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Forums Apple Final Cut Pro X What's this artifact and how to prevent it?

  • What's this artifact and how to prevent it?

     Mark Suszko updated 2 months ago 2 Members · 3 Posts
  • Mark Suszko

    July 23, 2021 at 4:49 pm

    This is a new one on me. Studio-shot footage, 601, pro res 422 on Aja hard drive recorders. Created project based on the incoming footage as per default. Editing in pro res 422 throughout, used this footage in a chromakey shot… and you can see the motion artifacting in the teeth/lips in this shot. What’s up here, how do I fix or prevent it? The hardware has not been changed, though the studio cameras are new Panasonic Ak series with the nice big Canon box lenses. My FCPX is still at 10.4.6 because it’s stable and performs just fine for my needs and the newer features haven’t been relevant to my kind of work. I don’t think it’s a version problem but maybe some setting getting messed up somewhere in the production chain.

    My method here was to pre-compose the raw green screen shots and their backgrounds, render them out prores 422, then import them (without re-copying, just pointing to them) and cut the actual program from the raw wide and tight shots . There were no proxies used.

    Just to be clear, I’ve done a ton of green screen comps like this without incident, but the artifact is something new.

    Any thoughts welcome.

  • Marco Feil

    July 23, 2021 at 5:15 pm

    did you record interlaced? could also be that you recorded progressive but fcpx interpreted the footage as interlaced. you can force progressive/upper or lower first in the inspector in settings view under ‘field dominance override’.

  • Mark Suszko

    July 23, 2021 at 6:55 pm

    You nailed it, Marco: the 1080 HD was set to interlaced, not progressive. One click and we’re good to go, thanks very much! This, right here, is what makes the COW such a valuable resource. Have a great weekend!

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