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Forums DaVinci Resolve How do I make a mask on one clip with good epsoure and mask it in to the other?

  • How do I make a mask on one clip with good epsoure and mask it in to the other?

     Glenn Sakatch updated 2 weeks, 1 day ago 4 Members · 5 Posts
  • Mads Landdorf Rasmussen

    January 7, 2021 at 12:58 pm

    Hi there,

    One feature i’m really missing in davinci is the ability to take to static shots and mask over one clip.

    I really don’t know how to explain it, but it’s a popular thing to do.
    Lets say I have a subject in the front with a blown out window in the back.
    Then I can make a new shot where I expose for the window and one shot where I expose for my person.

    In premiere I just put the clip over the other clip and then put a mask on the window.

    But I can’t figure out how do that in davinci.
    I would really appreciate if someone could help me here 🙂

  • Tom Watson

    January 7, 2021 at 5:25 pm

    With a static shot, this is fairly easy to do, but I am not sure how to easily describe the process. With motion involved it becomes more complicated, but is the same essential process.

    I have to leave this morning, and only have time for a basic description, so please feel free to ask further questions.

    You need to make an identical copy of the clip, and place one over the top of the other in the timeline. On the color page, you will need to create an alpha channel for the top clip. Then create your mask on the top clip so the bottom clip is visible in the area you want to manipulate. Then, whatever changes you make on the bottom clip should be visible without effecting the top clip. You will need to play with softening in the alpha window to make it look natural.

    When motion is involved, do not make the duplicate clip until you have done all you want to do to the clip. That way, both clips will track when things move.

  • Mads Landdorf Rasmussen

    January 7, 2021 at 5:55 pm

    I only do static shots and that desciption was perfect!
    Thank you so much 🙂

  • Michael Gissing

    January 8, 2021 at 1:13 am

    On the Color page it is possible to add a mask to a node, track the mask and correct inside the mask. Then make an Outside node which carries the tracked mask but allows grading outside the previous node. This is how I would approach the problem, not creating duplicate clips on tracks. It’s the same thing but neater if you are just grading. It also means any adjustment to the mask in the Inside node is carried to the Outside node automatically. This also makes it simple to copy that grade to other shots with similar content without having to duplicate clips and remember which layer needs which grade.

    The idea of creating lots of duplicate clips on tracks is based on the limitation of grading in Pr. It is worth reading up on the different node types in Resolve.

  • Glenn Sakatch

    January 9, 2021 at 4:35 pm

    I agree with Michael. Resolves 32 bit float means you can do all sorts of adustments in a string of nodes, or create layer or parallel nodes to do this type of work. There is no need for multiple versions of the shot. Give it a try. Over expose on node 1, so a window is totally blown out, then on node 2, draw a shape around the window and bring the exposure back down…or do it with a layer node as the input being your source for each node.

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