EMS: line motion after the board still is locked

Kling for the line. Seedance for the board.

Electronics manufacturing video has two objects mashed into one prompt: the board that must remain the SKU, and the line that has to move around it. Animate the board from a locked still. Invent the line as motion. Do not ask one generate to redesign the silkscreen and run the conveyor.

Seedance 2.5 Image to Video is the board job: one approved still, motion forward, native audio, 4s through 30s, 720p ceiling, optional last frame. Forty-seven credits listed. Image required. Kling 3 Turbo Text to Video is the line job: no image required, audio off, 3s–15s, 1080p, twelve credits listed (ten when discounted). Silent physics. Not a talking plant manager.

The board is a contract

A board still is locked when engineering would ship the photo: copper, legend, the connector on that revision. If that frame is wrong, every second of video is a recall.

Seedance I2V treats the still as the first frame. Camera and physics are allowed on top — a push along the panel, a last frame on the barcode if you attach a second image. Thirty seconds in one pass beats stitching four short clips around a product that then grows a second logo.

720p is the ceiling on this endpoint. Feed and site loops can live there. A 2K plate you intend to grade is a different model. Identity is not.

Do not send the board to Turbo. Turbo invents the subject. That is how revision D becomes a cousin. Lock the still before you spend on motion. Then buy motion.

The line is invented motion

A conveyor, wave-solder glow, magazines indexing — often not a specific SKU. Atmosphere. Turbo is built for that: text-to-video, fast, silent, 3s tests before you buy 15s.

Write camera and action. Do not write the BOM. Aspect is 16:9, 9:16, or 1:1. Score later; audio is false.

If the line must show this panel, you are back on Seedance. Turbo is the wrong door the moment the copper has to match.

Two files, one cut

A plant ad is usually both jobs. Split it.

1. Lock the board as a still. Animate on Seedance I2V at a length you would ship.
2. Generate line cutaways on Kling 3 Turbo at 3s–5s until the motion is right.
3. Stitch. A cut is cheaper than asking Turbo to honour a legend or Seedance to invent a factory it has no photo of.

Seedance 2.5 vs Veo 3.1 vs Kling 3, picked by job is the same table: I2V lock on Seedance, motion on Kling, talking mouths elsewhere. A spoken plant tour is a third file. Do not put that line on Turbo.

Last-frame control is for a destination you already photographed. It is not a way to skip the first still.

Pause on the legend

Pause on the copper. If the I2V take still reads as the board you approved, keep it. If the T2V take has a prettier factory and a different part number, you used Kling as a product renderer. Throw that take at the line, not at the SKU.

FAQ

Can I text-to-video the board if Kling is cheaper per second?

Not if the legend has to match. Turbo does not take a still. Cheap motion on the wrong object is a respin. Lock the board on Seedance I2V. Use Turbo for shots that are allowed to be generic.

Do I need a last frame for every board move?

No. A single hero still plus a camera move is the usual job. Add a last frame when the shot must land on a second approved photo. Control, not a default.

Why is Seedance capped at 720p here?

That is the I2V endpoint's listed ceiling: 480p and 720p. Resolution is a delivery choice. Identity is the I2V choice. If you need a 1080p line cutaway, Turbo lists 1080p — on the shots that are allowed to be invented.

Should the plant manager talk on the same generate?

No. Turbo is silent. Seedance native audio is room and motion, not a locked brand voice. A talking take is a native-audio or avatar row, cut in after the board is already true.