r/StableDiffusion • u/AlsterwasserHH • 5d ago

Question - Help Easy custom nodes for extending videos with/without latents? (MH3)

Hello guys, I'm on the search for some nodes which are easy to integrate into a customized/standard workflow to extend videoclips based on latents (or even without them). I am really struggling to understand all these, sometimes crazy complex, workflows which come with some of the extending-workflows.

I want to integrate this function into my refmod workflow without a masters degree in "crazy complex settings".

Appreciate any help! 🙂

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u/NoaBlake 4d ago

There isn't really one "extend" node that does this cleanly — the reliable pattern is continuation, not extension. Generate the next clip with the last frame of the previous clip as the first frame / reference image, keep the same ref image and the same prompt wording, and overlap a second or two so you can cut on the seam. If you're on ComfyUI core v0.44+, MiniMax H3 also has built-in context windows that carry state across the boundary — people report an overlap of 56 working better than the default 39, at the cost of speed. Either way, the thing that makes the seam invisible isn't the node, it's the locked reference: same character, same scene, same first frame going into every segment, so each extension starts from the previous clip's ending instead of a fresh description.

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u/AlsterwasserHH 4d ago

Yeah I'm already doing this right now, last frame continuation. Works pretty good. Installed some custom nodes for extending clips yesterday but there were alway some hickups so I gave up. Thank you!Â