field rendering issues AL 7 - Encore DVD 2
by Mark Harvey (mark harvey)
on
Feb 28, 2006 at 1:29:11 pm
Please help....I've searched the archives but can't really find what I am looking for.
I am creating a looping DVD from work that I have done, and some work that was sent to me.
The work that I create is rendered commercials from After Effects 7, and one from After Effects 6.5
The commercial from 6.5 is an uncompressed AVi rendered in lower field first. It looks great when on DVD.
The other commercials that I received are also uncompressed AVI lower field first...they also look great.
The commercials that I did in After Effects 7 are a mixture of video (DV based from Avid Liquid) and grahpics. When I render these commercials lower field first in AFter Effects, they look terrible on the DVD. I can physically see the field-reversal. The video has been properly interpreted (lower field) in AFter Effects.... The problem with fields is NOT just on the video, but all of the graphics also show field problems. My compositions in AFter Effects are all 29.97 720x480. I believe that the other commercials are 720x486. Could this be the issue ???
I have not a found a place in Encore to specify field dominance. I have checked in the Interpret footage dialog box and can only find aspect ratio settings. I have the production studio...should I import the After Effects comps directly into Encore, and let Encore do the rendering...will that change anything ???
Thanks for any help you can give.
PS...I have searched the manual to no avail. I have also posted this to the encore forum
Re: field rendering issues AL 7 - Encore DVD 2 by Steve Roberts on Feb 28, 2006 at 1:47:20 pm
Here's what my pea-sized brain thinks it knows:
- NTSC DVDs are always lower field first, 720x480.
- Encore's encoder might need 720x480 source. You should try dragging your 486 clips into a 480 comp, (no field separation), then moving the footage down one pixel. Do not scale the footage. Render uncompressed with no fields. AE will preserve all field information in this situation -- don't worry. By rendering this way, you're basically passing the footage through AE with minimal intervention, just lopping 2 pixels off the top and 4 off the bottom. (.. or you could move it up one pixel. Doesn't matter.)
- You're talking about field order, not field dominance. Field dominance is used in NLEs when determining on which field a cut is made. FCP and other app docs use "dominance" incorrectly, when they should use "order". :)
- Sorry, I use DVD Studio Pro, so I can't help with Encore issues. You might want to try their COW forum if we can't help here.
Re: field rendering issues AL 7 - Encore DVD 2 by Mark Harvey on Feb 28, 2006 at 1:58:56 pm
Steve,
Thanks for the reply. The problem is that only the 720x486 sources look good...the 720x480 don't. Do you think that maybe I should try rendering the 720x480 to a 720x486 comp ???
I am at work at the moment, this on my home business computer. I will try to fix it up tonight. I can always render without fields, but it is not an option that I particularly want to use.
I have also noticed that anything that I render as lower field first in AE7 wants to use upper field first once on a timeline back in Avid Liquid7.
Is it possible that there is an issue with AE7 on a PC that could reverse fields at the render ???
Re: field rendering issues AL 7 - Encore DVD 2 by Mark Harvey on Mar 1, 2006 at 12:54:40 am
Steve,
Thanks for your help. I got the DVD to work. I let Encore do the After Effects rendering via Dynamic Link. I also reduced the max bit rate and now the DVD looks good. The max bit rates seem to vary...go figure...set a max of 8mbs and sometimes the player would spike to 10mbs....
