CGTalk - AVID > AE

og_reborn

05-20-2005, 10:39 PM

Hi,

Occasionally at work, an editor wants to export a clip to me from their avid for me to do some slight correcting/tweaking. There is inevitably a loss in quality when they bring the clip back into avid...sometimes there's weird RGB noise high-con areas like hair, other times it looks like the fields have been screwed up and the motion looks a bit weird.

I've tried rendering fields/no fields, 8 bit/16 bit... We do all the exports in uncompressed video, but avid works in a native compressed video format (our editors capture at 2:1), so there may not be anything that can be done about this.

I was just wondering if any of you have come across this hurdle in the past and had any suggestions to minimize the nasty after-effects (sorry bad pun) of the process.

Thanks! :beer:

slouchcorp

05-20-2005, 10:43 PM

theres an avid avi codec use that from AE for your renders

mike

scrimski

05-21-2005, 11:41 AM

Render out in uncompressed single frames(Tiff or Targa)

og_reborn

05-23-2005, 05:57 PM

Thanks, I tried the OMF format and that didn't really make a difference except it took longer for the avid to import than the uncompressed QT. As for the TIFF frames, I don't see how that would help, as an uncompressed QT is just as good in terms of quality...both are uncompressed...Is it better just because it's a frame sequence instead of a movie file? thanks.:thumbsup:

scrimski

05-23-2005, 06:10 PM

Actually there shouldn't be a difference, but I did a quick render test with a small animation in 3dsMax: 100 Frames with alpha-channel. QT file size was about 90 MB, Tiff-sequence was about 120 MB, so there is a kind of compression, although I can't see any difference at first glance.
Working with single-frame sequences has a few advantages when rendering an animation from a 3d application or AE as it is easier to delete or/and replace single frames in the sequence.

As for the OMFI-import delay I think that AVID imports and compresses the OMFI-QT again or anything like that, but I have no idea why.

risingone

05-25-2005, 11:28 AM

Theres an software called Automatic Duck that might help with these things.

2:1 isn't the best thing couse thats like the half of the resolution, you would like to work with 1:1 material. Try to consult with your editor to recapture the material for you to work with and then export your ready material using QT with animation codec using best settings.

I'v done some works with 2:1 material and then replaced them with 1:1 when the project is ready of online.

Hope this helps

XanderFX

05-26-2005, 07:14 PM

http://www.kenstone.net/fcp_homepage/porting_between_fcp_ae.html

I know that this is FCP to AE but maybe you can do some research at the avid site to see if they have the same sort of workflow

heres a site about codecs
http://codecs.onerivermedia.com/

good luck

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