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Files Become MASSIVE Upon Rendering!
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| Rick_Starsick@adobeforums.com 2006-12-06, 8:14 pm |
| I have the Adobe Production Suite with all the latest hotfixes installed, and just noticed something unusual on my most recent projext for a client. My workflow would consist of editing in Premiere Pro, and then rendering a final clip in AE, often using M
agic Bullet Look Suite to "soften" the edges of my shots and make them appear more film-like. No troubles in the past, but now when I render an 855MB file in AE (using Look Suite, applying ONE filter) it now becomes 7GB! A 3 GB clip becomes 63 GB, and so
on. I have never recompressed viseo in Premiere upon export, and try to never to do the same with AE, for sake of quality - but - I will run out of HDD space on even the simplest projects at this point. The only alteration I have made in workflow is that
instead of exporting audio back out at the default rate of 44.1 KHZ, I export at 48KHZ for compatibility in Premiere on final assembly in my DV projects.
Any ideas....this can become a real problem.....in the past my files were nowhere near this huge....
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| Rick_Gerard@adobeforums.com 2006-12-06, 8:14 pm |
| Read the help files on rendering.
When you re-comporess in Premiere you re-render every frame, if you don't re-compress, only the frames that you've done something to, like add a title or where there's a transition, are re-rendered. The codec doesn't change so the data rate doesn't change
from the original video files. There is no similar option in After Effects because AE isn't a NLE it's a compositing / motion graphics app.
To keep the same file size pick the same codec in the output options of the render queue. I see that you're using DV in Premiere. Sounds like you're selecting uncompressed in AE.
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| Kuock@adobeforums.com 2006-12-06, 8:14 pm |
| I've noticed the same problem.
I've read in several forums that I must render the AE projects to a lossless format in order to maintain the image quality before importing within Premiere.
What's the right way to do it?
What I want to do is creating compositions in AE and later import them within Premiere without quality loss (or no too much loss)
I work with DV footage. Must I render to lossless or DV...?
I'm concerned with quality not file size.
Thanks very much
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| Rick_Gerard@adobeforums.com 2006-12-06, 8:14 pm |
| If you're going to process footage another time then render you interim clips with a lossless codec. By this I mean if you're going to color correct or do some significant manipulation to the clip you should be very careful of compression artifacts.
If you going to just bring the finished clip back into Premiere or any other NLE and output the clip to tape with no further manipulation, render to the same codec you used to capture the clip. Simple as that. Just adding transitions between shots doesn't
count as significant manipulation.
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| Andrew_Yoole@adobeforums.com 2006-12-06, 8:14 pm |
| Ultimately, if your goal is to maintain the highest quality, then you must use lossless codecs. The result of this is huge file sizes. That's the cost of quality. One commercial DVD authoring job in my facility will typically require around 300GB of stora
ge space.
Basically, if you want to keep the quality high, buy more drive space.
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| Kuock@adobeforums.com 2006-12-06, 8:14 pm |
| Thank you guys,
I think I'll render with a lossless codec in order to keep the quality.
I'd like to make you a few more questions.
It's true that the lossless files are huge and I wonder: why does a 45 Mb DV clip become a 2 Gb file after rendering it with a lossless codec?
Shouldn't the output file be the same size as the input one? That's the meaning of LOSSLESS. From where does AE add all that data that is not present in the original file?
To finish: Can Premiere handle those huge files rendered with a lossless codec in AE?
Thak you for your help again :)
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| Rick_Gerard@adobeforums.com 2006-12-06, 8:14 pm |
| Lossless refers to compression. Think of a jpg for an example. Jpeg is a lossy compression scheme. This means something has to go if you want smaller file sizes. You can save a jpg with a low quality setting and get a file size of say 1 MB or at the highe
st quality and get a file size of say 10 mb. Open up the two different images and you'll see a huge difference in the quality of the compression.
DV is compressed so the data rate is 25 MB/sec. They go through lots of tricks to get the data rate this low. At 25MB/sec 10 minutes is about 2.7 GB. Change that same file to 8 bit uncompressed and the file size is about 12 GB. Upgrade the video to 10 bit
and you're talking 17+ GB for 10 minutes.
Premiere, Final Cut, and lots of other apps can handle uncompressed or lossless compressed files just fine but they will have to render previews before playback will be smooth.
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| Kuock@adobeforums.com 2006-12-06, 8:14 pm |
| I begin to understand...
Thank you Rick :)
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