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Known Participant
March 27, 2019
Question

Unable to render interlaced footage in AE without artifacts

  • March 27, 2019
  • 1 reply
  • 4724 views

I've been having issues problems with exporting interlaced footage - even with no effects or adjustments applied - through After Effects.

I'm working with 720x480 DV AVI files (I know, small, but that's the source and I need to be able to work with them).

They seem to render fine through Media Encoder, but I need to be able to use the Render Queue. (Render Queue is able to handle slight upscaling without quality loss whereas Media Encoder seems unable to do so.) However, when I do export these files through the Render Queue, I get aliasing/jagged lines in the image that appears to be an issue with how it is handling interlacing.

I've made sure the field order matches between the footage and interpretation (lower field first) and when they do, I get the aliasing. I've tested it with the field order set to 'off' in interpretation and also with it left on 'lower field first' there and set to 'lower field first' in the render settings, and both of those options result in the slashed lines in motion of visible interlacing.

I'm not sure how to avoid either type of artifact in exporting interlaced footage through the Render Queue.

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1 reply

Known Participant
March 27, 2019

I forgot to note that when I change the field order and get the slashed lines/visible interlacing, it fixes the jagged lines/aliasing issue. I wind up with either issue, though not both simultaneously.

Dave_LaRonde
Inspiring
March 27, 2019

Add your comp to the Render Queue.  Go to the Render Settings.  Make sure the field order in them is also set to lower field first.  You should be fine then.

Known Participant
March 27, 2019

I have tried this, unfortunately. When I add it to the Render Queue and go to Render Settings and select 'lower field first' in the Field Render drop-down, I get the visible interlacing (slashed lines in motion), though it does fix the aliasing/jagged lines issue.