• Adobe After Effects

  General low-grade flicker

  Posted by Dex Craig on July 8, 2005 at 12:17 am

  Hi, all —

  I’ve been working with AE for a very long time, and do know my field order and such, but have always been able to spot the difference between a shot that has not been through AE and one that has. There’s always a slight staccato look to the image — it’s not reversed field order, but there’s something that doesn’t look quite as smooth as straight DV footage. It almost looks like video shot with a super fast shutter speed, but not quite. Does anyone know what I’m talking about here? It’s not visible on a computer monitor, but is visible when played back on a good quality NTSC studio monitor. I’d love to figure out how to get rid of this effect. Am I missing something obvious?

  Any suggestions would be appreciated.

  Thanks!
  – Dex

  Jeff Dobrow replied 20 years, 10 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Steve Roberts

  July 8, 2005 at 1:40 am

  Hmmm. It sounds as if the footage was rendered progressive. Either that, or it’s an artifact of field separation on interpretation, if there is such a thing. Haven’t tested that.

  Can you reproduce this effect with the footage interpreted with field separation off and with no transforms or effects applied within AE, then rendered to the DV codec?

  (If you do nothing to the footage, it shouldn’t matter whether you render fields on or off in this case … though I haven’t tested that either.)

  Steve
• 

  Jeff Dobrow

  July 8, 2005 at 4:27 pm

  Hmmmm……..I have never used DV footage with AE. But I can say without a doubt that Dbeta footage, taken in via SDI, processed or not, rendered out, sent back to Dbeta via SDI has has no such artifacts. Come to think of it, neither does BetaSP taken in via component…….

  A ‘guess’ would be that DV footage is compressed from the get-go (in a sense) and that re-rendering to the DV codec ‘may’ do something????

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