The reason most AI-generated ads look assembled is that the models behind them stop at 5 to 15 seconds, so a 30-second spot has to be built from separate renders — and the subject changes face, the room changes shape, and the light jumps at every cut. This page runs LongCat Video, which takes up to 961 frames in one job. At the 30 frames per second it renders and bills at, that is 32 continuous seconds: enough for a complete product demonstration, a full before-and-after, or a script with a beginning, a middle and an end, with the same subject throughout.The reason most AI-generated ads look assembled is that the models behind them stop at 5 to 15 seconds, so a 30-second spot has to be built from separate renders — and the subject changes face, the room changes shape, and the light jumps at every cut.
A long render is not a longer clip — it is a sequence. Describe what happens first, then next, then last, in order, as one unbroken shot. "Unlocks the door, lifts the blinds, grinds beans, pulls a shot" gives the model a timeline to fill. A single static description will produce 32 seconds of very little happening.
Anything from 5 to 32 seconds, and you are charged per second, so a 30-second render costs six times a 5-second one. Decide the cut length before you generate rather than producing 32 seconds and trimming to 12 — the credits go the same way either way.
The render comes back as an MP4 with no audio. Hand it into the Creatives canvas to add a voiceover or a music bed, trim the head and tail, and lay captions over the top before it goes anywhere near a campaign.
Use cases
Thirty seconds is the length broadcast, CTV and pre-roll are sold in, and it is exactly the length generative video has been worst at. A single continuous render removes the hardest part of assembling one — matching a subject and a light across separately generated clips that were never going to agree.
Unboxing, assembly, preparation, a before-and-after transformation — anything whose whole point is that one thing turns into another. Cut across two renders it reads as two different objects; in one pass it reads as a demonstration.
A five-second clip gives an editor one usable moment. Thirty seconds of the same scene gives them a choice of in-points, room to hold a shot under a line of voiceover, and enough material to build a rhythm rather than a slideshow.
Soku AI
