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Should my Render times be faster?….
Hi there,
Just wondered if someone might be able to clear something up for me…I have a 6144 x 768 comp.
I want to export the right hand side half of this comp (3072 x 768)However I also want to make the size of the new comp 3840 x 1024.
So I create the new comp at 3840 x 1024.
I put the 6144 x 768 comp into the 3840 x 1024 and position it correctly and scale it correctly so it fits in the new comp.I then turn off the layers that are on the left hand side and will not be visible once exported.
And then I set up the render.
When I export the 6144 x 768 the render took 11h35 minutes on my iMac.
When I exported the 3840 x 1024 comp, with the same export settings it too 12h35mins.Am I correct in thinking that the 3840 x 1024 export should be quicker as the composition is smaller therefore the computer has to create less pixels, and also there are less layers for the computer to render out, therefore less work?
I am a little confused as to why it took longer and would be very grateful if anyone could shed some light on this for me.
Many thanks
Martin.P.S. If my explanation was not clear enough or you require further information in order to understand what I’m talking about then please feel free to ask!
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4 Replies
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AE is creating the entire frame in the upstream comp and then rescaling it to fit the new one. You’re rendering twice. Your second comp is not much smaller, only about 80%, than the first comp (3.9 million pixels vs 4.7 million) and that will not translate directly to reduced rendering time.
The only way to save rendering time is to prerender as much as you can or use networked rendering or get a faster machine.
bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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bogie is right, you are actually making ae do a bit more work for the smaller comp… it has to calculate everything in the larger comp, then scale it in the smaller comp. it has to do that for every frame, so the time should be slightly longer.
one other thing, you mentioned ‘export’. if you have cs3, a multiple core mac and have multiprocessing enabled, you should get faster renders by not using file>export but by using composition>make movie or add to render queue… the render queue will use ae’s ‘render multiple frames simultaneously’ option, while export will not.
i still have to use file>export to create dv files for one machine that we have here, i have found that exporting a file takes around 4x longer than rendering the same files on an 8-core macpro. it’s actually faster to render the file via the render queue, import the render and export out the dv file than it is to export straight to dv…
just an fyi if you are useing file>export….
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Thanks for your comments, looks like I’ll have to stick with the longer export times for the moment as I don’t have time to pre-render sections.
Sorry for the confusion too, but I meant Make Movie when I said export, I always use the make movie way, just got my lingo mixed up form using other video editing software!
Thanks again,
Martin -
[Martin Banks] “looks like I’ll have to stick with the longer export times for the moment as I don’t have time to pre-render sections. “
(joke follows)
There is a simple mathematical formula to determine the falseness of this statement.
Pre-rendering is ALWAYS a shortcut.bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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