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New compression question

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Lisa SimonsonNew compression question
by on Jun 20, 2010 at 8:23:56 am

Hi:

I'm rendering a 1920 x 1080 24 HDTV 45 sec clip using animation compression. Lots of 3D layers and render time is an estimated 23 hours, argh! Final animation to be used in conjunction w red camera footage.

Its late and I'm getting really confused! If anyone has any suggestions or can point me in the right direction I would be ever so thankful!



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Lisa SimonsonRe: New compression question
by on Jun 20, 2010 at 9:00:34 am

Wondering if rendering out as tif sequence and re-importing would be better?


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cowcowcow
David JohnsonRe: New compression question
by on Jun 20, 2010 at 1:25:07 pm

I haven't used image sequences in quite a while so I can't speak on that and don't necessarily have a solution for you, but will mention a couple things that may be helpful ...

The render times AE shows are only estimates based on the current frame it is rendering ... it's basically telling you how long the render will take if all subsequent frames are the same as the current one. So, if your project opens with many stacked 3D layers with many effects and masks, then levels off a bit, the initial render time shown will drop dramatically.

Similar to the first point, I've recently done AE to FCP projects with similar specs (except the 24fps) and, when I brought my AE render (PNG rather than Animation) into my FCP timeline and went to render the FCP sequence, it initially said something like 20 hours, but it actually finished in only a couple of hours.

In any case, it sounds like your project is pretty render intensive (HD, lots of 3D, etc.) and you're on a G4 so is it possible your machine just doesn't have enough processor power, RAM, fast enough drives (for both read and write) or some combination of all those?


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Lisa SimonsonRe: New compression question
by on Jun 20, 2010 at 4:34:12 pm

I appreciate your help!

I have rendered fairly large projects from this computer before. This time though I maybe went a little overboard. The comp is made up of pre comps and only a few are 3D.

My computer:
Dual 1.25 GH powerPC G4 2 MB L3 cache per processor
memory 2 GB DDR SDRAM

Would enabling disk cache set to en external HD work? Last night the render crashed my computer after 5 hours with only 7 seconds completed.

Eeeesh!

I wouldn't be freaking out if the deadline wasn't looming just over the horizon.


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Joseph W. BourkeRe: New compression question
by on Jun 20, 2010 at 4:53:37 pm

Lisa -

This is where rendering to a .tif, .tga, or .png sequence will be your friend; if your computer crashes, you'll still have all the stills prior to the still the crash occurs on, so you will only have to resume at the still following the crash. It may not speed up the process, but it will at least get you to the finish line. Good luck!


Joe Bourke
Creative Director / Multimedia Specialist
B&S Exhibits and Multimedia
bs-exhibits.com


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Lisa SimonsonRe: New compression question
by on Jun 20, 2010 at 5:09:37 pm

I will try that Joe!
If the computer crashes after 7 sec or so and I begin the tif render again @ current frame in timeline will the tifs still be in sequence?

Thanks!


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Joseph W. BourkeRe: New compression question
by on Jun 20, 2010 at 6:17:57 pm

If the computer crashes, just check in the folder where your sequence is stored, and see what the last numbered still is (example: "image0008.tif" is the last number - you would restart your render at frame "image0009.tif") and continue incrementally from there. At each crash, start from the next numbered still after the last one that rendered successfully.

Here's something to check out that may be causing your crashes - there are "secret" settings in AE, which allows you to set the size of the render cache, so that as you get nearer the RAM limit, rather than crash your system, the cache gets purged every "x" frames. From a website which explains it in detail:

"If you are getting rendering errors it might be the codec that is hogging RAM. If you enable "Purge every 20 frames during Make Movie" you will probably get around the problem. You can do this in the Secret preferences by holding down the Shift key and then select Preferences... from the menu. In the Preferences dialog box you can then choose the "Secret" option that will give you hidden features (they are hidden since they will cause AE to render more slowly.)
Don't enable the other checkboxes, just write "20" in the text field. Also, make sure you enable the "Prevent DLL Address Space Fragmentation" under "Memory & Caches" if your on a Windows system."

Give the above method a try, and you may be able to continue on rendering media files instead of still sequences. I set my secret settings at "purge every 20 frames" and I haven't had a render crash since. Good luck!


Joe Bourke
Creative Director / Multimedia Specialist
B&S Exhibits and Multimedia
bs-exhibits.com


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Lisa SimonsonRe: New compression question
by on Jun 20, 2010 at 6:43:41 pm

Wow, really good to know!
As soon as I back up my project I'll try it. Also learned that my final output doesn't need to be so big. Not sure how to make this HD comp smaller size while maintaining hi res.
making it smaller could also help ( I'm hoping! )


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Joseph W. BourkeRe: New compression question
by on Jun 20, 2010 at 8:04:18 pm

Lisa -

One last thing that it's good to know...you may want to output your final comp at the highest possible rez, then render your delivery versions encoded from Adobe Media Encoder. It generally does a better job than straight out of AE. I always render my "master" from AE or Premiere as uncompressed Quicktime at whatever size my footage was created/shot at (usually 1920 x 1080P). Then I use Media Encoder with presets for my various delivery formats. It gives me a master that can then be down-rezzed for whatever my needs are, from the web to DVD projects.


Joe Bourke
Creative Director / Multimedia Specialist
B&S Exhibits and Multimedia
bs-exhibits.com


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