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Activity Forums Adobe After Effects premultiplied vs interlaced

  • premultiplied vs interlaced

    Posted by Heath Alseike on February 12, 2010 at 5:10 pm

    Just curious, can any one explain the difference between premultiplied vs interlaced when rendering mov’s or avi’s. Then what one is better for standard def Broadcast. Thank you.

    Walter Soyka replied 16 years, 2 months ago 2 Members · 1 Reply
  • 1 Reply
  • Walter Soyka

    February 12, 2010 at 5:56 pm

    [Heath Alseike] “Just curious, can any one explain the difference between premultiplied vs interlaced when rendering mov’s or avi’s.”

    They don’t really have anything to do with each other, so there’s no difference to explain. The AE livedocs have pretty good introductions to both, so these links might be a good starting point.

    “Premultiplied” refers to a way of storing transparency information; more information on premultipled vs. straight alpha here.

    Interlacing is a method for transmitting and displaying video (vs progressive display); see here for more.

    Walter Soyka
    Principal & Designer at Keen Live
    Motion Graphics, Widescreen Events, Presentation Design, and Consulting
    RenderBreak Blog – What I’m thinking when my workstation’s thinking
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