Luffing-jib tower cranes interpolate boom-up to boom-down, 4/6/8s at 40cr

Same crane, jib raised then jib luffed: Veo First Last Frame interpolates 4/6/8s at 4K, 40cr, native audio; skip a talking banksman, and a generated hammerhead is a different crane class.

A luffing-jib listing is a radius change on this tower: mast, cathead, the luffing ram or pendant lines that actually pull the jib, the counter-jib that stays in frame. Boom-up is the first plate. Boom-down is the last. Interpolation is the ad. A paragraph that draws a hammerhead with a trolley running a horizontal arm is a different crane class. A talking banksman is a mouth you did not hire.

Boom-up and boom-down are two plates of one crane

Photograph the crane you sell, or the crane on the site you will actually work: same mast sections, same slew ring, same camera height, same sky family. Jib steep — small working radius, boom-up. That is frame A. On the same machine, luff the jib down until the radius is the one the spec sheet names. That is frame B.

First-last frame takes those two stills and generates the motion between them. Ordinary image-to-video knows where it begins and improvises the rest. First-last has to land. The arc of the shot is decided by you.

The two frames have to be connectable in four, six, or eight seconds. Same crane, same lens family, same lighting neighbourhood. A boom-up isometric morphing into a wide of a different city block is a warp, not a luff. Keep the luffing ram, the pendant lines, and the mast in both stills.

Prompt the travel, not the objects. The stills already contain the crane. Name the mechanism: camera locked; jib luffs from raised to lowered; no new mast; no trolley growing on the arm. If the endpoints share geometry, the morph reads as a radius change. If they do not, you get a mushy crossfade you could have made in an editor without a video bill.

Do not generate frame B. A "luffed" still the model painted is a different boom and often a different class. Specifiers who walk tower cranes will notice the jib geometry before they notice your logo. Keep people out of both stills if you can.

Veo First Last Frame interpolates 4/6/8s at 4K, 40cr

Create a first-and-last-frame transition video is the named agent job: two photos in, one transition out. The agent passes them as first and last frame and picks a first-last-capable model. Cost is priced per model, shown before you confirm. This is not the plain "turn one photo into a video" capability. Missing the boom-down plate is a different job.

VEO First Last Frame is the catalog row for this interpolation: image-to-video between a first frame and a last frame, 4s / 6s / 8s, official 4K tier, 40 credits, native audio on. Four seconds is the floor. Eight is the ceiling. There is no 5s, no 20s, no 30s on this slug. A one-beat ram stroke belongs on 4s or 6s. Do not ask the row for a minute of site time-lapse.

Audio is on. Write the mix (a quiet site, a faint hydraulic bed) or write silence. A silent brief on a native-audio row still gets a soundtrack you did not choose. Quoted banksman calls in the prompt do not become a title card, and they do not become a person.

A loop (the same boom-up still in both slots) is ambient wiggle on one plate. It is not a luff. This offer needs two states: jib raised, then jib luffed. Inspect the midpoint: a trolley that appears on a luffing arm is a miss. Reroll the interpolation. Do not regenerate both stills "to match the motion."

A generated hammerhead is a different crane class

Hammerhead (saddle-jib) tower cranes keep the jib horizontal. Radius changes by trolley travel along that arm. Luffing-jib cranes change radius by raising and lowering the jib. Those are not interchangeable drawings. A generate that "helps" by flattening the jib into a hammerhead has restaged the SKU. A generate that adds a trolley to a luffing arm has invented a hybrid nobody ships.

Do not prompt "cinematic tower crane on a city skyline, trolley running out." That sentence is a hammerhead brief. If the stills show a luffing ram, the prompt may only name the luff. Do not prompt a new building behind the mast. The model will connect whatever you give it; a different skyline is a morph of the site.

Image-to-video from one boom-up still is allowed motion with an open ending. The model will guess the last pose. A luffing-jib listing needs boom-down as last frame. A single-image wiggle that leaves the jib steep is not a radius change.

Skip the talking banksman. A constructed signaler walking the exclusion zone is a presenter you did not hire. The luff is visible without a mouth. If a site-safety line must appear, burn it after picture lock as type you typed.

/for/contractors is a renovation calendar, not this luff

Contractors already sit on a homeowner-facing page: process-transparency, a demo-day time-lapse, a problem-and-fix on site, a final walkthrough. Two posts a week. 9:16. Facebook and Instagram Reels. That playbook is for shops that close a kitchen, not for a crane-hire yard selling a luffing radius.

Do not rewrite that page as a talking banksman on a generated slab. Do not caption a hammerhead as last week's luffing job. The hung crane is the proof. A generated city block is not a spec sheet.

Order: two approved stills of the same luffing-jib crane; Veo first-last at 4, 6, or 8 seconds, 4K available, 40 credits; prompt only the luff. Reverse that order and you will pay for a cousin hammerhead that grew a trolley on the way down.

FAQ

Can I animate one boom-up still and hope the jib luffs?

You can. The ending is then the model's guess. Boom-down is the product state. Pin it as the last frame or you are not selling the radius change.

Why skip a talking banksman?

Because the luff is visible on the photographed jib, and a constructed signaler is a mouth you do not need. Write silence or a quiet site bed on the Veo row. Overlay a safety line after picture lock if the mute feed needs one.

Do the two photos have to be the same crane?

Yes. Same mast, same cathead, same luffing geometry. A boom-up of crane A into a boom-down of crane B is a morph. A luffing jib into a hammerhead is a different class.

Is this the same as the contractors /for page?

No. Contractors is a renovation calendar. This leftover is one luffing-jib crane, boom-up to boom-down, on Veo first-last at 4 / 6 / 8 seconds, 4K, 40 credits.