hand is that pre-compose should really work like a pre-render and because it is not, for what ever bizarre reason, then there should be a pre-render option as well. If something is pre-composed then it will have a frame rate already embedded in it as as such should be frame blendable!

thanks again
JG

[Jonathan Shohet]

“pre-compose should really work like a pre-render and because it is not, for what ever bizarre reason, then there should be a pre-render option as well”

I’m not sure I follow you on that one…
You can do that by going to the “Composition” menu and selecting “Pre-render”.
However, pre-rendering is effectively exactly the same as rendering, something you said you did not want to do, to conserve time and disk-space.
The difference between Rendering and Pre-rendering is that in the latter AE automatically applies a post-render action to import the resulting render and replace usage of the rendered composition in the project with it.

[Remy Mainz]

thanks i didnt know that was there but as you say that doesnt speed things up.

what i meant by pre render was the same as pre compose but where the new layer is treated exactly like a footage layer as if it had been rendered , ie pre rendered it. That would be the equivalent of pre rendering.

JG

[Will Cox]

Dave I clearly don’t think you understood what he was asking…