Interpolation
Chooses the position between Image0 and Image1; 0.5 is the midpoint.
← Fusion node reference
TemporalAdvanced
Tween
Optical-flow interpolation between two images
Synthesizes an intermediate frame between two images using interpolation, depth ordering and optical-flow warping.
Tween
DaVinci Resolve · Fusion
Tween is useful for motion-compensated in-between frames, short retiming repairs and transitions where a simple dissolve would create obvious double exposure.
Overview
What Tween does
Tween is useful for motion-compensated in-between frames, short retiming repairs and transitions where a simple dissolve would create obvious double exposure.
Think of Image0 and Image1 as the endpoints of a tiny time interval. Tween estimates motion between them and moves pixels toward the requested Interpolation position.
Mental model
Think of Image0 and Image1 as the endpoints of a tiny time interval. Tween estimates motion between them and moves pixels toward the requested Interpolation position.
Common uses
Intermediate-frame synthesis
Short slow-motion repairs
Motion-compensated transitions
Missing-frame reconstruction
Optical-flow diagnostics
Flow anatomy
Inputs & outputs
The port structure shows how this node fits into a Fusion graph.
Image0
Source image for the operation.
Image1
Source image for the operation.
Effect Mask
Optional mask that limits where the node affects the image.
Tween
Fusion node
Image Output
The processed result from this node.
Inspector
Important parameters
Start with these controls before reaching for more complicated workarounds.
Depth Ordering
Chooses which motion should appear on top at occlusions.
Fastest On Top
Gives the fastest-moving warped regions priority when they overlap.
Slowest On Top
Gives the slower or more stable warped regions priority when they overlap.
Clamp Edges
Reduces edge gaps created by warping.
Source Frame and Warp Direction
Chooses which source frames and forward/backward optical-flow warps contribute to the in-between frame.
Forward Image0
Uses Image0 with the forward optical-flow warp.
Forward Image1
Uses Image1 with the forward optical-flow warp.
Backward Image0
Uses Image0 with the backward optical-flow warp.
Backward Image1
Uses Image1 with the backward optical-flow warp.
Optical Flow Options
Opens the motion-estimation method and advanced optical-flow controls used by Tween.
Method: Classic
Uses Classic for method.
Method: Advanced
Uses Advanced for method.
Advanced
Exposes deeper optical-flow controls for difficult shots.
Practical setup
A reliable workflow
- 1
Connect the two neighboring frames.
- 2
Set Interpolation to 0.5 for the hardest test.
- 3
Compare depth-ordering modes.
- 4
Check edge clamping.
- 5
Compare Classic and Advanced flow.
- 6
Inspect occlusions in motion.
Typical node chain
Source→
Tween→
Output
Examples
Where this node fits in real work
Missing midpoint
Generate a synthetic frame between two neighbors.
Frame ATweenFrame B
Retime repair
Insert Tween into a short optical-flow repair chain.
FramesTweenTimeSpeed
Troubleshooting
Common mistakes
Pushing Tween farther than the source resolution can support
Animating several Tween controls that fight each other instead of choosing one clear primary control
Judging Tween edge quality only in a proxy or reduced-resolution Viewer
Production notes
Practical tips
Keep the main Tween transform logic together instead of scattering equivalent adjustments across several nodes.
After a strong Tween deformation, inspect image edges and alpha for stretching or resampling artifacts.
Preview animated Tween work at normal playback speed as well as frame by frame.
Related nodes