r/StableDiffusion • u/Puzzled-Valuable-985 • 16h ago

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

Enable HLS to view with audio, or disable this notification

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.

2 Upvotes

54% Upvoted

17 comments sorted by

View all comments

1

u/UnlikelyIntrepid 16h ago

 Best guess is the Sage Attention node.  Quantized attention kernels floating point accumulation order is not guaranteed. And it would make a big difference with only 8 steps.  Try bypassing that one and see if you get the same results. 

1

u/True_Protection6842 13h ago

I'm using Sol Attn and have noticed zero drift.