Slide the umbrella runner upward and follow the ribs opening

Original, untested video brief. No input image or generated result is supplied.

1. Task and boundary

Make one compact umbrella open through its visible linkage. The runner slides up the shaft, the attached stretchers change angle, and the same ribs spread the existing fabric. The useful evidence is the connection between those events. A wide canopy that simply replaces a narrow silhouette does not establish an opening. Choose a diagram-like view where the runner and at least two complete linkage paths remain readable.

This is an original, untested visual brief for a correctly drawn manual umbrella. It does not predict a particular product’s travel, opening force or locking behavior. Start with the canopy slightly open so the mechanism is not hidden in a tight fabric bundle. Request one modest continuation toward the open pose, with no automatic button, telescoping shaft, wind or inversion.

2. Authorized first frame

Use a photograph or accurate drawing that you own or may use. Fix a vertical shaft in a simple tabletop clamp. Show its upper hub, one lower sliding runner, the existing stretchers and the ribs connected to the canopy. The original hand already holds the runner from one side, leaving its upper edge visible. A side view with slight elevation should reveal two front linkage paths without turning them into detached external rods.

Give one front fabric panel an existing small color patch. Keep the background plain and leave room for the canopy to widen. The upper hub and clamp need clear reference edges. If the input does not show credible joints and fabric attachments, repair that input first; asking for motion cannot establish missing geometry.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the complete prompt, check the available settings and cost estimate, then submit only when ready. This page supplies text; it does not upload an image or start a generation.

4. Prompt and timing

Begin with my authorized view of one slightly opened manual umbrella on a fixed shaft. Keep the clamp, shaft and upper hub still. The original hand slides the same runner slowly upward along the shaft. Preserve the runner’s hole around the shaft and keep each stretcher connected to its original runner joint and rib joint. As the runner rises, let the existing ribs rotate outward around the fixed upper hub and spread the attached fabric into one continuous canopy. The marked front panel stays between the same neighboring ribs. Keep the visible rods at their original lengths and let their joint angles change. Stop the runner below the upper hub when the canopy has opened to the intended pose, then hold. Do not scale up the entire umbrella, lift the hub, add ribs, swap the fabric, slide the canopy off its tips or show a hidden lock as proven. No cut, extra hand, camera arc, wind burst or automatic second movement.

1. Opening: locate the fixed hub, runner and two connected front linkage paths before the hand moves.
2. Middle: follow upward runner travel together with changing stretcher angles and widening rib tips; pause if a joint becomes hidden.
3. Ending: hold the wider canopy long enough to compare the original patch, rib attachments and hub position.

These beats are author suggestions, not exact model timing guarantees. Adapt their proportions to the clip length actually available.

5. Inspect the output

After inspecting your own output, record a time or frame, visible observation and pass, fail or inconclusive judgment for each condition. A convincing ending alone does not verify the preceding action.

• The upper hub, shaft and clamp retain their initial positions.
• The runner translates along the shaft instead of rotating away or passing through it.
• The two chosen stretchers remain attached at both original ends.
• Existing rib tips spread while the marked panel stays between its original neighbors.
• The fabric expands by unfolding with its attachments, not by appearing as a larger replacement.
• If the hand or fabric hides the runner-to-rib connection during the change, mark the linkage check inconclusive.

6. Fix one failure

• The canopy grows without joint motion: simplify the first-frame linkage and ask for a smaller visible opening.
• The upper hub follows the runner: anchor the hub to a clear shaft reference mark.
• A stretcher detaches: choose a view with both of its original joints visible throughout.
• New ribs appear under the fabric: reduce overlap and track the original visible front ribs.
• The fabric turns inside out: remove wind language and stop before an extreme opening pose.

7. Ending and limits

Finish with the runner higher on the unchanged shaft and the same attached canopy wider above it. Preserve the stopped pose rather than adding a closing cycle.

Save your own generated result through the available result controls, together with the authorized input, exact prompt, settings and inspection notes.

No generated result, product test or measured mechanical travel is supplied. Visible joint continuity can support a limited judgment about the depicted opening. It cannot verify concealed ribs, fabric tension, a latch engagement or the reliability of a real umbrella.

The iris-aperture task changes an opening between overlapping rigid blades. This task follows a translating runner through linked stretchers to ribs that unfold one attached fabric canopy; the central shaft and upper hub remain fixed.