Rotoscoping Fields

Learn how to set up your ย After Effects composition to rotoscope footage imported with fields. Please excuse the room ambience included with the audio, my regular microphone failed during this recording.

Discuss
  1. illd
    Reply

    Thank you JD for solvin another mystery. Is there any Motiondesigner/Effects Artist out there who doesnt hate fields? To me fields make no sense at all – nice to have this workaround.

    • Ryan Ragle
      Reply

      I agree illd, fields should be banned. This is a great tip for roto work, except you just doubled the workload ๐Ÿ™‚ Then again, without a handy tip like this, we would probably spend more time trying to guess how to fix it.

      • John Dickinson
        Reply

        Hey Ryan, remember to only roto the extra frames that need it. Best wishes, John.

    • John Dickinson
      Reply

      Hi illd, fields are the unfortunate legacy of a by-gone era for sure! Best, John.

      • illd
        Reply

        “By gone era” – I wish you where right. But when I see some “new” HDV-Formats like 1080i(nterlaced, aaaargghh). The same trouble starts again – just in better resolution, which is ridicolous ๐Ÿ™

  2. John Dickinson
    Reply

    Thanks Ahme, I learned this technique some years ago reading Trish and Chris Meyer’s book “Creating Motion Graphics for After Effects”. All the best, John.

  3. John Dickinson
    Reply

    Hey Brian, that’s funny, I learned the exact same way! ๐Ÿ˜‰ Best, John.

  4. Robert Kreuz
    Reply

    Hi John,

    first – thanks for hosting this site, it`s a very impressive source for my work.

    second – is following workaround for fields also possible ?

    Step one, do rotoscoping like ever, render out as progressive.
    Step two, take the progressive movie and put it into a encoder or After Effects and render out as a movie with fields ?

    • John Dickinson
      Reply

      Hi Robert, I’m glad you are finding value in Motionworks. The workflow you mention has a flaw; separating the fields then rendering without fields (progressive) means you are losing half the vertical resolution of each frame. Remember that when you separate fields, After Effects is interpreting the pixels that have been “removed”. If you render this out the information is gone completely. Does that make sense? Best wishes, John.

      • Robert Kreuz
        Reply

        Losing vertical resolution, yes it`s a good argument.
        I thought, if you let AE to interpret the fields of your footage, than you have ever a loosing of vertical resolution, whatever kind of movie you want to render out fields or progressive. Thought the only way to keep the fields is to don`t interpret and than render out as upper or lower field.

        • John Dickinson
          Reply

          Hi Robert, that’s the difference between “separating” fields and “deinterlacing”. Deinterlacing removes them permanently where as separating only temporarily.
          Best wishes, John.

          • Robert Kreuz

            Thanks John, I can see clearly now, the rain is gone……..

    • John Dickinson
      Reply

      Thanks Todd, I keep meaning to update the Adobe Help! Best, John.

  5. Jim Hines
    Reply

    I was away from the machine for a few days but happy to come back and find this. Thanks!

    • John Dickinson
      Reply

      Hey Jim, how did you manage to get away from your machine? Mine is like an anchor… though a very powerful anchor that can connect to the web ;o)

  6. Topher Welsh
    Reply

    Good stuff man, as always… this has always been a frustrating task for me…

    • John Dickinson
      Reply

      Thanks Topher, it’s one of those things that can stump you unless you know the steps for sure. Best, John.

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