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Duplicated COMPS taking ages to render

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Lachlan FletcherDuplicated COMPS taking ages to render
by on Dec 4, 2012 at 12:24:08 am

Hey all,

I am using cs6 and ray tracing. I have a comp that is 15sec in length. When I render this out its fine at around 14hours. My system has only the GPU Graphics card that came with the Macbook Pro so I understand why its so slow. The problem is when I duplicate that comp and change it. The resulting comp is 7sec but the render time is 40+ hours.

Im reasonably new to ae and am wondering if the second comp is referencing the old or something like that to cause this issue?

Many thanks for any help.

Lach


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Dave LaRondeRe: Duplicated COMPS taking ages to render
by on Dec 4, 2012 at 3:20:28 pm

[Lachlan Fletcher] " The problem is when I duplicate that comp and change it. The resulting comp is 7sec but the render time is 40+ hours. "

Well, you said it yourself: you CHANGED something.

However, you didn't tell us about the nature of that change. Thus, we have no information to help us answer you.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 4, 2012 at 10:21:56 pm

Hey Dave thanks for the response,

Sorry when I said I changed something I just meant the camera movement. I used that long Comp as a base and made some smaller comps out of that, focusing on different aspects of the item I animated.

Here is an example of what Im doing. The animation is at the start.

https://vimeo.com/53062819

Thanks again Dave

Lach


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Dave LaRondeRe: Duplicated COMPS taking ages to render
by on Dec 4, 2012 at 11:08:08 pm

I'm sorry, but I can't see it: it's password protected.

If you're NOT using multiprocessing, that's good: otherwise, you could have bad memory / processor allocations, which slow things down.


I'd be tempted to do the following:
  • duplicate the AE project file, open the new one
  • alter the camera animation to match your change in the problem comp
  • add the altered comp to the render queue, and observe the time it will take


Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Walter SoykaRe: Duplicated COMPS taking ages to render
by on Dec 4, 2012 at 11:41:04 pm

[Dave LaRonde] "If you're NOT using multiprocessing, that's good: otherwise, you could have bad memory / processor allocations, which slow things down."

FYI, the ray-tracing renderer doesn't use multiprocessing like the classic 3D renderer does. The ray-tracer will render a single frame at a time, but it will render it using all cores.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Walter SoykaRe: Duplicated COMPS taking ages to render
by on Dec 4, 2012 at 11:38:21 pm

[Lachlan Fletcher] "I used that long Comp as a base and made some smaller comps out of that, focusing on different aspects of the item I animated. "

Do you now have multiple copies of the comp, all stacked and nested together somewhere? If so, that could explain your render issue: each instance of the comp needs to render separately.

Any chance you can post a screenshot of your UI and timeline?

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Conrad OlsonRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 2:22:35 am

If you are changing the camera animation do you have motion blur switched on? I don't know how the motion blur is calculated but it might affect render times.

---

conradolson.com


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Walter SoykaRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 2:51:17 am

[Conrad Olson] "If you are changing the camera animation do you have motion blur switched on? I don't know how the motion blur is calculated but it might affect render times."

Great point. Ae uses multiple samples for motion blur, and that's driven by the quality slider in Composition Settings > Advanced > Renderer: Options. That dialog box will tell you how many motion blur samples will be used with the current quality settings.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 3:11:45 am

Thank you everyone for your help. Sorry about the vimeo password I have taken that off now. The link is
https://vimeo.com/53062819

HEre is a screens shot as Walter suggested.



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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 3:15:27 am

Sorry guys thats an image of the full sequence not the short versions. Here is the Short comp.



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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 3:21:19 am

I would like to say by the way, that I really get alot out of this forum. It has taught me so much as Ive been learning ae over the past year, so thanks you guys especially the regulars. Im sure all the other forum readers feel the same too.

Lach


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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 3:58:11 am

Thought I might share with you my Pref page to see if there might be a prob there. It says actual cpus used 0!! That doesnt sound right. You can probably tell Im on a steep learning curve & bing patient for a new machine with a good graphics card etc.




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Walter SoykaRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 5:13:40 am

I'd suggest changing your multiprocessing settings to match the recommendations [link]: leave 2 GB for other applications and reserve at least 1.5 GB per background CPU. I'd also leave 2 CPUs available for other applications.

Since your system is somewhat RAM-limited, you may sometimes get faster renders with multiprocessing off than you would with it on.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 7:50:57 am

Thanks Walter


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Lachlan FletcherRe: Duplicated COMPS taking ages to render
by on Dec 5, 2012 at 8:36:08 am

Hey Guys,

Thanks again for all your help. I finally found the answer after going over all the posts. On of Walters refereed to the quality settings with regard motion blur. Well I found for some reason the quality settings had changed (by me probably but I cant think why I would have) to 12. Obviously with my poor little macbook pro that was too much for it to handle. Ive taken it to 3 to see if thats acceptable 7 its taken the render time to 3 hours from 50 hrs, much better.

Many thanks again.

lach


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