Duplicate stuff out of frame ..... does it still exist?

Hi folks,

Sorry to be bombing the forum with so many questions, but there's lots to learn!

Please take a quick look at the films below.

In the first one, i have some text, I duplicate it 4 times and then start offsetting it on the Y axis.

I keep going until i have lost the top two copies out of frame.

My question is: where are they?

Are they lost forever?

I would imagine / hope that if i increase the height of my background going into the merge, that they would re-appear, but alas, no.

This seems to me to be important, because if you want to do a transform after and bring them back into frame, they're lost, as in the example in the second video below.

Of course these are "toy" problems, but i need to understand how this works!

No, if Duplicate sends something outside the raster, those pixels are discarded. You can precompose on a larger raster by cropping your image larger prior to the Duplicate node, then crop it back down afterward, setting Clipping Mode to 'none' to avoid destroying the information outside the frame. Note the use of "Keep Centered" in both Crop nodes.

Code: Select all

{
   Tools = ordered() {
      Duplicate1_1 = Fuse.Duplicate {
         CtrlWZoom = false,
         Inputs = {
            Copies = Input { Value = 8, },
            Center = Input { Value = { 0.570819399344308, 0.5 }, },
            RandomSeed = Input { Value = 22899, },
            Background = Input {
               SourceOp = "Crop1",
               Source = "Output",
            },
         },
         ViewInfo = OperatorInfo { Pos = { 880, -610.5 } },
      },
      Crop1 = Crop {
         Inputs = {
            XOffset = Input { Value = -960, },
            XSize = Input { Value = 3840, },
            YSize = Input { Value = 1080, },
            KeepCentered = Input { Value = 1, },
            Input = Input {
               SourceOp = "Background4",
               Source = "Output",
            },
         },
         ViewInfo = OperatorInfo { Pos = { 770, -610.5 } },
      },
      Background4 = Background {
         Inputs = {
            GlobalIn = Input { Value = 1001, },
            GlobalOut = Input { Value = 2000, },
            Width = Input { Value = 1920, },
            Height = Input { Value = 1080, },
            ["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
            TopLeftRed = Input { Value = 0.127, },
            TopLeftGreen = Input { Value = 0.175, },
            TopLeftBlue = Input { Value = 0.67, },
            EffectMask = Input {
               SourceOp = "Ellipse1",
               Source = "Mask",
            }
         },
         ViewInfo = OperatorInfo { Pos = { 660, -610.5 } },
      },
      Ellipse1 = EllipseMask {
         Inputs = {
            MaskWidth = Input { Value = 1920, },
            MaskHeight = Input { Value = 1080, },
            PixelAspect = Input { Value = { 1, 1 }, },
            ClippingMode = Input { Value = FuID { "None" }, },
            Width = Input { Value = 0.0512147938478281, },
            Height = Input { Value = 0.0512147938478281, },
         },
         ViewInfo = OperatorInfo { Pos = { 550, -610.5 } },
      },
      Crop2 = Crop {
         CtrlWZoom = false,
         Inputs = {
            XOffset = Input { Value = 960, },
            XSize = Input { Value = 1920, },
            YSize = Input { Value = 1080, },
            KeepCentered = Input { Value = 1, },
            Input = Input {
               SourceOp = "Duplicate1_1",
               Source = "Output",
            },
            ClippingMode = Input { Value = FuID { "None" }, },
         },
         ViewInfo = OperatorInfo { Pos = { 990, -610.5 } },
      }
   }
}


Turn on the DoD display to see the extent of information that Fusion still 'remembers' even though it's out of frame. I forget where that's been hidden away in Fu/Resolve 16. Either in the right-click context menu or in the '...' in the upper right.

A million thanks Bryan, that fixes it!

Just a quick question:

What does "DoD" stand for?

Domain of Definition. A rectangular area in which pixels exist. Sometimes also called the Data Window. The DoD can be larger or smaller than the composition's frame, and may even be outside it entirely.

Many tools discard information outside the frame, but some can be set to not do so. Blur, for example. By default it clips information to the edges of the frame, but if you set Clipping Mode to None, it preserves the DoD, which is slower but sometimes necessary.

Great, all clear!