Preview a presenter separation
Check whether a short talking or demonstration shot can read against a neutral compositing background.
AI Video Tool
Video Subject Cutout
Separate a moving subject in a short clip with careful treatment of hair, soft edges, translucent details, motion blur, and frame-to-frame continuity.
Illustrative workflow preview
Task-specific workflow
This page uses a fixed moving-subject matte instruction automatically; it does not expose a manual matte prompt or alpha export control.
Create your version
Upload one source video
Create your version
This page uses a fixed moving-subject matte instruction automatically; it does not expose a manual matte prompt or alpha export control.
Create with Video Subject CutoutHow this tool works
Video Subject Cutout, with the inputs and limits made clear
Separate a moving subject in a short clip with careful treatment of hair, soft edges, translucent details, motion blur, and frame-to-frame continuity.
What to provide
- One source videoUpload the short clip containing the moving subject whose edges and separation you want to test.
Steps
- Upload one source video no longer than 15 seconds with the subject visible through the key movement.
- Run the fixed moving-subject matte workflow; no reference image or editable prompt is required.
- Review hair, soft edges, transparent details, motion blur, and the neutral background across frames.
What to expect
- One video composition with the moving subject separated against an evenly lit neutral background.
- The subject’s body movement and broad identity should remain recognizable while the workflow attempts stable edges.
- The result is a composited preview and should not be treated as a guaranteed production-ready alpha channel.
Where results can vary
- Fine hair, transparent objects, motion blur, and similar foreground/background colors can produce soft or noisy edges.
- Overlapping people, rapid exits from frame, and large camera changes make consistent separation more difficult.
- This fixed workflow does not provide a manual mask, alpha download promise, or per-frame matte correction interface.
Practical starting points
Use Video Subject Cutout for focused video experiments
Inspect hair and soft edges
Evaluate challenging edge detail in a moving portrait before investing in a manual matte pass.
Prototype a layered shot
Explore a foreground/background composition idea with a short moving subject and simple backdrop.
Questions before you run it
Video Subject Cutout FAQ
Does video matting export an alpha channel?
The configured page produces a subject-on-neutral-background preview. It does not promise a production-ready transparent alpha export.
Can I edit the matte prompt or draw a mask?
No. This page uses a fixed preset and does not expose an editable prompt, manual mask, or frame-by-frame matte controls.
What footage is hardest to matte?
Fine hair, translucent materials, fast movement, heavy blur, overlapping subjects, and low contrast against the background are common boundaries.
Starts with the source material this task actually needs
Keeps a focused prompt without unrelated presets
Opens the task and final result in your Create feed