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fields are kicking my bum!!!!
1) I have shot some footage with a DV camcorder that records on DVD
2) I extracted the footage on to my hard drive using DVD2AVI (brought it in uncompressed)
3) Upon input into After Effects it separates the fields as “lower”
4) I edit the video adding motion graphics etc.
5) I render out on lower fields to a m2v file.
6) Open it up in Adobe Encore.
7) Burn to DVD using the NTSC preset for lower fields.
8) Play it back on a plasma screen
9) Stuttering and jaggies = poopy looking video10) Pull out remaining three hairs.
11) get a bright idea!
12) Turn off the field interpet setting in After Effects
13) Render out of After Effects using NTSC progressive scan setting (i.e. no fields)
14) Bring files into Adobe Encore
15) Burn to DVD using the NTSC preset for progressive. (no fields)
16) Play it back on a plasma screen
17) Stuttering and jaggies = poopy looking video!18) Glue in 3 pulled out hairs just to pull them out again!
What am I doing wrong??? Do I need to interpet the footage in After Effects as lower fields and then every other render (output out of AE, and Encore DVD seetings) would be progressive (haven’t tried this yet)
Is there a rule of thumb for taking video from a DVD that was shot standard def, editing it a bit, and then spitting it back out to DVD. Most everytime I do it the field issue rears it’s ugly head.
Help a brother out and I’ll put in a good word for you with Pamela Anderson (no not that one, the ugly lady who works the late shift at 7-11)
Perhaps I should have become a ditch digger…
Darren
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7 Replies
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If it looks good in adobe encore and crappy when you burn it then I would think it has to do with the encoding settings in Encore.
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Hmm…Sounds like a field dominance issue to me. Did you try rendering out with upper-field first? It’s possible that the camcorder recorded your footage as upper-field, which would mean that rendering out lower-field first you reversed the field order which would explain the stuttering motion. Unfortunately, it’s pretty much impossible to tell what your field dominance is on your computer monitor, being that it is a progressive display. This is also true for you plasma monitor. The best way for you to find out what type of footage you have to render out a few seconds, one set to upper-field and the other set to lower-field. Burn it to DVD, then play it on a Standard Definition CRT television. Which ever one playback smoothly is what your camcorder records footage as. This is not entirely uncommon…we have a real-time MPEG-2 encoder here that crops D1 NTSC (720×486) footage to 720×480 by removing 3 pixels from the top and 3 from the bottom. Which winds up making our once lower-field dominant footage upper-field.
By the way SD CRT TVs are the best way to look at interlaced Standard Def footage. It’s the only way to tell if you having field issues, jittery pixel thin lines, if your colors ore bleeding, etc.
Hope this helps and good luck
Michael -
Hmm…Sounds like a field dominance issue to me. Did you try rendering out with upper-field first? It’s possible that the camcorder recorded your footage as upper-field, which would mean that rendering out lower-field first you reversed the field order which would explain the stuttering motion. Unfortunately, it’s pretty much impossible to tell what your field dominance is on your computer monitor, being that it is a progressive display. This is also true for you plasma monitor. The best way for you to find out what type of footage you have to render out a few seconds, one set to upper-field and the other set to lower-field. Burn it to DVD, then play it on a Standard Definition CRT television. Which ever one playback smoothly is what your camcorder records footage as. This is not entirely uncommon…we have a real-time MPEG-2 encoder here that crops D1 NTSC (720×486) footage to 720×480 by removing 3 pixels from the top and 3 from the bottom. Which winds up making our once lower-field dominant footage upper-field.
By the way SD CRT TVs are the best way to look at interlaced Standard Def footage. It’s the only way to tell if you having field issues, jittery pixel thin lines, if your colors ore bleeding, etc.
Hope this helps and good luck
Michael -
Hi Darren,
try playing around with Encore, not with AE. If it
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Hmmm, if it is DV footage, setting everything to lower field should work. Maybe it’s in the capture process where it goes wrong. I’m not sure what the process is for DV camcorders that record to DVD. Is it recorded in dvd format (ie. mpeg2) or does it record a DV encoded file as data on DVD (i think that would be the most logical).
You say you are bringing it in uncompressed with DVD2AVI, so you are already doing some conversion there which is where the problem may be. Can you do a normal capture to DV like you would with a normal tape based DV camcorder? That should ensure that you actually get a properly interlaced DV footage file from your camcorder to the computer to work with. -
The Plasma will be de-interlcaing anyway so you will only be seeing a single field. So field order cant be the issue.
Also reading back in the first post, you said that you were separating the lower field but then rendering with lower. You should only render with fields if you have not sepated them, Other wise its like de-interlacing you footage and then re-interlacing upon render.
So I would: In the interpret footage settings, set it to separate lower field first, then when you are good to render, render it out with no fields at all. you will have a progressive movie so should not jerk at all, and will also look more filmic.
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[Ben Kidd853] “You should only render with fields if you have not sepated them, Other wise its like de-interlacing you footage and then re-interlacing upon render.”
Close …
1. If you aren’t distorting, rotating, blurring or moving the footage layer in any way, you can get away with not separating fields when you interpret the footage. You can then render without fields, and you will just be essentially copying the (interlaced) footage unchanged, but with the normal recompression artifacts if applicable. In this situation, rendering with fields only affects any animations keyframed in that comp, and helps the new keyframed animations harmonize with the existing interlaced footage.
2. If you are distorting, rotating etc. you must separate fields. You must. Whether you render with fields or not.
3. If you want to render progressive (no interlacing) you must separate fields, then render with no fields. As Ben said. 🙂
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