Mattress unbox is diegetic foam sound or a silent plate

Vidu vs silent I2V. The unbox and the bed are not the same spend. Plastic peel and foam rising are a soundtrack timed to motion. Quilt pattern, edge tape, and the law tag are identity. Vidu Q3 Image to Video is the sound-forward still-to-motion row. The image-to-video variant on Seedance 2.5 is the hold on the still you already signed. One generate that tries to be both is how you get excellent foley on a mattress that is not on your site.

If the ad is the spec — height, firmness, SKU name — treat the plate as silent and burn type after. Generated foam is not a label.

The bag tear is audio. The quilt is a jpeg.

Mute an unbox and the craft drops: bag, decompress, bounce. Vidu Q3 writes native audio with the picture. Put those two or three sounds in the prompt, tied to motion you can see. A silent brief on this row still gets a score. That is why "I did not ask for music" is not a mix.

The mattress does not care about the score. If the stitch or the tag drifts, the clip is a competitor's bed. Seedance 2.5 I2V is built to extend one approved frame into a continuous take without stitching shorter clips into a second SKU. Lock the still at image prices. Do not discover a wrong tape at video prices.

Image-to-video is the surface either way: the upload is frame one. A paragraph that starts "queen hybrid expanding on walnut" is text-to-video wearing an unbox brief.

Q3's only lengths are 5, 10, and 15

Vidu Q3 I2V requires an image. Audio is on. Ceiling 1080p, with 360p / 540p / 720p / 1080p listed. Durations: 5s, 10s, 15s only. Features named: image-to-video, motion generation, high fidelity. Listed 16 credits, marked discounted (50% on the resolution tiers in the matrix). Discounted is not a 15-second sketch pad.

Write the unbox to five seconds. Bag tear, foam rise, no speech unless you actually want a line. 5s is the shortest legal clip on this slug. There is no 3s cheaper retry if the rise fails. There is no aspect-ratio menu — crop 9:16 or 16:9 before upload.

The still is the contract. Foley will not rescue a law tag you would not print.

The silent plate is a use, not a mute button

Seedance 2.5 I2V: one still in, continuous clip out, 4s–30s, 480p / 720p, native audio, listed 47 credits, resolution-based per second, optional last frame. Thirty seconds in one pass is how the quilt is still your quilt at second twenty-two. 720p is the ceiling.

"Silent I2V" does not mean this row has empty audio. The catalog sets audio on. Silent is how you use it: camera and light only, no mix note, spec burned later. Say quiet room if you do not want a bed. A silent brief still gets one.

Do not send the labelled orbit to Q3. Q3 does not list 4–30s or a last frame. Do not send the five-second bag tear to Seedance because you wanted "longer foley." Split the slate: Q3 for the hit, Seedance for the hold, stitch, then type.

Height, "queen," firmness — editor text. Timed text overlays or a single text overlay. Do not ask Q3 to typeset the inch line onto a moving tag.

FAQ

Can Q3 be the only row if sound is the whole ad?

Yes, when the still is the real mattress and the action fits 5, 10, or 15 seconds. A moodboard still plus great foley is a competitor's unbox.

Why not unbox on Seedance so the rise can last 30 seconds?

Because the point of the unbox is a short diegetic hit. Seedance is the identity pass. One take that tries to be both usually loses the tape or the tear.

Does Seedance I2V output a silent file if I want a spec plate?

No. Native audio is on. Specify a quiet room, then overlay the spec. Do not treat "I omitted the mix" as a mute.

When do I attach a last frame?

When a second approved still of the same unit is the landing — side tape, tag, colourway. A single hero still plus a move is the usual hold.