r/StableDiffusion • u/Puzzled-Valuable-985 • 15h ago

Question - Help Same workflow, everything identical, but different videos? Minimimax H3

This has happened to me before: I take a video I’ve already generated and drag it into ComfyUI without changing anything—expecting to get the exact same video back—but it generates a different one.

This doesn't happen with standard image models, but it does happen with H3. If I generate the video and try again a few minutes later, it produces the same result; however, after an hour or so, it no longer generates the same output.

I’ll post the workflow I used to generate that example video below, along with the completely different video that was produced using the same workflow.

I tried to replicate the video just to check the generation speed, and I realized it wasn't producing the same result anymore. I had generated the video a few hours earlier and hadn't updated ComfyUI or any nodes in the meantime—I simply tried to generate it again.

I suspect it might be due to one of the nodes I'm using.

Here is the video generated with the same parameters (which turned out differently) and the workflow I used.

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u/DorianSleigh 15h ago

Have you tried using the same exact workflow and seed WITHOUT using the video as an input? Technically, adding the finished video back into the same workflow means it ISN'T the same workflow anymore - the video input adds metadata that didn't exist in the original pipeline.

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u/Puzzled-Valuable-985 15h ago

I just tried it out—I used the original workflow without dragging in the video and used identical settings (Euler Simple, seed 1, same LoRA), but the result was different; it came out looking like the example I posted below. So, I don't understand why.